The TOA M-21S is a microphone input module designed for use with TOA's 900 Series components and other compatible equipment. It features a transformer-balanced microphone input with screw terminal connectors for secure and easy integration. The M-21S supports phantom power for condenser microphones, includes gain and tone controls for precise sound adjustment, and features a remote volume control function—ideal for systems requiring flexible and accessible audio control. Engineered for professional audio environments, the M-21S offers reliability and high-quality audio performance.
TOA M-21S Features
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Transformer-balanced microphone input for low-noise, professional-grade audio
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Screw terminal connections for secure installation
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Phantom power supply (for condenser microphones)
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Gain and tone controls for optimized sound quality
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Remote volume control capability
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Compatible with TOA 900 Series amplifiers and other TOA components
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Ideal for conference rooms, classrooms, public address systems, and commercial installations
TOA M-21S SPECIFICATION
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Power Source
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24 V DC (supplied from the main frame)
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Current Consumption
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30 mA
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Input Sensitivity
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-60 dB* (rated output: -20 dB*), adjustable: -72 to -52 dB*
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Input Impedance
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600 Ω, balanced transformer-isolated
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Frequency Response
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25 Hz - 20 kHz ±1.5 dB
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Distortion
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0.05 % or less (1 kHz, output: 0 dB*)
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Noise Level
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-86 dB* (20 Hz - 20 kHz BPF), input equivalent noise: -126 dB*
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Gain
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32 - 52 dB
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Phantom Power
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+22 V DC (active or disable selectable)
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Tone Control
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100 Hz: 0 to -10 dB, 10 kHz: 0 to -10 dB
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Remote Control Range
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0 to -55 dB
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Connector
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5 Screw terminals
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Dimensions
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35 (W) × 78 (H) × 88 (D) mm (1.38 × 3.07" × 3.46")"
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Weight
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Max. 90 g (0.2 lb)
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