7Hz Sonus 2

Dynamic + Planar Hybrid In-Ear Headphones 

• Custom dynamic and high-frequency planar hybrid driver configuration
• Weighty bass with clear, forward vocals
• Expansive soundstage with layered, separated mixes
• Triple sound-control system for smooth driver transitions
• Aerospace aluminum rear cavity with skin-friendly front cavity
• High-purity silver-plated OFC 4-strand braided cable with detachable 0.78 mm 2-pin connectors
• 24K gold-plated acoustic cover and rear cavity 

Custom Dynamic and Planar Driver Configuration

At its core, Sonus II pairs a custom dynamic driver with a custom high-frequency planar driver. The dynamic driver uses a custom diaphragm, an N52 magnet and a large black voice coil to carry the low end, while the planar driver handles treble layering and extension. A triple sound-control system, consisting of acoustic steel mesh, tuning cloth and acoustic foam, keeps airflow stable and driver transitions smooth, so low-end weight supports modern productions without burying vocals.

Weighty Bass That Stays Out of the Way

The dynamic driver supplies the low-end weight, while the triple sound-control system keeps the transition into the mids smooth. Hip-hop and EDM keep their weight, vocals stay clear, and jazz cymbal trails stay smooth. The tuning leans toward full-bodied bass with texture, a transparent midrange and detailed highs that stay smooth, so low-end weight supports modern productions without burying vocals, while the midrange keeps vocals forward.

Expansive Staging with Clear Layers

The soundstage opens to place instruments and effects in their own space, while responsive transients keep fast percussion and rhythmic shifts from smearing together. Film soundtracks keep their impact without collapsing into a wall of sound, and game spatial cues stay easy to follow. Treble holds cymbal detail without harshness, making Sonus II equally suited to focused listening and immersive entertainment.

Daily-Driver Build with an Upgrade Path

The shell pairs a skin-friendly front cavity with a sandblasted, anodized aerospace-aluminum rear cavity, plus a 24K gold-plated acoustic cover and gold-plated rear cavity. The high-purity silver-plated OFC cable, braided from 196 strands across four strands, uses a detachable 0.78 mm 2-pin socket, offering an easy upgrade path for future cable rolling. This durable construction ensures long-lasting reliability for daily use across commutes, home listening and desk setups.

Versatile Tuning for Music and Production

Sonus II is aimed at music lovers who want a rich yet easy-listening sound for daily use. Its clear midrange and layered treble also help musicians and producers judge vocal placement and instrument separation in their own listening. It suits hip-hop, electronic, pop, rock, acoustic and film-score material, delivering full-bodied bass, clear vocals and smooth, easy highs that keep you engaged across long listening sessions without fatigue.

Technical Details

Product name: 7Hz Sonus II Dynamic + Planar Hybrid HiFi Wired IEMs

Driver configuration: Custom dynamic driver + custom high-frequency planar driver (1 DD + 1 Planar)

Impedance: 29 Ω @ 1 kHz

Sensitivity: 108 dB/V @ 1 kHz

Frequency response: 10 Hz to 20 kHz

THD: < 1% @ 1 kHz

Sound control: Acoustic steel mesh, acoustic tuning cloth, acoustic foam (triple sound-control system)

Front cavity: Skin-friendly, front-chamber acoustic blending

Rear cavity: Aerospace-grade aluminum (sandblasted and anodized)

Acoustic details: 24K gold-plated acoustic cover and gold-plated rear cavity

Connector: Detachable 0.78 mm 2-pin

Cable: High-purity silver-plated OFC, 4-strand braid, 196 strands

Box Contents

1x 7Hz Sonus II IEMs (pair)

8x Silicone ear tips (pairs)

1x Detachable IEM cable (0.78 mm 2-pin)

1x Carrying case

1x User manual