TOA Electronics U-13R - Unbalanced Line Input Module with High/Low Cut Filters and Mute-Receive for 900 Series (Dual RCA) - Manual (Page 10)

• 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.
• Signal At Input Terminals Activates Both Mute Bus #
1 and Mute Bus # 2 by Default
(cut jumper(s) to
disconnect individual mute bus).
• Connector: removable terminal block (M-41S).
M-41
M-51
M-51 Series Microphone Input with Voice Gate
M-41S Microphone Input with Mute-Send
• For Balanced, Low Impedance Microphones.
• Low Cut Filter for tone control, 330 Hz, 6 dB/octave.
• Phantom Power , +22 VDC for condenser-type
microphones. Active by default, cut Jumper J1 to disable.
• Voice Gate Function , module OFF until input signal
exceeds threshold.
• Sensitivity Control - turn clockwise to increase sensitivity
(to open gate with lower input signal) and counter-
clockwise to reduce sensitivity (to open gate with higher
input signal).
• Connectors: female XLR (M-51F), removable terminal
block (M-51S).
CONNECTOR DIAGRAMS
SPECIFICATIONS
BLOCK DIAGRAM
MICROPHONE INPUT MODULES PAGE 11
CONNECTOR DIAGRAM
SPECIFICATIONS
BLOCK DIAGRAM
M-41S
M-41S
M-51F
M-51F
M-51S (old style)
M-51S (old style) M-51S (new style)
Faceplate Controls Gain, high & low cut filters
PCB Controls Mute send sensitivity, phantom power
defeat, mute bus selection
Input Impedance 600 ohms, balanced transformer-isolated
Sensitivity -69 ~ -45 dBu
Gain 27 ~ 51 dB
Noise (EIN) -124 dBu, 200 ohms terminated
Faceplate Controls Gain, low cut filter, voice gate sensitivity
PCB Controls Phantom power defeat
Input Impedance 600 ohms, balanced transformer-isolated
Sensitivity -70 ~ -50 dBu
Gain 32 ~ 52 dB
Gate Sensitivity -58 dBu ~ always open
Noise (EIN) -126 dBu, 200 ohms terminated
M-51S (new style)