CM 2
Mik-El / Chilton Page 5 of 26
Input module M4 (or M44)
The test lead suitable for M1 inputs can be used only for M4 balanced inputs. Unbalanced
Line and Phono inputs require different pin connections as follows:
Male XLR connector, link pins 2 and 3 to: Female XLR into Auxiliary 1 output and Male
XLR into either stereo input and depress relevant input selector switch L1 or L2. (Osc. 1kHz
A1 button down only). Adjust A1 master output to 0dBm.
a) Group and Channel fader ref. 0dB (set Balance control to "0")
b) Switched input gain control 0dB
Pressing the PFL button will show PPM "4" or VU -4dB on RH meter. Increase input
level by 4dB via A1 control channel, Peak LED will illuminate. Release PFL, reduce
input to 0dBm.
c) Press L and R and CH ON button. (M44 Press 1-2 or 3-4 or LR +CH ON) This will give
approximately +2dBm (PPM "4 1/2" VU -2dB) on group meters. No change will be
observed in MONO mode. A similar procedure can be used for Phono input, but input
level via A1 should be reduced to approximately 9 o/c to give 0dBm on PFL meter.
To test Balanced Line inputs: L1 and L2 are Left and Right channels respectively.
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