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Audio Technica AT8684 UniMute Mic Attenuator With User Definable Switch Function

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The AT8684 is a versatile attenuator that permits easy in-line switch installation and flexible application. Type of external single-pole switch the user supplies determines muting function; closed contact causes muting. Use for on/off, push-to-talk, push-to-mute, etc. (Additional, isolated poles on the switch may be used to control logic-level DC circuits.)


- Professional XLR-type input/output connectors

- Can be installed anywhere in-line, either at the mixer input or near the microphone

- 24-48V DC phantom power and balanced cables required for operation

- Permits phantom voltage to pass on to the microphone

- Rugged steel housing

Input Output Connectors


Phantom Power

24-48V DC, 2-4 mA typical

Frequency Response

20-20,000 Hz


Unity (0 dB), +0/-1.5 dB

Noise A-Weighted

-115 dBV typical


250 g


5.12″ (130.0 mm) W x 2.36″ (60.0 mm) D x 1.73″ (44.0 mm) H typical

Input Impedance

5,300 ohms

Output Impedance

500 ohms

Maximum Input Level

+17 dBV (1% T.H.D. at 1 kHz)

Maximum Attenuation

57 dB at 1 kHz


UniMute® specifications measured at 48V phantom power, 150 ohms input load and 100,000 ohms output load.


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