6
U.420 4-Channel Line Mixer
U.
4
20 4-Channel Line Mix
er
Hookup Diagrams
Production studio
This diagram shows a stereo synth, and a drum machine connected to channels 1 & 2, and a turntable
connected to the phono inputs of channel 4. The stereo aux output sends signals to the effects/sampler,
and the wet signal is returned into channel 3.
The main outputs are fed to a pair of Mackie HR studio monitors for control room listening, and 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 record-
ing with most DAW applications like Tracktion, Cubase, or Sonar. This is independent of the Big Knob
as well. Additionally, there is a stereo return from the laptop that has its own mix level control into the
mains.
The FireWire loop through switch on the top of the mixer makes overdubbing a breeze. In its normal
out position, you can play back the mix from your DAW and it will not create a feedback loop. Only the
analog inputs 1-4 will be available for recording. Track it!
Oh, and don’t forget this FireWire return can be used for any playback software application like
Ableton Live, Tracktor, or iTunes.
GND
PHONO
R
1
2
3
4
R
L
POWER
18V,1.5A
OUT
MAIN
OUT
AUX
(MONO)
R
L
(MONO)
L
R
L
(MONO)
L
(MONO)
L
R
R
Headphones
ground wire
Turntable with phono-level out
Laptop
Keyboard
Drum machine
HR824
Powered
Monitors
Effects/ Sampler
