The Tech Works HM-1-SUB Hidden Microphone is a highly sensitive voice microphone designed for integration into Operator Consoles and custom systems where a quality, balanced, omnidirectional, microphone is required for voice pick up. An electronic balancing circuit shapes the omni- directional microphone for high voice band sensitivity while adapting it for low impedance connection over long wire lengths with minimal noise. Wiring is a standard twisted, shielded audio pair cable connected by screw terminals.
Mounting is by 2 screw holes in the circuit board. No mounting hardware is included.
This product is specifically designed and manufactured for use with the ICA- 202 Intercom Amplifier.
Electret Condenser Microphone Pick up
Pattern: Omni directional
Sensitivity: -60 dB
Frequency Response: 50 to 16K Hz
Termination Impedance: 200 Ohms
Phantom Power: 10 to 60 VDC (10 mA @ 10 V)
Dimensions: 1” W, 2” H, 1” D
Wiring is One Twisted Shielded Pair S = Shield
– = Microphone – (Black) + = Microphone + (White Or Red)
Mounting: 2 – .125” holes for 4-40 studs on either side of the center of the
microphone or 0.8” apart
Datasheet: HM-1-SUB Datasheet (PDF)