Crest Audio CPM 2462, Operating Manual

CHANNEL 9 — 16 AND 17 — 24 (BACK PANEL CONNECTIONS)

37. MICROPHONE 

INPUT

The MICROPHONE INPUT is an XLR balanced input for a low impedance 
microphone. Pin 2 is the positive input.

38. 

STEREO LINE INPUT

These two 1/4" (TS) unbalanced line inputs LEFT/MONO and RIGHT are for 
high level, line signals. If there is no 1/4" jack plugged into the RIGHT input, 
the signal from the LEFT/MONO jack is applied to both L and R inputs. On 
the stereo Channels 15 and 16, if selected, the LINE INPUT signals are sent 
directly to the L and R sub-channels. 

CHANNEL 9 — 16 AND 17 — 24 (FRONT PANEL FEATURES)

39. GAIN

The GAIN CONTROL varies the gain of the microphone input to allow a 
wider input dynamic range. The gain adjustment range is +10 dB to 
+50 dB. Proper adjustment of the mic gain will maximize the signal to 
noise ratio. It can be set by depressing the PFL switch (35) and adjusting
for a 0 dB level at the R meter.

40. 

CHANNEL 17 — 24 ASSIGNMENT SWITCH

This switch determines how the stereo line inputs are routed. In the out 
position, the signal is routed to sub-group 5/6. When the switch is 
depressed, the mic input on the corresponding input channel (9 - 16) is 
muted and the line signal is routed through that channel. On channels 9 -
14, the signal is summed mono. On channels 15 and 16, the stereo 
signal is maintained.

41. 

LINE INPUT LEVEL

The line input level control adjusts the stereo line input from (-) infinity to 
unity gain at the center detent, and to +6 dB at the full clockwise position.
When assigned to group 5/6, this control is the input mix 
control. When routed through the corresponding channel 
strip, this control serves as the input trim control.

42. 

MID (dB) EQ

This bandpass (boost/cut) active tone control varies the 
mid-frequency /-15 dB with a fixed center 
FREQUENCY of 800 Hz.

(All remaining controls and features are identical with those on Channels 1-8.)

CHANNEL 15 AND 16 (STEREO CHANNELS)

These two channels are full stereo channels with two separate L and R sub-channels
each. All controls and functions are identical with those on Channels 9 — 14 with the
following exceptions:

43. AUX 

1/2

AUX 1 adjusts the level of the channel’s LEFT pre-fader signal that 
is added to AUX 1 mix. AUX 2 adjusts the level of the channel’s RIGHT pre-
fader signal that is added to AUX 2 mix. Unity gain at the center detent 
position and +10 dB of gain in maximum.

16

39

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37

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