M-21S
Mic Preamplifier Module
M-21S
The M-21S is a microphone input module to be used in conjunction with the 900 series components and other TOA's equipment. It has a transformer balanced microphone input with screw terminals, remote volume control function, phantom power supply function, and gain and tone controls.
- For balanced, low impedance microphone
- High and low cut filters for tone control
- Phantom power for condenser-type microphones
- Allows remote control of input signal using an external 10k ohm linear-taper potentiometer
- Connector: removable terminal block
* 0 dB=1 V
Power Supply
24 V DC (supplied from the main frame)
Current Consumption
30 mA
Input Sensitivity
-60 dB* (rated output: -20 dB*), adjustable: -72 to -52 dB*
Input Impedance
600 Ω, balanced transformer-isolated
Frequency Response
25 Hz - 20 kHz ±1.5 dB
Distortion
0.05 % or less (1 kHz, output: 0 dB*)
Noise Level
-86 dB* (20 Hz - 20 kHz BPF), input equivalent noise: -126 dB*
Gain
32 - 52 dB
Tone Control
100 Hz: 0 to -10 dB, 10 kHz: 0 to -10 dB
Phantom Power
+22 V DC (active or disable selectable)
Remote Control Range
0 to -55 dB
Connector
5 screw terminals
Dimensions
35 (W) x 78 (H) x 88 (D) mm (1.38" x 3.07" x 3.46")
Weight
Max. 90 g (0.2 lb)
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