Owner's Manual
24. GROUP PFL SWITCHES
These
PFL
switches allow the operator to monitor the entire
GROUP mix. If
distortion is heard or if
the PFL level is near
PEAK
on the Master L/R METERS, lower the channel faders
assigned to that group. Also check the channel PEAK
LEDs.
25. GROUP ASSIGNMENT SWITCHES
These switches send the sub-group mix to the main L/R faders.
For mono mixing, assign to both L/R.
26. COMP 1-4 GROUP COMPRESSORS
/ LEDs
Each of the 4 sub groups features a compressor, which will
reduce the output when it gets above the level you set with
the COMP control. Set at “0” there is no effect.
As you turn UP the COMP knob, the lower the
maximum level. The compressor circuit is
pre-fader, so you can set the COMP once and
still adjust the group fader as needed. The LED
will indicate when the compressor is working.
27. COMP LINK SWITCHES
These switches link the COMP controls for
stereo pairs of equal setting. The COMP1 or
COMP3 control becomes the master for the
pair. Link 1-2 or 3-4.
28. MASTER L/R FADERS
These faders adjust the level of the main stereo
output created by all channels and groups
assigned to L/R faders. Output appears at the
L/R balanced XLR connectors
(#44)
.
29. MONO/SUB CONTROL
A mono output is created from the
L/R
master
faders (post) for center, subwoofers, or side
fill speakers. The output is at the MONO/SUB
XLR connector (#45).
30. REC OUT/USB CONTROL
This control sets the level sent to REC OUT
L-R RCA jacks and to the rear USB port. The
signal source is the main L-R mix (pre-fader).
31. HEADPHONE AND METER
SOURCE
The stereo PHONES control sets the level
of the PHONES jack (#42). The PFL, L/R,
MONO, MON 1-MON 6, USB IN, and REC OUT
USB switches allow for monitoring of these
sources through the headphones and the L/R
LED METERS (#33).
32. PFL RED LED
Indicates that the headphone & meters are
monitoring only the channels or groups
where the PFL is switched on.
33. L/R LED VU METERS
This group of 10 LED’s offer 6 dB increment
resolution that give the operator a visual indica-
tion of the mixer’s output levels, selectable by
the METER SOURCE or PFL switches
(#31).
34. DUAL PRECISION 9 BAND GRAPHIC EQs
are one octave filters at 60,125, 250, 500, 1k, 2k, 4k, 8k &
16k Hz centers that offer ±12dB adjustment to help eliminate
feedback & enhance tone for the main or monitor mix.
35. EQ SWITCH 1 & 2
These switches swap the 9 band EQ’s from the standard L/R
main outputs “OUT” to the MON 1 & MON 2 outputs “IN”
respectively.
36. USB POWER PORTS
Use these ports to supply +5V USB power to run accessories
like LED lighting or to charge MP3 players. Connect audio
outputs to RETURNS 3 or 4, or to channel inputs.
37. POWER BLUE LED
Verifies the mixer is on.
38. EFFECTS 1 & 2 OUTPUT JACKS
1/4” outputs drive external effects. Connect your effects
processor’s inputs to these jacks.
39. RETURNS 3 & 4 L-R INPUT JACKS
Returns a stereo signal from an external effect. Connect
your effects processors’ stereo outputs to these jacks. If only
one jack is used, the mono signal will go to both L/R .
40. MONITOR 1-6 XLR OUTPUT
CONNECTORS
The C48 SERIES provides balanced XLR outputs. Connect your
monitor power amps to these connectors.
41. GROUP 1-4 OUTPUT JACKS
The C48 SERIES provides 4 balanced 1/4” outputs. Connect
your 4-track recorder or side fill power amps to these jacks.
42. HEADPHONE JACK
1/4” stereo jack for headphone or control room output.
43. REC OUT L-R RCA JACKS
RCA jacks for connecting to a recorder input.
44. LEFT & RIGHT XLR OUTPUT CONNECTORS
This set of balanced XLR connectors are for connecting the
main L/R output to power amps or recording gear.
45. MONO/SUB XLR OUTPUT CONNECTOR
A balanced XLR output is featured for side fills or subwoof-
ers.
46. REAR USB CONNECTOR
This rear USB connector will transmit audio to and from a
computer for recording with compatible software and driv-
ers. Output signal is the pre-fader L-R stereo mix sent via the
REC OUT USB LEVEL. Input from a computer comes into the
RETURN 4 bus, controlled at the RTN4/USB control.
3
CONCERT 48 SERIES BLOCK DIAGRAM
1
17
40
41
2
3
4
5
7
8
9
10
11
12
13
14
16
6
43
42
45
36
25
28
39
46
38
6
15
44
35
37
33
22
30
31
32
34
29
26
27
24
23
18
20 2119
19, 20, 21