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Owner’s Manual
Owner’s Manual
Live performance system
This diagram shows a guitar connected to channel 1, plus a stereo synth and drum machine connected
to channels 2 & 3. A turntable is connected to the phono inputs on channel 4. Use the left aux send to
connect to a Mackie SRM450 for stage monitoring. The U.420 will automatically sum the stereo signal to
mono if you use the left aux output only.
The main outputs are fed to a pair of Mackie SRM450s for the audience’s listening pleasure. The
mixer’s Big Knob controls their volume. The headphone out has its own level control, independent of the
Big Knob.
A laptop is connected via FireWire. The U.420 provides stereo mains to the computer for recording
with most DAW applications like Tracktion, Cubase or Sonar. Perfect for recording your set. Any play-
back software applications like Ableton Live or Tracktor can easily be part of your performance by utiliz-
ing the FireWire stereo return that has its own mix level control into the mains.
The FireWire loop through switch on the top of the mixer allows you to send your FireWire return
through the FireWire output for recording. So use Ableton Live and your analog inputs to perform, and
record it all at the same time on Tracktion or your DAW of choice. The switch should be pressed in to
allow loop through of the FireWire return to the FireWire record output.
GND
PHONO
R
1234
R
L
POWER
18V,1.5A
OUT
MAIN
OUT
AUX
(MONO)
R
L
(MONO)
L
R
L
(MONO)
L
(MONO)
L
R R
ground wire
Turntable with phono-level out
Keyboard
Drum machine
Guitar
SRM450
Powered
Speakers
SRM450 Powered
Stage Monitor
Headphones
Laptop