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The M-51S from TOA Electronics is a microphone input module for 900 series amplifiers. It accepts signals from balanced, low impedance microphones. The voice gate function keeps the module muted until the input signal exceeds the threshold. Other functions of the M-51S include gain control, a low cut filter, and phantom power. Inputs are connected via the 3-pin removable terminal block connector.
In the Box
Toa Electronics M-51S - Microphone Input Module with Voice Gate for 900 Series Amplifiers (Removable Terminal Block)