Numark C3USB, Quick Start Manual

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20.

FADER START 

– When activated, the 

crossfader will send play and cue digital pulse 
commands to compatible fader-start devices 
connected to the rear panel. To take advantage 
of fader start, connect your mixer to a fader-start 
compatible device, using standard 1/8” stereo 
cables. When you move the crossfader toward 
the active channel, the attached device will start.  
When it is moved away, the device will cue 
(similar to pressing the cue button) or stop, 
depending on the device being used.  

21.

MASTER FADER 

– This control adjusts the 

output volume of the Program mix. 

22.

STEREO / MONO 

– Allows you to output the 

Program mix as a mono or stereo signal, 
depending on your application.  Some amplifier 
or speaker systems may require a mono input. 

23.

PANNING:

 Adjusts the Program mix in the left-

right panorama.  As the knob is moved to the 
right, the left side of the signal is attenuated and 
vice versa. 

Note:

 This setting affects Master, Record, and 

Zone outputs.

24.

METER ASSIGN 

– Determines whether PFL or 

MASTER audio level is sent to the stereo LED 
meter.   

25.

STEREO LEVEL INDICATOR 

– Quickly and 

accurately tracks audio levels.  The functionality 
of the level indicators is determined by the 
METER ASSIGN button.   

ƒ

When using as a MASTER output meter, 

set the crossover, equalizer and power amp 
inputs to avoid distortion at each step in the 
audio chain. Proper attention to the peak 
meter results in the punchiest possible sound 
without audible distortion.  

ƒ

When used to adjust PFL levels,

 PFL cue 

signal is sent to the meter through the CUE 
ASSIGN buttons.  Accurately match channel 
levels with the Pre-fader gain and EQ controls 
before mixing them together.   

26.

ZONE 

– Controls the audio level of the Record / 

Zone outputs.  

Tip: 

The Record / Zone outputs can be used to 

supply line-level audio to a lighting controller or 
sound-activated lighting system. 

REAR PANEL OVERVIEW 

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1.

PHONO INPUTS 

– Connect phono-level 

turntables to these inputs.  Since these inputs 
provide additional amplification, connect 

only

phono-level turntables; connecting line-level 
devices to these inputs could result in damage to 
your equipment (and your ears).    

2.

GND 

– If using phono-level turntables with a 

grounding wire, be sure to connect the grounding 
wire to these terminals.  If you experience a low 
“hum” or “buzz”, this could mean that your 
turntables are not grounded. 

Note

: Some turntables have the grounding wire 

built into the RCA connection and, therefore, 
nothing needs to be connected to the grounding 
terminal. 

3.

LINE INPUTS 

– Connect line-level devices, such 

as CD players, Tape Decks or Samplers, to these 
inputs.   

4.

MICROPHONE INPUTS 

– Connect ¼” 

microphones to these inputs.   

5.

FADER START CONNECTOR 

– If you would like 

to use fader-start to automatically start and cue 
music from external devices via the C3USB 
crossfader, connect these outputs to your fader-
start compatible device.  You can use a standard 
1/8” stereo cable to make this connection. 

6.

RECORD OUTPUT (RCA) 

– Connect this output 

to a CD burner or audio recorder.  Alternatively, 
you may connect this output to an additional 
speaker system for mix monitoring.  The level of 
this output is controlled with the ZONE knob on the 
top panel.  

7.

ZONE OUTPUT (RCA) 

– Connect this output to 

external monitoring device such as a PA system, 
powered monitors or a home stereo. Alternatively, 
you can connect this output to a CD burner or 
audio recorder.  The level of this output is 
controlled with the ZONE knob on the top panel.  

8.

MASTER OUTPUT (RCA) 

– Connect this output 

to a PA system, powered monitors or a home 
stereo.  The level of this output is controlled with 
the MASTER fader on the top panel.  

9.

MASTER OUTPUT (XLR) 

– Connect this low-

impedance XLR output to a PA system or powered 
monitors.  The level of this output is controlled with 
the MASTER fader on the top panel. 

10.

USB 

– These USB connections send and receive 

audio from a connected computer.  The 
functionality of each port (send or receive) 
depends on the position of the corresponding USB 
SELECT switch.