A new desktop headphone amplifier with advanced, R2R DAC technology developed by FiiO High-performance desktop DAC/AMP R2R Fully differential 24-bit R2R resistor array NOS/OS Dual-Mode Free Switching Professionally designed electronic volume control chipset(NJW1195A) Supports 32-bit/384kHz PCM and native DSD256 audio signal processing Professional audio amplifier circuit 1300mW+1300mW strong power Three-stage adjustable gain Specially designed low-noise power supply 6, 35mm+4.4mm dual headphone output High quality Emerald solid-state capacitors LCD display RGB logo illumination The new FiiO K11 R2R offers advanced FiiO proprietary R2R DAC technology and versatile connectivity for desktop audio enthusiasts. Fully differential 24-bit R2R DAC array FiiO has equipped the K11 R2R with its newly developed fully differential 24-bit R2R resistor array with four channels. It consists of 48 resistors per channel, totalling 192 high-precision, ultra-thin film resistors with an accuracy of 0.1% and low temperature drift between the four channels. Thanks to the specially designed audio circuit architecture, it promises a clean and sharp output with a dark background. NOS/OS dual operating modes The FiiO K11 R2R has two operating modes, NOS (non-oversampling) and OS (oversampling). These are freely switchable and offer dual sound characteristics with the device. In NOS mode, the original sampling rate is retained during signal processing, while in OS mode all signals are oversampled to 384kHz for processing. NOS mode results in a more musical presentation, while OS mode delivers more detail and clarity. Powerful amplifier section FiiO has equipped the K11 R2R with a professionally developed amplifier circuit. It consists of Ti OPA1642 as a low-pass filter and two SGM8262 operational amplifiers in professional quality. The K11 R2R has an output power of up to 1300mWx2, which is enough to drive even the most demanding headphones with ease. It features three-stage amplification modes that allow easy pairing with sensitive and power-hungry devices. The K11 R2R also utilises the precise NJW1195A digital volume chipset for accurate volume control with low distortion between channels. Two headphone outputs The FiiO K11 R2R has two headphone outputs. It consists of an unbalanced 6.35 mm connection and a balanced 4.4 mm output. You can easily pair different IEMs and headphones with the K11 R2R and enjoy high-resolution music in all its splendour. True high-resolution audio signal processing The FiiO K11 R2R supports the decoding of high-resolution audio signals. It offers full support for PCM and DSD signal processing with up to 32-bit/384 kHz PCM and DSD256 audio signals. For DSD256, the DSD output mode must be set to native. It is converted internally to PCM for R2R signal processing. Professionally developed low-noise power supply The FiiO K11 R2R has a professionally developed low-noise power supply. It consists of 17 low-noise LDO precision voltage regulator ICs and 2 DC-DCs that provide a multi-channel power supply. The external 12 V power supply ensures a clean output with low noise and low distortion. The K11 R2R delivers high quality sound to its users. SpecificationsDAC: fully differential true 24-bit R2R resistor arrays Main control chip: GD32F303RET6 Output 6.35mm single-ended L+R≥460mW+460mW (32Ω, THD+N＜1%) / L+R≥50mW+50mW (300Ω, THD+N＜1%) Output 4, 4mm balanced L+R≥1300mW+1300mW (32Ω, THD+N＜1%) / L+R≥220mW+220mW (300Ω, THD+N＜1%) Inputs: USB Type-C, Coaxial, Optical Outputs: 1 x 6.35 mm (single-ended) / 1 x 4.4 mm (balanced) / 1 x L/R RCA / 1 x Coaxial USB input decoding: PCM 384kHz/32-bit / DSD 256 Coaxial input decoding: PCM: 192kHz/24-bit Optical input decoding: PCM 96kHz/24-bit Line-Out (LO) mode Power-Out (PO) mode Display: 1.1-inch LCD VA segment display Adjustable RGB illumination Dimensions: 147 x 133 x 32.3 mm Weight: 420 g What`s in the box1x FiiO K11 R2R 1x power supply 1x USB data cable 1x quick start guide 1x 6.3 to 3.5mm jack adapter Differences - Fiio K11 vs. K11 R2R The most obvious difference between the R2R and the K11 lies in the chip used. It was originally built with a CS43198 ΔΣ chip. Delta Sigma chips are found in many lower-end DAC/AMPs as they offer high bit depth and high performance in terms of manufacturing costs. The price for this is that THD+N and noise are higher than with an R2R chip. For this reason, R2R chips are more difficult to manufacture and often much more expensive. Developing an R2R chip for a low-cost item is not an easy endeavour. Furthermore, the development of a high-resolution R2R chip that supports 384 kHz/24-bit is a new development that is not yet found in entry-level devices. To see R2R in a DAC/amplifier for under $200 is a miracle in itself. What is the difference between R2R and ΔΣ chips, theoretically you can achieve a warmer sound with most R2R DACs without sacrificing the transparency of the higher frequencies. Although the THD+N and noise floor of the K11 and K11 R2R are very similar, you still get less harmonic distortion, resulting in a more natural reproduction of the high frequencies.This means that the R2R has a warmer yet more transparent sound. Other changes include the NJW1195A volume control utilising a resistor ladder potentiometer, meaning a more controlled and consistent volume control. The output power of both units has not changed and you can still drive any headphones you could before. The inputs and outputs have also remained the same. And there is now an OS/NOS mode that allows you to faithfully recreate the waveforms. Summary Rather than just offering listeners a product with a new look, FiiO has decided to drastically improve the quality and internals of its entry-level DAC/AMP. Some companies remake products by sticking a label on them and investing in marketing to offer inferior products at the same price. This is not the case with FiiO, who have made some great technical improvements with the K11 R2R.

24-bit fully balanced R2R desktop DAC and headphone amplifier Fully differential true 24-bit R2R DAC resistor arrays NOS/OS dual modes 2400 mW + 2400 mW powerful output power LDAC Bluetooth DC/AC dual power supply 10-band high-precision PEQ Fully balanced audio amplifier circuit XLR+RCA preamp/line output Fully balanced true 24-bit R2R resistor arrayDAC FiiO's proprietary four-channel, fully balanced 24-bit R2R resistor array DAC consists of 48 precision thin-film resistors per channel, for a total of 192 resistors across four channels. Each resistor has an accuracy of 0.1% and low temperature drift (30 ppm). This R2R DAC gives the K13 R2R a uniquely rich and musical sound. The K13 R2R uses a fully differential architecture, which results in less noise and fewer FFT harmonics, resulting in a darker musical background. Two NOS/OS modes Twice the fun NOS mode (Non-Oversampling): Maintains the original sampling rate for decoding, preserving the authentic sound and giving you an organic and immersive music experience. OS mode (Oversampling): Upsampling to a high sampling rate of 384 kHz for superior audio performance and an even more refined, clearer sound. Preamplifier + power amplifier output Desktop decoding hub With a variety of inputs and outputs, this device functions as both a preamplifier and a power amplifier, catering to different listening preferences. It also supports PCM 384 kHz/24-bit and DSD256 decoding, allowing high-resolution audio signals to be processed effortlessly to deliver rich sound details and an outstanding listening experience. Ten-band high-precision PEQ Effortless sound optimization Thanks to the XMOS XU316 platform, the K13 R2R features a specially designed PEQ* with support for 10 frequency band adjustments in all operating modes. With FIIO's proprietary tuning algorithm, accessible via the app or web interface, you can easily use preset tunings such as “Retro PEQ” or even simulate and correct the frequency response curves of headphones. You can also export, import, share, and save EQ curves, making sound optimization a breeze. *PEQ can be used to adjust audio signals with a sampling rate of up to PCM 192 kHz/24-bit. **The web version of PEQ can be found at the following website: https://fiiocontrol.fiio.com/. The web version of PEQ is only supported for USB input. When using other modes, you can adjust the PEQ via the FIIO Control app. Fully symmetrical audio amplifier circuit The entire audio chain, including R2R DAC, LPF, volume control, and headphone amplifier, uses fully differential signal processing for excellent noise suppression, minimal distortion, and a high dynamic range. The amplifier circuit also features gain control, headphone protection mechanisms, and POP noise suppression for a robust and reliable listening experience. Specially designed DC/AC power supplies The built-in 30W switching power supply is protected by a nickel-coated shield cover, which significantly increases noise immunity and ensures a cleaner power supply. In addition, it has an external DC input*, so you can combine it with a more powerful linear power supply to achieve a different sound experience. *Supported external DC power supply: 12 V, 2.5 A (or more than 2.5 A). Multi-rail power supply, robust performance: With up to 18 low-noise LDOs and 5 DC/DC converters, this device features a multi-rail power supply that ensures a strong and clean power supply for exceptional audio output. Audiophile ELNA RA3 electrolytic capacitors: High-quality ELNA RA3 series audio silk film capacitors and special tantalum electrolytic capacitors work together to provide a pure, stable power supply to the device and deliver a warm, natural sound. Robust performance Every detail comes into its own With a balanced output power of 2400 mW + 2400 mW at a load of 32 Ω, the K13 R2R can effortlessly drive both high-fidelity IEMs and headphones, realizing their full potential and reproducing every detail. Excellent display Superior clarity A specially designed, high-contrast, durable HD LCD display* shows the current status of the device at a glance, including sampling rate, volume, gain, and output mode. *Durable LCD display, can remain on continuously without risk of burn-in.Minimalist design With technological elegance The reinforced aluminum alloy unibody chassis, combined with a brand-new “skylight” design, not only continues the minimalist design language of the K11 series, but also offers a literal technological insight into the R2R resistor series. The flowing light and vibrant colors emphasize the unique technical aesthetic. LDAC Bluetooth in high resolution Enjoy truly wireless hi-fiWith support for Bluetooth 5.4 and reception for LDAC/AAC/SBC codecs, the K13 R2R lets you immerse yourself in a world of high-quality music, even when playing wirelessly. Precisely engineered Perfect performance Three gain stages, three independent volume curves: Thanks to the different gain stages, the K13 R2R adapts better to different types of IEMs and headphones, ensuring a better listening experience. Overheating protection, overload protection: When abnormal operating conditions are detected, protective mechanisms are automatically activated to prevent damage to the device and increase safety. Adjustable RGB lighting: The RGB lighting not only indicates the current audio sampling rate, but you can also adjust the brightness, colors, and whether it pulses or not. 1-99 minute timer shutdown*: Convenient features that meet your needs.*The timer shutdown works once after each setting. Specifications Color: Black, Silver Main control chip (MCU): ESP32-S3 USB chip: XMOS XU316 DAC: Fully differential true 24-bit R2R DAC resistor arrays Volume control chip: NJW1195AV R2R and LPF operational amplifiers: 4x OPA1642 LO buffer operational amplifiers: 2x LTA8092 Headphone amplifier: 2x OPA1642 + 2x TPA6120A USB input: 384 kHz/32-bit, DSD256 Coaxial input: 192 kHz/24-bit, DSD64 Optical input: 96 kHz/24-bit USB port: Dual Type C Display: Custom LCD Power supply: AC 100–240 V, 50/60 Hz DC 12 V/2.5 A Dimensions: approx. 210 x 188 x 42 mm (including feet) Weight: approx. 980 g Single-ended output power 1: L+R ≥ 1220 mW + 1220 mW (32 Ω, THD+N < 1%) (32 Ω/SE/high gain) Single-ended output power 2: L+R≥150 mW+150 mW (300 Ω, THD+N＜1 %) (300 Ω/SE/high gain) Balanced output power 1: L+R≥2400 mW+2400 mW (32 Ω, THD+N＜1 %) (32 Ω/balanced/high gain) Balanced output power 2: L+R≥600 mW+600 mW (300 Ω, THD+N＜1 %) (300 Ω/balanced/high gain) Frequency response: 20 Hz to 80 kHzAttenuation < 2.9 dB SNR: ≥ 116 dB (A-weighted) Noise: PO < 9 uV (A-weighted); BAL < 18 uV (A-weighted) Output impedance: PO < 0.7 Ω (32 Ω load); BAL＜1 Ω (32 Ω load) THD+N: approx. 0.0173% (1 kHz/-6 dB at 32 Ω) What`s in the box1x K13 R2R 1x power cable 1x infrared remote control 1x USB data cable 1x headphone adapter 1x quick start guide 1x warranty card

Desktop DAC AMP headphone amplifier with two AK4497S Two AK4497S VELVET SOUND DAC chips Discrete Class AB transistor amplifier with 3000 mW + 3000 mW output power Fully symmetrical audio circuit from input to output Supports USB DAC (768 kHz/32-bit), DSD512, and full MQA decoding Bluetooth decoding with LDAC/AAC/SBC 10-band PEQ equalizer support for all digital inputs Dual master clock, Accusilicon crystal oscillator with extremely low phase noise Multi-core X2000 processor and ESP32-S3 MCU for a fast and smooth user experience Supports playback from USB storage devices, Roon Ready, AirPlay streaming Supports Wi-Fi 2.4/5 GHz Wi-Fi and Gigabit Ethernet Advanced thermal design and physical separation of power, digital, and analog boards3.93-inch touchscreen Infrared remote control Hi-Res Audio The FiiO K15 is a top-of-the-line desktop DAC and headphone amplifier that combines modern digital decoding and analog precision. Leading the new “Core” generation Two high-quality AKM DAC AK4497S The K15 is one of the first devices to use two of the new high-end AKM DAC chips AK4479SVQ with improved “VELVET SOUND” audio technology. The chips offer low distortion, a wide dynamic range, and extended signal bandwidth with low power consumption. Rich details are preserved in both the low and high frequency ranges, ensuring a natural and impressive sound experience. VELVET SOUND is a brand that embodies the sound philosophy of the new generation of AKM audio products. It aims to achieve “realistic sound reproduction” through the full utilization of audio technology and to provide an authentic and impressive sound experience without compromise. Discrete architecture Class AB transistor current amplifier circuit for headphones The K15 features a carefully developed discrete headphone amplifier circuit with an OP + transistor current amplifier design. A complementary pair of classic ON Semiconductor MJE243G/253G transistors delivers high current and low impedance. This discrete circuit can achieve a balanced output power of up to 3000 mW + 3000 mW, allowing the K15 to effortlessly drive both full-size headphones and in-ear monitors for a smooth, natural, yet melodious sound. Eight operating modes Streaming media: Enjoy a wide variety of streaming media sources via Roon Ready and AirPlay*. Local playback: Supports external USB storage** so you can listen to your private collection. Single-ended line input: Receives single-ended analog audio inputs and amplifies them with the K15. Balanced line input: Receives balanced analog audio inputs and amplifies them with the K15. USB DAC: XMOS 16-core XU316, supports 768 kHz/32-bit, DSD512, full MQA decoding***. Bluetooth decoding: Supports SBC/AAC/LDAC and other codecs. Optical decoding: Receives optical signal inputs and functions as an optical decoder. Coaxial decoding: Receives optical signal inputs and functions as an optical decoder. *Roon Ready certification is pending, please refer to the official announcement from FIIO. **The maximum current output of the USB-A port is 500 mA and is suitable for USB flash drives. If you want to connect a portable hard drive, you will need a separate power supply. ***Full MQA decoding is only available with USB input and EQ=OFF. MQA is not available in bypass mode and with EQ=ON. From DAC decoding to low-pass filtering and gain control to headphone amplification, the K15's audio circuitry is completely symmetrical. This design ensures a wide dynamic range while effectively reducing crosstalk, minimizing noise, and improving audio output quality. Physically separated circuit boards The internal power supply, digital, and analog sections are each located on separate circuit boards, physically preventing crosstalk. This effectively ensures the precision and integrity of the processed audio signals and delivers pure, high-quality sound. Precisely engineered power supply DC/AC dual power supply The K15 features an integrated, low-noise, highly efficient, long-life, next-generation 30 W (12 V-2.5 A) power supply of industrial and instrument quality. The K15 also supports external DC power supplies*, allowing it to be powered by more powerful linear power supplies for even better sound quality. *External DC power supplies with 12 V-2.5 A are supported Ultra-wide input voltage range (85 to 305 VAC) Operating temperature -40°C to 85°C 500,000 hours of ultra-high reliability Separate power supplies for digital and analog sections This design helps to effectively prevent crosstalk between the digital and analog sections of the audio circuits by ensuring better power isolation and improved noise rejection capabilities. Multi-stage analog power supply The analog section features a precisely segmented multi-stage power supply, including stages for digital-to-analog conversion, LPF, and transistors. The power supply uses up to 14 linear regulators with low voltage drop to ensure a continuous supply of stable and pure power. Precisely restored signalsEvery little detail can be heard 2 Accusilicon femtosecond audio quartz oscillators with low phase noise The K15 features the industry-leading ACCUSILICON quartz oscillator AS318-L (45.1584 MHz, 49.1520 MHz) with extremely low phase noise, which effectively reduces phase noise in audio signals. This ensures precise reproduction of audio signals at various sampling rates and thus a purer and more stable sound. High-quality components Everything for sound 2 Nichicon 3300uF audio capacitors + 4 ELNA MILIC II capacitors + 8 ELNA RA3 audio capacitors Better sound quality with a better sound stage. 8 ruby film capacitors + 32 wafer resistors Low temperature drift, low noise, consistently stable sound quality in both hot and cold environments. High-quality beryllium capacitors Ultra-low ESR value, strong interference suppression for a stable and pure power supply.4 sets of silver-plated, oxygen-free copper interconnect wires The various circuit boards are connected with silver-plated, oxygen-free copper wires to ensure high-resolution signal transmission with minimal loss. Two master coresStable and smooth experience High-performance multi-core processor X2000: This processor is based on a unique design with two XBurst@2 cores + XBurst@0 micro-core and offers exceptional computing power with extremely low power consumption. This ensures precise audio signal processing and guarantees stable and smooth music playback. Efficient MCU ESP32-S3: This chip integrates a powerful Xtensa 32-bit LX7 dual-core processor and an extremely power-efficient coprocessor with a clock speed of up to 240 MHz. This chip enables precise system control for a highly efficient and fast user experience. A harmonious fusion of angular and rounded Brilliance in design The K15 features FIIO's signature design, which combines angular and rounded elements to blend retro elegance with cutting-edge technology. Carefully designed with both functionality and aesthetics in mind, it features convenient screen controls and multiple rotary knobs for smoother operation. In addition, the grid structure improves heat dissipation – all of which underlines the brilliance of its thoughtful design. Touch control Button control Remote control FiiO Control app connection 10-band high-precision PEQ Unlimited fun All digital inputs on the K15 support PEQ adjustment*. Thanks to FIIO's proprietary setting algorithm and user interface, you can precisely adjust the sound to your liking by simulating and modifying the frequency response curve of the headphones. * Digital inputs include USB, coaxial, optical, Bluetooth, streaming media, and local playback. *Web PEQ location: Top bar of the FIIO website – Support – Web-based PEQ settings Multiple protection systems Worry-free listening Not only has the device undergone rigorous testing in FIIO's laboratories, but it also features various protection systems that intelligently detect abnormal conditions and take appropriate measures to protect you and prevent damage to the device. Amplifier temperature detection Overvoltage protection OVP Output overload detection DC output protection Overcurrent protection for the power supply Wired or wireless Always a stable connection The Gigabit Ethernet port supports fast and stable wired data transfers, while the AP6256Wi-Fi module supports 2.4 and 5 GHz wireless networks as an additional option for stable transmission of lossless audio data. Versatile application options Scenario 1: USB decoding Scenario 2: Streaming media (Roon or Airplay) Scenario 3: Local playback Scenario 4: Optical/coaxial decoding Scenario 5: Single-ended/balanced line input Scenario 6: Bluetooth decoding Connections and inputsUSB-C input (XMOS xU316) Coaxial and optical digital inputs Balanced and unbalanced line inputs USB-A storage input Gigabit Ethernet + dual-band Wi-Fi SpecificationsDAC chip: Two AKM AK4497S USB decoding: 768 kHz/32-bit, DSD512, full MQA decoding Bluetooth: LDAC, AAC, SBC (to be confirmed) Output power: 3000 mW + 3000 mW with balanced output Clock Accusilicon: AS318-L (45.1584 MHz & 49.1520 MHz) PEQ support: 10-band PEQ on all digital inputs Streaming: AirPlay, Roon Ready Processor: X2000 dual-core + ESP32-S3 MCU Power supply: 30 W internal power supply (12 V/2.5 A) + DC input support Operating temperature: -40 °C to 85 °C Network: Gigabit Ethernet, dual-band Wi-Fi (2.4 GHz and 5 GHz) Basic specifications and parameters Color: Black/silver Dimensions: approx. 244.6 x 213 x 66.8 mm Weight: approx. 2100 g Hardware configurations Master control: X2000, ESP32-S3 DAC: AK4497S*2 USB: XMOS XU316 Headphone amplifier transistor: MJE243G/253G Display: 3.93-inch LCD Bluetooth specifications Bluetooth reception: Bluetooth 5.1, SBC/AAC/aptX/aptX LL/aptX HD/atpX Adaptive/LDAC Decoding specifications USB DAC: 768 kHz/32-bit; DSD512 (native) Coaxial input: 192 kHz/24-bit; DSD64 Optical input: 96 kHz/24-bit Local playback: 384 kHz/32-bit; DSD256 Streaming playback: 384 kHz/32-bit; DSD256 (DOP) Headphone outputs Output power 1: L+R ≥ 1400 mW + 1400 mW (32 Ω SE, THD+N <1 %, ultra-high gain mode) Output power 2: L+R ≥ 3000 mW + 3000 mW (32 Ω BAL, THD+N <1 %, ultra-high gain mode) Output power 3: L+R ≥ 180 mW + 180 mW (300 Ω SE, THD+N <1 %, ultra-high gain mode)Output power 4: L+R ≥ 700 mW + 700 mW (300 Ω BAL, THD+N <1 %, ultra-high gain mode) Line outputs RCA output: L+R=2.4 Vrms+2.4 Vrms (1 kHz at 10 kΩ) XLR output: L+R=4.8 Vrms+4.8 Vrms (1 kHz at 10 kΩ) Audio parameters Frequency response: 20 Hz to 80 kHz, attenuation < 2.8 dB SNR: ≥ 122 dB (A-weighted) Noise: < 5.3 μV (A-weighted) THD+N: < 0.00054 % (1 kHz/-12 dB at 32 Ω) What`s in the boxK15*1 Power cord*1 USB data cable*2 Headphone plug adapter*1 Remote control*1 Fuse*1 XLR4 decorative plug*1 Battery*2 (only for China, England, and Japan) Quick start guide*1 Warranty card*1

Hifi-Audio Mechanical Keyboard QWERTZ German layout Gasket-mounted design for a comfortable feel Hot-swappable keys for quick change of mechanical keys Dual OS support for Windows and Mac Dual CS43131 DACs for superior audio quality 550 mW high output power, comparable to desktop amplifiers 3.5 mm SE and 4, 4 mm headphone jacks Patented design that integrates music listening and typing RGB lighting, multiple preset dynamic lighting effects Where down-to-earth meets musicality Meet the FiiO KB3 HiFi mechanical HIFI audio keyboard - the place where audiophiles and mechanical keyboard enthusiasts meet. With features such as a seal-mounted design and 32-bit/384 kHz PCM audio playback, this keyboard-DAC combo is a complete solution for music, typing and gaming. And all in a German layout created especially for us! High-quality sound Hear the difference Two CS43131 DACs are at the heart of the KB3, transforming it from an ordinary keyboard into a true music machine. Combined with an output power of 550 mW, it rivals a 550 mW desktop amplifier and ensures that your headphones sound loud and clear. Wide range of connection options Plug-and-play Thanks to the 3.5 mm SE and 4.4 mm dual headphone sockets with balanced jack, you benefit from wide compatibility with different headphones and a plug-and-play experience. Gasket-mounted design Comfort with every click The shock-absorbing keyboard provides a comfortable, cushioned feel with every keystroke, making long typing sessions a breeze. Hot-swappable keys Customise the way you type Flexibility is at your fingertips with hot-swappable switches. Switch effortlessly between clicky, linear and tactile switches, making this keyboard a great choice for experimenters and tinkerers. Dual operating system support Versatile and productive Whether you're a Windows fan or a Mac user, the FiiO KB3 HifFi has something for everyone. Dual operating system support ensures unhindered productivity across different operating systems, making it a flexible choice regardless of your setup. Gateron G Pro 3.0 yellow switches Ready for high performance The FiiO KB3 HiFi comes with Gateron G Pro 3.0 yellow switches, a set of smooth and quiet linear buttons. These all-rounders are perfect for gaming, typing and programming. And because they're linear, they're perfect for the office and shared spaces. Wired HiFi edition HiFi functionalityEnjoy the full HiFi audio experience with integrated DACs. Full inputs/outputs: Equipped with all the necessary connections for comprehensive connectivity.

Desktop R2R tube preamplifier and DAC USB/OPTICAL/COAXIAL inputs RCA+XLR line inputs Fully differential, true 24-bit R2R resistor array DAC Four JJ Electronic E88CC tubes 46W low-noise, linear power supply with low ripple Dual-channel, mechanical VU meters with LED backlighting WARMER R2R Opt for a richer sound The ultimate setup for a warm sound The WARMER R2R is inspired by the legacy of the timeless Hong Kong band The Wynners. As the name suggests, the WARMER R2R DAC aims to give music an invitingly warm and beautiful tube sound. From the mesmerizing vibrations of the vintage VU meters in warm tones to the golden combination of R2R DAC and vacuum tubes, the WARMER R2R lets you feel the warmth of the music in every listening experience. This is an R2R DAC + tube preamplifier Extensive inputs and outputs Flexible connection with other systems USB/optical/coaxial inputs: Connect your smartphone, computer, digital music player, CD player, and more, and easily switch between inputs with a rotary knob. RCA and XLR line outputs: Connect speakers, amplifiers, DACs, and headphone amplifiers, with simultaneous output supported via both outputs. Uniquely fascinating Proprietary, fully differential, true 24-bit R2R resistor array DAC The star of the show is FIIO's proprietary fully differential 24-bit R2R DAC from FIIO, which is built with a total of 192 high-precision thin-film resistors (48 per channel) and has an accuracy of 0.1% and an extremely low drift of 30 ppm. This gives the WARMER R2R its distinctive, fascinating sound. Opt for a richer taste Four JJ Electronic E88CC tubes The tube buffer stage is powered by four brand new JJ Electronic E88CC tubes from Slovakia. The tubes are powered by a ±28V high-voltage power supply and feature a long life of 10,000 hours. The core circuitry of the classic tube buffer preamplifier has been optimized to achieve a sweet, organic tube sound that adds a delightful richness and fullness to your music. *Founded in 1993, JJ Electronic is a world-renowned manufacturer of vacuum tubes, electrolytic capacitors, and premium audio amplifiers. JJ tubes and capacitors are very popular in high-end audio and guitar amplifiers and are often used in guitar and audio amplifiers, recording studio equipment, and audio devices. Radiant vibrancy Extra-large dual-channel LED-backlit analog, true mechanical VU meters The true mechanical VU meter with retro backlighting in warm tones is powered by a dedicated IC. When the music plays, the meter moves harmoniously with it, immersing you in your own exclusive music party. Don't just hear music, see and feel it too. Pure, clear sound 46 W low-noise, linear power supply with low ripple The device uses a 46 W linear transformer with low noise and low frequency. Toroidal transformers have inherent advantages: The toroidal transformer made of non-oriented silicon steel strips offers high efficiency and low eddy current losses, while the corner-free coils result in a more uniform magnetic field and less dispersion. Thanks to this power supply, the WARMER R2R is supplied with clean energy, enabling it to produce a flawless, unadulterated sound. Minimalist vintage look Reliable heat dissipation Like the K series of desktop audio devices, it features a classic square and round design. This design seamlessly combines vintage charm with minimalist aesthetics and demonstrates a careful consideration of function and form. The grille design allows for faster heat dissipation and ensures that the device delivers stable, high-quality audio for years to come. Twice the fun NOS/OS modes NOS mode (Non-Oversampling): Decodes while maintaining the original sampling rate and offers the appeal of pristine, original sound. Enjoy a pure, captivating music experience. OS mode (Oversampling): Global oversampling to a sampling rate of 384 kHz for better audio performance and a more detailed, clearer sound. Wide compatibility Supports UAC1.0/2.0 Switch between UAC1.0/2.0 modes with a simple lever operation. Easy connection for plug-and-play use with devices such as computers, Switch, PS5, players, and smartphones. Say goodbye to limitations in your music world. Various use cases M21+WARMER R2R+K15+FT13 iPad+WARMER R2R+K17+FT7 TV+WARMER R2R+SP5

Tube phono preamplifier for turntables Exceptionally Low Noise Level Converts phono signals into line-level signals with low-noise integrated circuits and high-quality components, eliminates low-frequency interference and ensures clear sound quality. With earth connection to protect your turntable. Three Gain OptionsWith its three switchable gain modes: 39, 42 and 45 dB, this phono preamplifier allows precise adjustment of volume and sound quality for optimal indoor use. Whether you're enjoying your vinyl collection in a quiet study or a lively living room, you'll find the perfect gain setting to enhance your listening experience. Exchangeable Tubes This tube phono preamplifier delivers an exceptionally warm and smooth sound and is compatible with various models of vacuum tubes such as 6K4, 6J1, 6J4, GE5654, 6AK5 and 66. Customise your audio system by simply swapping vacuum tubes to explore and enjoy unique sound profiles as different tubes produce different audio characteristics. Versatile Audio ConnectivityThe BOX X2 tube phono preamplifier offers an MM turntable input and 3.5mm RCA/AUX options for various audio inputs. With a dedicated RCA line output for active speakers, you can connect a power amplifier via the RCA output and then connect passive speakers for an immersive audio experience What`s in the boxBox2 Phono Preamplifier x 1 Vacuum tubes x 2 12V 1.5A power adapters x 1 RCA cable x 1 User manual x 1

Tube phono preamplifier and headphone amplifier Phono preamplification Improved audio quality Versatile connection options The updated version for BOX X2, next generation phono preamplifier for unrivalled sound quality. Enhance your vinyl listening experience with the Fosi Audio BOX X4 phono preamplifier. This compact device acts as a bridge between your turntable and your sound system, amplifying the weak signal from your turntable to a level that is compatible with your amplifier or receiver. So you can realise the full audio potential of your records and be sure to hear every detail. JAN 5654W Tube MM Phono Preamplifier The BOX X4 Phono Preamplifier supports 3.5mm AUX and MM turntable inputs and converts phono signals to line-level signals with low-noise integrated circuits and high-quality components to remove low-frequency noise and ensure clear sound quality. With an earth connection to protect your turntable. Tube headphone amplifier and phono preamplifier The BOX X4 is equipped with a 3.5mm AUX headphone and RCA output, which is extremely useful beyond imagination. Variable vacuum tube model 6K4 / 6J1 / 6J4 / GE5654 / 6AK5 / 66 vacuum tubes etc. You can replace the vacuum tubes to tune your stereo system to your own taste, different tubes provide different sounds. Phono pre-amplification Amplifies the weak signal from your turntable to a level compatible with your amplifier or receiver, allowing you to hear the full audio potential of your records. Improved audio quality High-quality components and low-noise circuitry minimise unwanted noise and ensure a clear and detailed sound. In addition, bass and treble controls allow for customised sound adjustment. Versatile connection options Provides a variety of connection options, including an MM turntable input, a 3.5 mm AUX input, RCA line outputs and a 3.5 mm headphone jack, ensuring compatibility with various audio setups. What`s in the box BOX X4 phono preamplifier 12 V DC power supply Operating instructions

Phono Preamplifier MM & MC Cartridge Compatibility 4 Gain Settings: 38-66dB Precision Audiophile Components Aluminum Alloy Chassis One-Touch Power & Cartridge Switch Embracethe Vintage Charm of Vinyl with Modern Precision Supporting MM/MC cartridges, BOX X5 is compatible with most turntables, along with 4 adjustable gain levels of 38/48/56/66 dB. It utilizes high-precision capacitors and resistors, ensuring minimal noise for audio purity. Intuitive RCA terminals achieve a plug-and-play experience. Input: MM/MC RCA; Output: RCASNR≥92dB; THD≤0.009% Frequency Response: 20Hz-20kHz(±0.015dB) High PerformanceThe BOX X5 phono preamp is compatible with both MM and MC cartridges, featuring 4 gain settings and an excellent precise RIAA equalization to provide a clean, direct pass-through of a signal when paired with your turntable.Audiophile-Grade ComponentsThis preamp utilizes a variety of materials such as 2% Precision Polyester Film Capacitors, Green Sleeve Copper Lead Audio Capacitors, 0.1% High-Precision Film Resistors, OPA1612 Op-Amp, Gold-Plated RCA Jacks, and more.It picks up subtle and finite detail produced from it and delivers a truly warm and inviting sound.Multiple Gain Settings With 4-Level gain adjustment Asettings of 38/48/56/66dB, the preamplifier accommodates both MM & MC cartridge types, meeting a variety of needs. This enhances your phono stage and helps in rebuilding the vintage stereo sound.Mini and ExquisiteIt's built around a minimalist yet functional design featuring an all-aluminum alloy chassis. When paired with the V3 stereo amplifier, the BOX X5 can bring out the best in your vinyl playback, enhancing its frequency response and dynamic performance.User Friendly DesignIt has an easy-to-use one-touch power button, gain control, and a convenient toggle switch to switch between MC and MM cartridges. In addition, the grounding port ensures that the connection is secure. Specifications Input Mode: MM+MC RCA Output Mode: RCA THD: ≤0.009% SNR: ≥ 92dB Device Dimension: 4.1 x 6.5 x 1.4 inches Power Supply: 16V/1A What‘s in the box？ BОX X5 Phono Preamp x 1 16V 1A Power Adapter x 1 User’s Manual x 1

Tube headphone amplifier Pure tube amplification Adjustable impedance and bass and treble control 2-in-1 headphone amplifier and preamplifier Supports headphones with an impedance of 16-300 Ω Vintage charm meets modern precision The GR70 is a headphone amplifier and preamplifier in one. Thanks to the many headphone connections and RCA inputs/outputs, you can easily integrate this tube preamplifier into your home audio system. Pure tube amplification: The GR70 headphone tube amplifier combines vintage charm with modern technology and delivers authentic tube sound.It's perfect for headphone fans and pairs perfectly with over-ear and in-ear headphones for premium sound. Quad tubes: Features two 5654W and two 6Ж4 vacuum tubes for two-stage amplification. The 5654W tubes increase the voltage, while the 6Ж4 tubes provide the power amplification. This configuration ensures a balanced, transparent and structured sound. User-friendly design: This tube headphone amplifier features intuitive controls, including a large volume knob, dual-sided vents, bass and treble controls, and high/low impedance mode switching, making it versatile. Two in one: It supports low and high impedance mode switching to connect 16 Ω to 300 Ω headphones and features 6.35 mm/3.5 mm headphone jacks on the front and RCA inputs/outputs on the rear for integration into home hi-fi systems. Compact and powerful: Made from CNC machined aluminum alloy, the GR70 is both robust and elegant. Despite its compact size, it delivers an output power of up to 300 mW and a 1.2 V RCA output with a signal-to-noise ratio of ≥97 dB - for a warm, clear and dynamic sound. SpecificationsInput - RCA Output - RCA, 6.35 mm/3.5 mm headphone output Power input - DC 12 V/3 A Maximum output power - 300 mW at 32 Ω Headphone impedance: Low mode: 16 Ω-120 Ω, High mode: 120 Ω-300 Ω SNR - ≥97 dB THD: RCA output ≤0.26 %, headphone output ≤0.5 % Frequency range - 20 Hz - 20 kHz (±1 dB) What`s in the boxGR70 main unit *1 6AC7 vacuum tubes *2 5654 vacuum tubes *2 Tube protection covers *2 12 V/3 A power supply *1 Operating instructions

Gaming HiFi DAC/Headphone AMP Flagship chipset Sound adjustment Balanced output Shortcut buttons Two rotary controls 1.5-inch LCD display Versatile DAC amplifier: The K7 is designed for both hi-fi headphones and music lovers. It can serve as a powerful control center for your desktop audio system. Whether you enjoy music, play or work, the K7 handles it all with ease. Audiophile chipset: Equipped with the AK4493S DAC, the XMOS XU208 USB processor and the TPA6120 headphone amplifier, the K7 supports high-resolution decoding up to PCM 384kHz/32bit and DSD256. With an output power of up to 2100 mW, it can easily drive even the most demanding headphones. Comprehensive connectivity:Supports USB-C, coaxial, optical, Bluetooth aptX HD/LL and 3.5 mm microphone input. Outputs include 4.4 mm balanced, 3.5 mm unbalanced and RCA - for easy connection to headphones, powered speakers or amplifiers for desktop setups. User-friendly design: Compact and easy to use, the K7 features two large control knobs, five shortcut buttons and an angled housing for ergonomic comfort. A high-resolution display shows the status in real time and makes operation simple and intuitive. Durable all-metal construction: Made of solid aluminum alloy, the K7 has a robust, wear-resistant housing with a smooth metal finish and improved shielding against electromagnetic interference. SpecificationsChipset: XMOS XU208+AKM4493SEQ+QCC 3031+TPA6120 Maximum sampling rate: USB:PCM 384kHz-32bit/DSD256, Optical: PCM 24bit/192kHzCoaxial: PCM 24bit/192kHz, Bluetooth:PCM 24bit/48kHz Headphone impedance: 16-300Ω Input: Coaxial, Optical, USB-C, Bluetooth, 3.5mm Microphone Output: RCA, 3.5mm single-ended, 4.4mm balanced Firmware upgrade: XMOS firmware can be upgraded via the Type-C interfaceBluetooth version: 5.0 Bluetooth connection distance: ≤13m Noise floor: ≤2.5μV Bluetooth transmission audio format: SBC, AAC, aptX, aptX HD, aptX LL Input voltage and current: DC 12V 2AUSB compatible devices: Windows 7, 8, 8.1, 10, 11 (driver required)Mac OS X, Linux (no driver required) Audio parameters 4.4 mm balanced headphone output Rated output power: L+R≥2100mW+2100mW (32Ω/THD+N＜1%) SNR: 121dB THD+N: <0.0002% Dynamic range: 121dB Noise floor: ≤ 6.5μV 3.5mm headphone output (single-sided) Rated output power: L+ R≥600mW+600mW (32Ω/THD+N<1%) SNR: 122dB THD+N: 0.0005% Dynamic range: 121dB Noise floor: ≤2.5μV Frequency response: 20Hz-20kHz (±0.1dB) RCA output Output level: ≥2Vrms SNR: 20Hz-20kHz (±0.1dB) THD+N: 0.0005% Dynamic range: 121dB Noise floor: ≤3μV Frequency response: 20Hz-20kHz What`s in the box1x Fosi Audio K7 1x USB-A/C to USB-C cable 1x Bluetooth antenna 1x Power supply 1x 3.5mm headphone splitter 1x User manual

Tube Integrated Bluetooth Amplifier with DAC and VU Meter All-in-One DAC Amp/Headphone Amp Replaceable vacuum tubes 6AK5, 6AK5W, 6Zh1P, 6J1 Mini VU Meter: Classic Retro Vibe Remote ControlAll-in-One DAC Amp/Headphone Amp The MC331 supports one analog and four digital input modes, ensuring compatibility with a broad range of audio sources. It also boasts a pre-out port, facilitating easy setup of a 2.1 system. The VU meter and vacuum tubes add a touch of retro flair, delighting audio enthusiasts with both visual and auditory pleasure. All-in-One DAC Amp: A DAC, amplifier, preamplifier, and headphone amplifier are all integrated into the Fosi Audio MC331. You can easily switch between audio sources with the help of the remote control, ensuring a seamless and enriched listening experience. Amazing Combination: As an integrated tube DAC amp with a VU meter, the visual aesthetics of the 5654W vacuum tubes and VU meter add a nice warm and soft effect to not only the appearance but the sound as well, giving the modern look a retro feel. Setup Flexibility: It supports Bluetooth, USB, coaxial, optical, and RCA inputs, making it compatible with a variety of sources such as computers, phones, CD players, turntables with built-in phono preamps, etc., allowing you to build various systems. Compact Yet Powerful: The MC331 only takes up minimal desktop space but boasts a maximum power output of 105W x2@4Ω, effectively driving your bookshelf speakers. Additionally, it has a pre-out and a 3.5mm headphone output, making it versatile enough. User-Friendly Design: The MC331 comes with a remote control, allowing you to adjust bass and treble from the comfort of your listening chair. Its replaceable tube design lets you customize the sound signature to suit your personal preferences.MAX Power Output: 105W×2@4Ω Input Mode: Bluetooth +RCA +USB +COA+OPT Output Mode: Passive Speakers Output, Pre-Out, 3.5mm Headphone Output THD: ≤0.03% SNR: ≥100dB Device Dimension: 10 x 2 x 2.7 inches Terminating Impedance: 4-8 Ohm Power Supply: 24V/4.5A What‘s in the box？ MC331 Power Amplifier x 1 24V/4.5A Power Adapter x 1 Remote Control x 1User’s Manual x 1

2.1 Channel Integrated Amplifier with DAC, VU Meter and Bluetooth All-in-One DAC Amplifier High Power with Great Sound 5 input modesBass and Treble Controls Mini VU Meter - Classic Retro Vibe All-in-One Multifunctional DAC Amplifier Fosi Audio is dedicated to "redefining HiFi with unmatched value." Inspired by audiophile feedback, we introduce the MC351, a pioneering power amplifier blending decoding and amplification, catering to diverse HiFi needs. Its classic meter design and dynamic pointer movement evoke nostalgia. All-in-One DAC Amplifier: The MC351 integrated amp features high-resolution decoding capabilities, supporting Bluetooth, USB, Optical, and Coaxial digital inputs. With its extensive input and output options, you can easily set up a 2.1 home theater or other stereo HiFi audio systems. High Power with Great Sound: Equipped with two high-end Texas Instruments TPA3255 Class-D amplifier chips and a 100-fin heatsink, the MC351 can stably output up to 165W x 2 + 350W power in a 2.1 channel setup. The dual PCBA separated design ensures that the input and output signals do not interfere with each other, providing you with the purest and most impeccable sound quality. User-Friendly Control Design: Supports one-touch switching between 5 input modes and includes bass and treble controls, with central detents for tone defeating, for easy sound customization. It also features an automatic standby function, entering standby mode after 2 minutes of no signal input to effectively reduce power consumption. Vintage Charm: The eye candy round mini VU meter adds a classic retro vibe to your sound system. The needle of the level meter will dance to the music, providing you with both visual and auditory enjoyment. The MC351 is an excellent companion for turntables, allowing you to relive classic tracks.Exquisite Craftsmanship: Featuring an all-aluminum-alloy CNC integrated design and a finely sandblasted metal finish, the MC351 boasts a seamless body with no visible screws, showcasing minimalist aesthetics and the all-metal body ensures durability. Specifications Output Power: 165W x 2 + 350W @ 4Ω Terminating Impedance: 4-8Ω Input Mode: Bluetooth 5.3+RCA+COA+OPT+USB Output Mode: SPK OUT+SUB OUT+3.5mm PRE OUT Frequency Range: 20Hz - 20KHz(±0.1dB) THD: ≤0.03% SNR: ≥100dB Device Dimension: 13.82 x 9.21 x 3.62 inches DC Input Range: 24-48V Sampling Rate: USB24bit/96kHz ; OPT/COA 32bit/192kHz Power Supply: 32V/5A, 48V/5A What‘s in the box？ MC351 Power Amplifier x 1 32V/5A Power Adapter x 1 User’s Manual x 1

Hifi Stereo PreamplifierTriple RCA inputs Bass, treble, and gain controls Motorized knob for smooth adjustment Bypass function for a pure signal path Operational amplifier rolling: SS3602, MUSES02, OPA2134PAAnother Masterpiece Driven by Voice of Customers The P4 is a mini preamp self-developed by Fosi Audio based on extensive feedback from users worldwide after the launch of the V3 stereo amp. Mini Control HubThe P4 supports up to 3 RCA inputs, allowing easy connection to CD players, streamers, DACs, cassette decks, and turntables with built-in phono preamp. Switch between sources with a click for seamless audio control. Practical and User-FriendlyEquipped with volume control, bass and treble adjustment with bypass function, three-level gain control, and a remote. The preamplifier offers convenient audio setup and optimization, making every listening session effortless. Motorized PotentiometerFeaturing a high-precision motorized analog pot, the P4 delivers smooth volume adjustment, reduced noise, and minimal distortion for a purer and more refined sound experience. Compact and SolidThe P4 stereo preamp features a sleek, minimalist design that saves space and provides robust resistance to electromagnetic interference, ensuring reliable performance over time. Exceptional PerformanceWith a low noise floor, high signal-to-noise ratio, and extremely low distortion, the P4 pre-amplifier delivers pristine audio, ensuring accurate sound reproduction and enhancing the listening experience for audiophiles.Specifications Channel: 2.0 Input Mode: RCA*3 Output Mode: RCA, Pre-out SNR: ≥ 110dB Dynamic Range: ≥ 110dB THD+N: ≤ 0.003% Crosstalk: ≥ 105dB Noise Floor: ≤ 9μV Tone Adjustment Gain: ±12dB Frequency Response: 20Hz-20kHz(±0.1dB) Power Supply: DC 12V/1.5A What‘s in the box？ Fosi Audio P4 Mini Preamplifier x 1 12V/1.5A Power Supply x 1 User’s Manual x 1

5-Channel Headphone Splitter AmplifierFive-Channel Independent Amplification Independent Level Controls for Each Channel Live Real-Time Monitoring One-Touch Mute The PH05 is a high-performance five-channel headphone amplifier that utilizes the Texas Instruments NE5532 operational amplifier chip, relying on high-quality capacitors, inductors, and resistors to achieve stable and pure high-fidelity audio output. The PH05 features five 3.5mm audio output ports, allowing for powering up to 5 pairs of headphones and up to 5 independent volumes, with outstanding audio quality. Each channel provides a rated output power of 310mW (32Ω load), and the five output channels can independently adjust the volume, ensuring consistent sound quality even with headphones of various impedances. The PH05 also features a one-touch mute function for quick and convenient switching. Designed specifically for audiophiles, this compact headphone amplifier is sure to provide you with a true HiFi music experience.

Desktop DACVersatile Mini DAC: Ideal as a compact desktop external digital-to-analog converter for your streamer, CD player, computer, TV, or tablet, connecting seamlessly with home audio amplifiers, headphone amps, or powered speakers for exceptional sound quality. Audiophile-Grade Chipset: Equipped with the AKM AK4493S DAC, XMOS XU316 audio processor, and OPA1612 op-amp, supporting maximum sampling rates of PCM 32bit/768kHz and DSD512. Enjoy crystal-clear audio for a truly immersive listening experience. Comprehensive Connectivity: Features Optical, Coaxial, and USB inputs, as well as RCA and Sub-Out outputs, seamlessly connecting to PCs, Macs, TVs, CD players, tablets, and more digital sources. Simple plug-and-play setup makes integration effortless. Compact and Solid: Crafted from high-quality aluminum alloy, this compact DAC is stylish, durable, and space-saving. Its sleek profile effortlessly blends with any desktop environment, keeping your setup neat while adding a sophisticated touch. Superior Performance: Delivers an impressive 121dB signal-to-noise ratio, ultra-low distortion of 0.00012%, and outstanding dynamic range of 121dB—matching or surpassing higher-priced DACs, putting audiophile-grade sound easily within your reach.User-Driven: Pure HiFi DAC Crafted with Audiophile Precision The Q6 is a mini DAC engineered to meet the sophisticated demands of audiophiles. Drawing from extensive user feedback, it integrates precision engineering with high fidelity to ensure unmatched audio purity. Custom-made for those who seek exceptional clarity and depth, the Q6 stands as a testament to our commitment to quality and innovation in HiFi technology. Specifications Chipset: XMOS XU316 + AK4493 + OPA1612 + NE5532DR Input: USB Type-C, Optical, Coaxial Output: RCA, Sub Out PC-USB supports input sampling rate: Up to 32Bit/768kHz, DSD512 Optical/Coaxial supports input sampling rate: Up to 32Bit/192kHz THD: <0.00012% SNR: ≥121dB PC-USB support operating system: XP/W8/W10/MAC/linux Power Supply: 5V 2A What‘s in the box？ Fosi Audio DAC-Q6 *1 2-in-1 USB Type-A/C to Type-C Cable *1 USER MANUAL *1

Mono power amplifier for passive speakers Ideal for subwoofers or minimalist setups Balanced XLR input RCA input with 25dB and 31db Texas Instruments TPA3255 amplifier chip A variety of input options RCA, XLR and TRS connectors Innovative design for heat dissipation Impressive output power Powerful sound in a compact size Automatic standby mode after 10 minutes 48V-5A power supply supplied The Fosi Audio V3 MONO is a compact, powerful yet affordable 1-way amplifier. Based on a TI TPA3255 amplifier chip, it can deliver up to 240W at 4Ω. In addition, this amplifier is equipped with a variety of audiophile-grade components, such as Japanese and German Elna and Wima capacitors respectively, or a duo of DIP8-mounted TI NE5532 OPAs that you can swap out if you want a specific sound colouration. In terms of connections, the Fosi Ausio V3 offers a balanced XLR/jack combo input, an RCA input and a speaker connection for the output. Noise and distortion-free amplification The V3 mono amplifier benefits from PFFB technology, an advanced feedback design that significantly reduces distortion, improves linearity and increases efficiency. It also solves a structural problem of Class D amplification by eliminating the load dependency inherent in this technology. In addition, the aluminium housing isolates the power supply from the amplifier section, preventing crosstalk. A flexible amplifier The V3 amplifier is designed to be integrated into various configurations. For example, you can easily switch between RCA and XLR inputs using the switch on the front. You can also adjust the gain of the RCA input between 25 dB and 31 dB. And if you want a different sound colour, you can swap the TI NE5532 OPAs via DIP8 mounting. A revised cooling system To prevent overheating and thus ensure the longevity of the amplifier, Fosi Audio has developed an innovative ventilation system in addition to the traditional heat sink on the amplifier chip. The ventilation system is designed to prevent the ingress of dust without compromising cooling, ensuring impeccable sound quality combined with increased reliability. What`s in the box1x V3 Mono AMP 1x 48V 5A power supply 1x operating instructions

Fully balanced desktop DAC High performance ES9039Q2M chip XLR output / Trigger In/Out Op-Amp rolling: SS3602, MUSES02, OPA2134PA Perfectly matched to ZA3 amp Flagship desktop DAC: A fully balanced digital-to-analogue converter preamplifier with multiple inputs and outputs. The first Fosi Audio DAC to support HDMI ARC input and equipped with a high-performance ES9039Q2M chip that delivers rich and superior sound. Premium chipset: The ZD3 features a chipset consisting of XMOS XU316+ES9039Q2M+QCC3031+LME49720. It supports high-resolution audio with a maximum capacity of DSD512 and PCM 32bit/768kHz sampling rates, offering unparalleled clarity and depth. Versatile and flexible: The ZD3 offers extensive connectivity options and supports inputs such as Bluetooth, USB, OPT, COAX, HDMI ARC and balanced XLR/RCA outputs. This flexibility allows you to customise your audio system for different setups and scenarios. Ease of use: The ZD3 features a 1.5-inch OLED display, remote control, preamplifier bypass switch and 12V trigger interface that allows synchronised switching on and off with other home audio devices, all for a good user experience. Familiar design: With the same design language as the ZA3 amplifier, it has a compact and exquisite appearance and audiophile-grade components for high performance and excellent sound quality. Combine it with the ZA3 to create a robust home audio system. *When the ZD3 is used with an LG TV, a bug in the LG TV system may cause problems with the HDMI CEC function. Specifically, after turning off the TV with the power button or remote, both the TV and the ZD3 may automatically turn back on after a short period of time. If you are using an LG TV, we recommend disabling the HDMI CEC function. Fosi Audio is working hard to resolve this issue, apologises sincerely for the inconvenience caused and thanks you for your understanding. Specifications Chipset: XMOS XU316 + ESS 9039Q2M + QCC3031 + LME49720 Maximum Sampling Rate: USB: PCM 32bit/768kHz; DSD512 OPT/COAX: PCM 24bit/192kHz Bluetooth: PCM 24bit/48kHz Output Level: XLR: 5Vrms RCA: 2.5Vrms Input mode: USB, HDMI (ARC), Coaxial, Optical, Bluetooth Output mode: XLR, RCA SINAD: 126dB THD: ≥120dB THD+N: <0.00008% Dynamic range: ≥123dB Noise floor: ≤2μV Bluetooth version: 5.0 Bluetooth connection distance: ≥13m Bluetooth transmission audio format: aptX HD, aptX, AAC, SBC Power supply: DC 12V 1.5A USB compatible devices: Windows 7, 8, 8.1, 10, 11 (some require drivers; please read the user manual) Mac OS X, Linux (no driver required) What`s in the box DAC ZD3 *1 12V power adapter *1 Infrared remote control *1 USB-A to USB-B cable *1 3.5mm trigger cable *1 USER MANUAL *1

DAC Headphone Amp All-in-One Desktop Hi-Fi Dual-Power Balanced Amp 3-Level Gain Bass/Treble EQ + 6 Filters Comprehensive Desktop HiFi Solution With comprehensive input and output options, the ZH3 functions as a DAC, headphone amplifier, and preamp, which can be connected to IEMs, over-ear headphones, active speakers, and amplifiers. Featuring UAC 1.0 and 2.0, it is also compatible with gaming consoles, ensuring seamless connectivity across multiple desktop devices. An all-in-one desktop HiFi DAC/headphone amp/preampWith premium chipsets and self-developed fully balanced circuitry, low noise and low distortion. Perfect for HiFi headphones or active speakers, it's the ultimate desktop audio solution. Exceptional Sound QualityPremium chipset with AKM4493SEQ DAC, XMOS XU316 processor, and four OPA1612 amps supports up to PCM 768kHz/32bit & DSD512. A self-developed dual-power balanced amp circuit with multiple ultra-low-noise LDOs and capacitors keeps noise as low as 1.9μV. High Output PowerEquipped with both 6.35mm single-ended (640mW@32Ω x2) and 4.4mm balanced (2570mW@32Ω x2) outputs.The 3-level gain switch supports headphones ranging from 16Ω to 300Ω, making it perfect for almost in-ears and over-ear headphones. Versatile & FlexibleWith coaxial, optical, USB, and RCA inputs, plus 4.4mm, 6.35mm, RCA, and XLR outputs, it connects to diverse audio sources and devices. Functions as a DAC/amp/preamp for desktop HiFi. UAC mode switching ensures full compatibility with game consoles for both music and gaming. Rich CustomizationFeatures bass/treble EQ adjustments and 6 filter types, including Bypass mode and two swappable op-amps, allowing you to customize the sound to match your preference. All functions are integrated into the screen for a clean, premium look that continues the Z-Series design language.Specifications Signal-to-noise ratio (SNR): ≥ 121 dB Distortion: ≤ 0.00018% for 4.4mm headphone OUT, ≤ 0.00024% for 6.36mm headphone OUT Input connector type: Coaxial, Optical, USB, RCA Output connector: RCA, XLR Power requirement: DC 12V Dimensions (L x W x H) 15.5 x 16.2 x 5 cmWhat‘s in the box？ Fosi Audio ZH3 x 1 6.35mm Adapter x 1 12V Trigger Cable x 1 IR Remote x 1 User Manual x 1 USB-A/C to USB-C Cable x 1 DC 12V Power Adapter x1

Balanced hi-fi preamplifier Audiophile-quality components Versatile options for sound optimization Compact aluminum alloy design Various inputs and outputs HPF setting 12 V trigger input and output Remote control The Fosi Audio ZP3 is a balanced preamplifier with NE5532 AOPs. It delivers interference-free sound across a wide dynamic range and minimizes hum loops. With its performance and connections, such as TRS/XLR combo jacks and balanced XLR output, the ZP3 is perfect for audiophiles and professionals. There are also controls for bass and treble as well as channel balance, so you can adjust the sound to your liking. Three additional features are also available. These include a subwoofer output (20 Hz–200 Hz) for installing a 2.1-channel system, an XLR/RCA crossover switch (20 Hz–20 kHz / 80 Hz–20 kHz / 120 Hz–20 kHz), and a bypass mode switch. 3 inputs / 3 outputs, effortless switching Equipped with three inputs: RCA 1, RCA 2, XLR and three outputs: RCA, XLR, Sub-Out, making it easy to connect multiple audio sources for a truly flexible listening experience. Compact aluminum alloy design Metallic texture, standard design, and refined, with improved resistance to electromagnetic interference. HPF setting Offers three levels of high-pass filtering: 20 Hz-20 kHz, 80 Hz-20 kHz, 120 Hz-20 kHz. Ensures that only the high-frequency portion is sent to the main speakers, improving voice clarity and detail resolution. Versatile sound optimization options Bypass: Enjoy a super clear, noise-free listening experience by bypassing the tone control. Bass and treble controls: Achieve a personalized sound with a midrange reference for better sound optimization. Balance control: Adjust the volume between the left and right channels. Volume memory: Automatically stores the volume for each input source. When switching between sources, the volume is set to the previous level, making your hi-fi system smarter and more user-friendly. Multifunctional IR control With the remote control, which can be used for multiple Fosi Audio devices, you can conveniently adjust the volume, switch sources, and turn the device on and off from the comfort of your seat. *Note: This remote control is compatible with select Fosi Audio products. Unmarked buttons will not work with the ZP3. Audiophile-grade components Made from high-quality components such as ELNA capacitors, NJR NJU72315 volume IC, and gold-plated RCA jacks. These components reduce noise and distortion, ensuring exceptional clarity and high-fidelity performance.No compromises on materials, guaranteed low-noise and precise sound for a first-class audio experience. Suitable for various scenarios A convenient control center for all your audio sources, speakers, and subwoofers. 2.0 channel – Three audio sources + ZP3 + AMP + passive speakers 2.1 channel audio source + ZP3 + AMP + passive speakers + subwoofer 12 V trigger input/output Enables synchronized power on/off with audio setups such as the ZD3/ZA3, automating system control for seamless operation. Technical Specifications Product Type – Preamplifier AOP – NE5532 Inputs 2x single-ended stereo RCA 1x balanced TRS/XLR combo jack. Outputs 1x single-ended stereo RCA (20 Hz–20 kHz / 80 Hz–20 kHz / 120 Hz–20 kHz) 1x balanced stereo XLR (20 Hz–20 kHz / 80 Hz–20 kHz / 120 Hz–20 kHz) 1x subwoofer output (RCA) (20 Hz–200 Hz) Specifications for balanced XLR output SNR: ≥ 112 dB Dynamic range: ≥ 112 dB THD+N: ≤ 0.0007% Noise level: ≤ 6 uV Specifications for RCA output SNR: ≥ 115 dB Dynamic range: ≥ 115 dB THD+N: ≤ 0.0008 % Noise level: ≤ 4 uV General Power supply: AC 100–240 V Dimensions: 239 mm x 164 mm x 54 mm What`s in the box 1x Fosi Audio ZP3 preamplifier 1x IR remote control 1x 12 V trigger cable 1x power cable

GaN desktop headphone amplifier8 GaN FETs40 transistors7400 mW + 7400 mW at 32 ΩLinear power supplyDC protectionState-of-the-art componentsSingle-ended and balanced inputs/outputs4-channel TI volume controlCNC aluminum housingNamed after KunlunThe prologue to iBasso's high-end desktop devicesKunlun is the mythological home of heavenly beings and symbolizes the highest reverence.The iBasso Kunlun was named with this in mind – and stands for iBasso's tireless pursuit of high-end sound quality.As a high-end GaN desktop headphone amplifier, Kunlun combines state-of-the-art amplifier technology and embodies the pioneering spirit of technological exploration and advancement.Groundbreaking GaN desktop amplifierThe pinnacle of sound qualityAs the first manufacturer to use GaN in a highly affordable desktop headphone amplifier, Kunlun represents iBasso's exploration of cutting-edge technology. GaN FETs feature electron mobility (up to 2000 cm²/Vs) that surpasses conventional MOSFETs and silicon transistors, offering higher electron speeds and lower conduction losses at high frequencies. GaN FETs have significantly lower parasitic Miller charge (QGD) compared to equivalent Rds(on) power MOSFETs, enabling faster switching speeds. When used in audio amplification, this results in improved transient response, dynamics, and control.High current, low internal resistancePrecision in every detailThe extremely low Rds(on) value of GaN enables higher current drive capability. As a powerful desktop amplifier, Kunlun has an output impedance of only 0.12 Ω and is capable of precisely driving low-impedance in-ear monitors and delivering a dynamic, multi-layered sound. Its control power is like a towering robot performing a delicate ballet.Equipped with 40 high-performance transistorsA powerful product range for overwhelming performanceKunlun uses high-quality components: 8 power transistors in the output stage and a 16×2 configuration of the driver stage, a total of 32 transistors, to build a super-large discrete amplifier system. Compared to conventional operational amplifier architectures, Kunlun's current output power is many times higher and offers greater dynamic reserve/headroom with detailed clarity, while delivering powerful and refined high-quality sound.7400 mW + 7400 mW at 32 ΩMastering all challengesIn balanced mode with a 32 Ω load, each channel delivers up to 7400 mW, enough to drive any high-impedance, low-sensitivity full-size headphones. Kunlun features a robust dynamic range with a rich, multi-layered soundstage.Linear power supplyKunlun dispenses with digital rectification and returns to analog aestheticsKunlun dispenses with switching power supplies and instead relies on linear transformers with high-quality voltage regulators. This ensures a more consistent power supply and lower noise levels. Our linear power supply keeps the entire analog signal chain stable and quiet while presenting microtextures and details with near-zero distortion, enhancing the analog flow of the music.Comprehensive DC protectionA firewall for your headphonesThe integrated DC protection circuit detects abnormal DC components and immediately cuts off the output power, protecting your headphones from damage. Complete protection for audiophiles.Selection of state-of-the-art componentsHigh investment for superior soundEvery component in Kunlun is carefully selected, true to the philosophy of “striving for perfection.” The device uses eight powerful GaN FETs and a large number of audiophile-grade electrolytic capacitors and film capacitors, which ensure a stable power supply and extremely low distortion, producing a clear, refined, warm, and captivating sound.Analog adjustment, digital controlEase of use as a matter of courseKunlun uses high-quality volume control chips from TI (Texas Instruments); at any volume, the left and right channels maintain high consistency and can be adjusted linearly and finely. At the same time, Kunlun uses an analog potentiometer for control, allowing users to experience the tactile feel of turning the analog potentiometer. A three-stage potentiometer enables hardware gain control, adapts to different headphone sensitivities, and effectively suppresses noise and distortion, keeping the sound pure and natural.Plug-and-play, simple and intuitive designEvery detail is carefully crafted to provide an intuitive experienceKunlun uses a purely analog audio design that requires no drivers or complex setup—just plug and play. The volume control and gain switch provide an excellent tactile feel. Every detail has been refined to provide users with a secure, immersive experience.CNC aluminum housingConveys a sense of luxuryThe housing is made from an aluminum alloy with precise CNC machining and features an anodized surface treatment for a hard, scratch-resistant finish. Its sleek, classic appearance conveys a refined metallic texture. The top panel allows for good heat dissipation and, combined with an optimized interior, ensures stable and efficient operation under heavy loads, preventing overheating that could affect sound quality.Input/output interfacesInputs: XLR balanced inputRCA unbalanced input4.4 mm balanced inputOutputs: XLR output (balanced)6.35 mm output (unbalanced)4.4 mm output (balanced)

High-end DAC/AMPCNC aluminum housing2x ESS ES9039 Pro chips8x 1611 OPAsPCM up to 32-bit/768 kHz and DSD512TPA 6120 with up to 1620 mW at 32 ohmsDual TALEMA transformersWith the ONIX Zenith XDA20, Shanling presents a high-end DAC and headphone amplifier that combines luxurious design with state-of-the-art components. It uses two ES9039Pro DAC chips in combination with a specially developed I/V architecture for digital-to-analog conversion of rare quality, capable of processing data up to 32-bit 768 kHz PCM and DSD512. The amplifier stage is based on a TPA6120 chip, which ensures smooth sound reproduction and an output of up to 1620 mW at 32 Ω. The entire device is housed in an impressive CNC-milled aluminum case, which features the black and gold aesthetic characteristic of the ONIX series.Shanling ONIX Zenith XDA20State-of-the-art technologyThe heart of the XDA20 is based on a dual ESS ES9039Pro chip, which can process PCM streams up to 32-bit/768 kHz and DSD512 files with exemplary precision. This dual DAC chip is supported by a proprietary “Brighton” I/V architecture developed in-house by Shanling, which uses 8 OPA1611s to ensure rich, detailed sound reproduction with an expansive soundstage and impressive dynamics.Amplification is handled by a TPA6120 chip, known for its ability to deliver smooth, controlled sound even with demanding headphones. The XDA20 can deliver up to 1620 mW at 32 Ω and has a comfortable power reserve.The device is powered by a low-noise, high-quality power supply with two Talema transformers (25 W and 15 W), supported by four 3300 uF/63 V capacitors, ensuring stable, noise-free regulation.The Zenith XDA20 adapts to any type of setup and offers three different output modes: preamplifier output, line output, and headphone amplifier, which can be easily selected depending on the application. It has a particularly extensive selection of digital connections, including a USB-B input, an I2S input via HDMI, a coaxial RCA connection, an optical Toslink connection, and BNC and AES/EBU connections. On the output side, it offers single-ended RCA and balanced XLR connectors on the rear panel, while the front panel features a 6.35 mm jack headphone output, ensuring great versatility for both listening through headphones and integration into a larger hi-fi system.Dual TALEMA transformer power supplyImported audio-specific iron core, high-performance filter capacitorThe XDA20 is powered by two 15 W + 25 W TALEMA transformers, which ensure a strong and stable power supply. The imported iron core, specially designed for audio applications, is pure and clear; four 3300 μF/63V VISHAY capacitors serve as power filters for a stronger power supply.Shanling ONIX Zenith XDA20As stylish as it is ergonomicThe Zenith XDA20 features a sturdy and elegant CNC aluminum case that reflects the distinctive black and gold design of the ONIX series. The slim front panel is equipped with a 3.4-inch touch color screen that can display various content and support multiple function settings. Adopting the design language of the Zenith XST20 family, simple design, elegant style. Complemented by a navigation wheel for smooth and intuitive operation. A remote control for wireless control is also provided.Supports multiple input/output methodsDigital inputs: COAXIAL/OPTIC/BNC coaxial/AES EBU/I²S/USB DACLine output: RCA/XLRHeadphone output: 6.35 mm*Specifications for digital inputs:SPDIF input: PCM: 192 kHz/24-bit, DSD: DOP64I²S input: PCM: 768 kHz/32-bit, DSD: DSD512USB DAC input: PCM: 768 kHz/32-bit, DSD: DSD512

Kompakter Desktop-DAC und Kopfhörerverstärker Cirrus Logic CS43198 DAC Dual SGM8262 Kopfhörerverstärker Bis zu 1015 mW @ 32 Ohm Ausgangsleistung Höhen (±10dB) & Bässe (±6dB) Klangregelung Hi-Res 32 bit / 768 kHz & DSD512 USB-Digitaleingang 6,35 mm und 4,4 mm Kopfhörerausgänge RCA-Ausgang mit umschaltbarem Line-out/Pre-out-Modus SPDIF-Koaxialausgang Stromversorgung über USB-C oder Gleichstrom Neues geschwungenes Design, Aluminiumkonstruktion Minimalistisches Design Der Shanling EH1 verkörpert mit seinem schlanken, geschwungenen Aluminiumgehäuse minimalistisches Audiodesign. Ohne Bildschirme oder komplizierte Schnittstellen verfügt er nur über wenige Tasten und Regler, was eine intuitive Benutzererfahrung gewährleistet. Hochwertige Audioleistung Ausgestattet mit einem Cirrus Logic CS43198 DAC und zwei SGM8262 Kopfhörerverstärkern bietet der EH1 eine außergewöhnliche Audioqualität und -geschwindigkeit. Er liefert eine Ausgangsleistung von bis zu 1015 mW bei 32 Ohm und sorgt so dafür, dass jede Note präzise wiedergegeben wird. Das Gerät unterstützt hochauflösende Audioformate, darunter 32 Bit/768 kHz und DSD512, und ist damit der perfekte Begleiter für Audiophile. Individueller Klang Der EH1 verfügt über separate Regler für Höhen und Bässe, mit denen Sie Ihr Hörerlebnis ganz einfach an Ihre Vorlieben anpassen können. Ganz gleich, ob Sie etwas mehr Druck im Bassbereich oder funkelnde Höhen bevorzugen, mit diesem kompakten Verstärker können Sie Ihren Klang ohne komplexe Einstellungen individuell anpassen. Vielseitige Anschlussmöglichkeiten Mit USB-C- und 5V-Gleichstrom-Stromversorgungsoptionen ist der EH1 vielseitig genug, um sich nahtlos in jedes Setup einzufügen. Er verfügt über 6,35-mm- und 4,4-mm-Kopfhörerausgänge für die Kompatibilität mit verschiedenen Kopfhörern sowie über einen Cinch-Ausgang, der zwischen Line-Out- und Pre-Out-Modus umgeschaltet werden kann. Darüber hinaus erweitert der koaxiale SPDIF-Digitalausgang die Anschlussmöglichkeiten und macht ihn zu einem leistungsstarken Werkzeug für jeden Audio-Enthusiasten. 

DAC R2R 32bit 768kHz DSD512 Headphone Amplifier Transistors Bluetooth 5. 2 In-house developed 24-bit R2R DAC Extra powerful amplifier up to 4.3W @ 32 Ohm External DC12V power supply XMOS USB input Qualcomm Bluetooth input Coaxial and optical inputs Bass & treble tone control High resolution 32 bit 768 kHz and DSD 512 With the EH2, Shanling presents a desktop DAC and headphone amplifier that is intended as a successor to the Shanling HE1. This further development includes digital/analogue conversion via an R2R ladder resistor network, which was developed directly by Shanling itself in order to approximate the sound reproduction of the PCM1704 chip. This DAC can process signals up to PCM 32bit 768kHz and DSD512. The amplifier stage is based on transistors and offers an output power of up to 4.32W at 32Ω. R2R DAC Shanling decided to develop its own DAC for the EH2. Inspired by the legendary PCM1704 DAC chip, the R2R 24bit DAC enables digital-to-analogue conversion of signals up to PCM 32bit 768kHz and DSD512, while providing sound reproduction with a characteristic analogue sound. A NOS mode is also available, allowing you to enjoy your tracks as close to the original as possible. Transistor amplification The amplification stage of the HE02 is based on BD139 and BD140 transistors for an output power of 4.32 W in 32Ω for the balanced headphone output and 1.28 W in 32Ω for the unbalanced headphone output. In addition, the line output is equipped with an OPA 1612, which provides an output level of 4.5 V balanced and 2.2 V unbalanced. Extended connection options The EH2 also offers more extensive connection options than its predecessor. It has an optical Toslink input, a coaxial input and a USB-C input. The latter is equipped with an XMOS XU316 interface that supports signals up to PCM 32bit 768kHz and DSD512. In addition, the EH2 has Bluetooth 5.2 connectivity thanks to the Qualcomm QCC5125 chip, which enables wireless connectivity and ensures excellent quality thanks to support for the high-definition codecs LDAC, aptX, aptX HD and aptX Adaptive.

Ultra-flagship headphone amplifier Six-channel T'ang-ku-la™ circuitry for unmatched clarity Record-breaking dynamic range of 151 dB and SNR Enormous output power of 22,000 mW x 2 at 16 Ω True Full-Link differential symmetry architecture Versatile, high-quality connectivity with 6 output ports Dedicated high-end preamp mode with flagship performance Fully symmetrical relay volume control for ultimate purity Responsive touch interface and customizable display Optimized T'ang -ku-la amplifier architecture The A900 features TOPPING's exclusive T'ang-ku-la amplifier architecture, which utilizes a groundbreaking three-stage feedback circuit. This patented technology reduces circuit noise and high-frequency distortion and increases the dynamic range to an exceptional 151 dB. Full-band THD is reduced to a record-breaking 0.00003%, ensuring an exceptional listening experience. This innovation also minimizes circuit heat, improving the amplifier's reliability and lifespan while ensuring stable performance. Enormous output power With an unprecedented output power of 22,000 mW x 2 at 16 Ω, the A900 is designed to effortlessly drive even the most demanding headphones. Whether you use high-impedance or low-impedance headphones, this amplifier delivers enormous power bandwidth and ensures precise sound reproduction at all volumes. Fully symmetrical differential architecture The A900 features a fully symmetrical six-channel differential architecture that ensures pure signal integrity from source to output. This provides unmatched clarity and separation, allowing you to hear every nuance of your music. With Neutrik connectors and multiple output options, it supports a wide range of professional and audiophile headphones. Precise relay volume control The A900's fully balanced relay volume control ensures a pure, distortion-free listening experience. With -153 dB channel crosstalk and precise volume control in 0.5 dB increments, the A900 offers unparalleled sound purity and control, making it ideal for audiophiles seeking a premium listening experience. Preamplifier function for peak performance The A900 also functions as a high-quality preamplifier with a THD+N value of <0.000055%. Its flagship performance ensures seamless coupling with power amplifiers and delivers exceptional fidelity, making it the perfect companion for your high-end audio system. Refined design with purpose The industrial design of the A900 reflects its music-oriented philosophy-clean, angular lines that convey both logic and emotion. Behind its striking exterior lies a powerful amplifier for audiophiles who demand only the best. Responsive and intuitive control With a 2-inch color display and touch-sensitive buttons, the A900 offers simple and intuitive control. Switch between different display modes, such as playback information, FFT spectrum, or VU meter, and customize the user interface with 9 background colors to suit your aesthetic preferences. High-quality remote control The A900 features a high-quality remote control made of high-strength aluminum alloy, providing a refined user experience and precise control of your listening environment. Isolated power supply for improved stability The digital and analog circuits in the A900 are powered by isolated power supplies, which ensure a more stable voltage and reduce interference. This design decision ensures reference-level performance and cleaner sound reproduction. SpecificationsTHD+N @1kHz A-wt: <0.000055% THD @20-20kHz 90kBW: <0.00003% SNR @MAX OUT 1kHz A-wt: 151 dB Dynamic range @1kHz A-wt: 151dB Frequency response: 20Hz-40kHz(+0.05dB)20Hz-200kHz(+0.1dB) Output level: 60Vpp@G=L 60Vpp@G=M 60Vpp@G=H AP-measured noise level @A-wt: <0.7 uVms @G=L <1.2 uVms @G=M <2.5 uVmms @G=H Actual noise level @A-wt: <0.3 uVrms @G=L<1.0 uVrms @G=M<2.3 uVrms @G=H Channel crosstalk @1 kHz: -153 dB Input sensitivity: 22.0 Vrms @G-L 7.0 Vrms @G=M 2.1 Vrms @G=H Gain: -0.1 dB @G=L +10.3 dB @G=M +19.8 dB @G=H Output impedance: 100 Ω What`s in the boxTOPPING A900 headphone amplifier x1 Remote control x1 6.35 mm to 3.5 mm adapter x1 Power cord x1 User manual x1 Product information card x1