TOA Electronics U-13R - Unbalanced Line Input Module with High/Low Cut Filters and Mute-Receive for 900 Series (Dual RCA) - Manual (Page 11)

M-61
M-03
M-03P High Impedance Microphone Input
M-61 Series Microphone Input with Compressor
• For Unbalanced, High Impedance Microphones.
• High and Low Cut Filters for tone control, 4.2 kHz and
330 Hz, 6 dB/octave.
• Connector: 1/4" phone jack (M-01P).
CONNECTOR DIAGRAM
SPECIFICATIONS
BLOCK DIAGRAM
• For Balanced, Low Impedance Microphones.
• High and Low Cut Filters for tone control, 4.2 kHz and
330 Hz, 6 dB/octave.
• Phantom Power , +22 VDC for condenser-type
microphones. Active 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
signal 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).
• Connectors: female XLR (M-61F) or removable terminal
block (M-61S).
CONNECTOR DIAGRAMS
SPECIFICATIONS
BLOCK DIAGRAM
MICROPHONE INPUT MODULES PAGE 12
M-61F
M-61F
M-61S (old style)
M-61S (old style) M-61S (new style)
M-03P
M-03P
Faceplate Controls High and low cut filters, compressor threshold
PCB Controls Phantom power defeat
Input Impedance 600 ohms, balanced transformer-isolated
Sensitivity -70 ~ -50 dBu
Gain 32 ~ 52 dB
Compressor Range 20 dB
Compressor Threshold -64 ~ -44 dBu
Noise (EIN) -126 dBu, 200 ohms terminated
Faceplate Controls Gain, high & low cut filters
Input Impedance 50 kohms, unbalanced
Sensitivity -60 ~ -40 dBu
Gain 22 ~ 42 dB
Noise (S/N) 70 dB
M-61S (new style)