The 7Hz Sonus is a wired hybrid IEM with one dynamic driver and one balanced armature per side, rated 30Ω and 109dB/V, in medical-grade front chambers with aviation-grade aluminum backs. It suits listeners looking for a first hybrid IEM in black, gray or red, with a silver-plated OCC cable ending in 3.5mm or 4.4mm.
Who the 7Hz Sonus is for
First hybrid IEM: One balanced armature and one dynamic driver per side cover a quoted 10Hz–20kHz with THD under 1% at 1kHz.
Balanced or single-ended rigs: Choose the 3.5mm cable for standard headphone outputs or the 4.4mm cable for balanced outputs on DAPs and DACs.
Long listening sessions: 7Hz shaped the shell from models of the human ear canal, with a medical-grade front chamber and a lightweight aviation-grade aluminum back.
Cable detail: The detachable silver-plated OCC cable has 49 wires per core in a 4-core braid on 0.78mm 2-pin connectors.
Skip it if: you need a mic for calls or game chat; the Sonus is offered here with 3.5mm or 4.4mm audio-only cables.
7Hz Sonus key specs
Drivers: Hybrid: 1 dynamic + 1 balanced armature per side
Impedance: 30Ω at 1kHz
Sensitivity: 109dB/V at 1kHz
Frequency range: 10Hz–20kHz
THD: Under 1% at 1kHz
Shells: Medical-grade front chamber, aviation-grade aluminum back chamber
Connector: 0.78mm 2-pin, detachable
Cable: Silver-plated OCC, 49 wires per core, 4-core braid
Plug options: 3.5mm or 4.4mm balanced
Colors: Black, Gray, Red
Genuine 7Hz stock. Free shipping on every order, 45-day returns.
7Hz Sonus vs similar options
vs SIMGOT EW300: Adds a planar driver and a PZT driver alongside its dynamic driver, plus interchangeable tuning nozzles; pick the 7Hz Sonus if you want a balanced armature paired with the dynamic driver.
vs KZ Zenith: Uses a single dynamic driver in a metal housing with onboard tuning options, in black; pick the 7Hz Sonus for a dynamic + balanced armature hybrid in black, gray or red.
Detachable silver-plated OCC cable, 0.78mm 2-pin (3.5mm or 4.4mm plug, by version)
Good to know
Buying from TonePier
Is this unit genuine?
Yes. Every unit we sell is genuine and brand-new, shipped in its original packaging, and backed by our 1-year TonePier warranty and 45-day returns.
Where does my order ship from, and how long does it take?
Every order ships from our warehouse in China, with full tracking, and most orders ship within 3 business days. Shipping is free on every order; most US orders arrive within 7–15 business days and most orders to other countries within 7–20 business days — see our shipping policy for details.
What if it isn't for me?
You get 45 days to decide. Keep the packaging, keep it in like-new condition, and send it back for a refund. Ear tips unsealed for hygiene reasons are fine — we expect you to actually listen.
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