01 / Identity

Six transducers per ear. One acoustic system.

Voix 4 keeps the silicon DNA of the Metal MEMS-422 and rebuilds the system around a Voix acoustic resonator — a coupled chamber that shapes how the Muir MEMS driver is heard.

Per ear: 6 transducers
Voix region: 1.5–2.5 kHz
Resonance mode: ≈ 1.8 kHz
Successor to: Metal MEMS-422
Fit: 50+ real ear impressions
Energizer: AP GO included

02 / Sound + Voix

Where speech lives, the system works hardest.

Voix does not recreate open-ear resonance. It changes how the driver is acoustically configured in the 1.5–2.5 kHz region, where voices carry most of their information. Muir’s own 12.2 kHz mechanical resonance is not shifted.

Pitch / fundamental energyVoix region 1.5–2.5 kHzAir / harmonics

MEMS-Voix 4 frequency response, ARTA, 1/24 octave, 20 Hz to 20 kHz. — ARTA, demo unit, October 2026. Unaltered graph. Vertical scale 65–135 dB.

MEMS-Voix 4 burst-decay waterfall over 30 periods, 20 Hz to 20 kHz. — Time-domain behavior around the Voix region. Does not by itself prove subjective preference.

Render of the Voix acoustic assembly: the xMEMS Muir driver coupled to a tuned chamber.

03 / Configuration

Four kinds of driver, each with a job.

xMEMS Muir — silicon, solid-state1×
Usound Conamara — MEMS1×
Micro-planar2×
Dynamic2×

Driver-role descriptions: [COPY TO CONFIRM]

04 / Form

Shaped from real ears.

Shell geometry comes from more than 50 pairs of real ear impressions, so the nozzle angle and body sit where ears actually are.

[ASSET REQUIRED]
Ear-impression
overlay / fit photo

05 / Use · AP GO energizer

Included: AP GO.

A pocket-sized energizer with regulated DC bias of 9 V or more, driving Muir within its signal range. Plug in, listen.

Regulated DC bias≥ 9 V
Signal handlingup to 24 Vpp
FormPocket-sized

[ASSET REQUIRED]
AP GO product photo
(AP GO 2 is not included)

06 / Reviews

What reviewers heard.

Review · MEMS-VOIX 4
“[REVIEW QUOTE REQUIRED]”
[Reviewer] · [Publication] · [Date] · [Link]

Specifications

MEMS-Voix 4 in detail.

Drivers per ear: 1 Muir · 1 Conamara · 2 planar · 2 dynamic
Impedance: [DATA REQUIRED]
Voix region: 1.5–2.5 kHz (mode ≈ 1.8 kHz)
Sensitivity: [DATA REQUIRED]
Connector: [DATA REQUIRED]
Cable: [DATA REQUIRED]
Shell: [DATA REQUIRED]
Weight: [DATA REQUIRED]
Included energizer: AP GO
Warranty: [DATA REQUIRED]

Also in the Voix family

MEMS-Voix 3 — MEMS-3S 2025, evolved.

View Voix 3 →