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Manual-3
Front Panel Description
1
 
MIC LEVEL
 control:
 Adjusts the Level of the 
MIC
 Input. The 
OL
 (overload) indicator lights when the maximum mic level has 
been reached, 3 dB before clipping. If this lights up, either turn the MIC LEVEL down, or stop yelling.
2
 Program 
INPUT
 selectors:
 Provide selection of 
LINE 1
LINE 2
USB 1
 or 
USB 2
 Inputs for each of the 
PROGRAM A
 or 
PROGRAM B
 channels. 
LINE
 Inputs may each be set for 
PHONO
 or 
LINE
 level via the rear panel switch (see Rear Panel 6).
3
 Program 
LOW
 and 
HIGH
 tone controls:
 adjust the equalization for each of the 
PROGRAM
 channels. Pointing these controls 
straight up at their center detents takes the tone controls out of the signal path. This is not designed to be the only equalizer in the 
system, this is intended to provide EQ between varying program materials. We recommend an external graphic equalizer for the 
best system sound, connected between the 
HOUSE OUTPUTS
 and the amplifier.
4
 Program 
LEVEL
 controls:
 set the volume of each 
PROGRAM INPUT
, as you would expect! These controls are pre-Crossfader, so 
both Program Level controls also depend on the Crossfader setting (see 6).
5
 Program meter:
 This four-segment meter shows signal presence (at -24), optimum signal level (at around 0), and a warning to 
turn down the associated LEVEL control if the +12 indicator lights up.
6
 Active Crossfader:
 Controls the mix of 
PROGRAM A
 and 
B LEVELS
 in a logical manner. When the Crossfader is all the 
way left, only 
PROGRAM A
 is heard. When it's all the way right, only 
PROGRAM B
 is heard. When it's in the middle, both 
PROGRAM A
 and 
B
 are mixed together equally. This is an Active Crossfader™ which uses a VCA to deliver an extended life with 
reduced travel noise, but to insure trouble-free operation, see Fader Cleaning on page Manual-4.
7
 
HOUSE LEVEL
 control:
 Adjusts the Output Level of the Main-mix to the 
HOUSE
 Outputs.
8
 
CUE
 switches: 
Select Program 
A
 or 
B
 in any combination to the 
PHONES
. The associated yellow indicator lights when a 
CUE
 is 
activated and pressed in. Depressing a button sends Program signals to the 
CUE
 side of the 
PAN
 control. For example, when the 
Crossfader is to the left (playing Program A to the House), listen to 
CUE B
 (Program B) on the headphones to audition, match 
beats or prepare a starting point.
9
 
PAN
 control:
 Changes the relative levels of the Cue and Program mixed together in stereo to the 
PHONES
. Adjust this control 
anywhere between Program and Cue: 
PGM
 follows the Main-mix (House) Output. 
CUE
 is determined by the 
CUE
 switches and only goes to the headphones.
0
 
PHONES LEVEL
 and headphone jack:
 As you guessed, plug your headphones in here and adjust the overall volume with the 
LEVEL
 control. 
CUE
 8 and 
PAN
 9 select the source.
q
 
POWER
 indicator:
 Illuminates to let you know the MP 4 is plugged in and ready to go.
OL
MIC LEVEL
A LEVEL
B LEVEL
LEVEL
LOW
10
8
6
4
0
2
LOW
HIGH
HIGH
0
2
4
6
10
8
LINE
USB
LINE
USB
INPUT
INPUT
PGM
CUE
A
B
MP 4
MIXER
A
PROGRAM A
PROGRAM B
CUE
PHONES
MIC
B
PAN
HOUSE
LEVEL
POWER
1
2
2
1
1
2
2
1
10
0
2
4
8
6
10
0
2
4
8
6
10
0
2
4
8
6
10
0
2
4
8
6
10
0
2
4
8
6
0
–24
–12
+12
–12
+12
–12
+12
–12
+12
–12
+12
0
-24
-12
+12
1
7
9
6
8
10
11
2
2
3
3
4
4
5
5