TOA M-61S Microphone Input with Compressor

The TOA M-61S is a microphone input module engineered for professional audio systems requiring balanced, low-impedance microphone inputs. Compatible with TOA's 900 Series components and other modular systems, this module features a removable terminal block connector, phantom power for condenser microphones, and advanced tone and compressor controls to maintain clean, distortion-free sound.

Its high-pass and low-pass filters offer precise tone shaping, while the integrated compressor function automatically reduces gain when input levels exceed a set threshold—ensuring consistent, clear output even in dynamic speech environments. With adjustable compression threshold and fixed 2:1 ratio, the M-61S is ideal for paging, conferencing, and broadcast systems.

TOA M-61S Key Features

• Balanced, low-impedance microphone input

• Phantom power: +22V DC for condenser microphones (enabled by default; disable via jumper J1)

• High- and low-cut filters for tone control

  • High cut: 4.2 kHz, 6 dB/octave

  • Low cut: 330 Hz, 6 dB/octave

• Built-in compressor function

  • Compression ratio: 2:1 (fixed)

  • Threshold control:

    • Turn CW to lower threshold (compresses lower-level signals)

    • Turn CCW to raise threshold (compresses only high-level signals)

• Compressor activation: Automatically engages when input exceeds adjustable threshold

• Connector: Removable terminal block

• Designed for TOA 900 Series amplifiers and other modular audio systems

TOA M-61S SPECIFICATION