B001KW3WUW TOA M-61S Balanced Microphone Input with Compressor, For Balanced Low Impedance Microphones, Removable Terminal Block Connector, Phantom Power Defeat PCB Controls

High and Low Cut Fileters for tone control, 4.2k Hz and 330 Hz, 6 dB/octave
Phantom Power, +22V DC for condenser-type microphones. Activate by default, cut Jumper J1 to disable
Compressor Function Helps Prevent Overload And Distortion, activates when the module’s input signal exceeds a preset, adjustable threshold
Compression Ratio: 2:1 (fixed), reduces the module’s output signal level to 1 dB for every 2 dB increase in input siganl level
Threshold Control – turn CW to lower threshold (to activate compressor function with lower input signal) and CCW to increase threshold (to activate compressor function with higher input signal)