M-61F
Mic Preamplifier Module
M-61F
The M-61F 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 female XLR type connector, phantom power supply function, compressor function, and threshold and tone controls.
- For Balanced, Low Impedance Microphones.
- 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).
- Connector: female XLR
* 0 dB=1 V
Power Supply
24 V DC (supplied from the main frame)
Current Consumption
33 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
0.1 % or less (1 kHz, output: -60 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 (for condenser-type)
Signal Muting Level
20 dB (Threshold adjustable input level: -66 to -46 dB*)
Connector
Female XLR connector (XLR-3-31 equivalent)
Dimensions
35 (W) x 78 (H) x 88 (D) mm (1.38" x 3.07" x 3.46")
Weight
Max. 110 g (0.24 lb)
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