User Manual
Qu Mixer Reference Guide  14   AP9372 iss.8 
5.2  Local Output Connections 
Group, Mix, Matrix outputs – Balanced XLR line 
level outputs for the mono and stereo mixes, for example to 
feed monitor amplifiers, external processing devices, delay 
fill speaker systems and recording devices. These use low 
impedance, high quality differential driver circuits for 
connection to +4 or 0dBu equipment. Maximum output is 
+22dBu. 
Professional equipment provides ‘balanced’ connections for 
maximum interference rejection over long cable runs. If you 
are connecting to ‘unbalanced’ equipment then make sure 
the XLR pin 3 (signal cold) is linked to pin 1 (signal ground). 
Main LR output – Balanced XLR line level outputs for 
the main Left and Right stereo mix. These typically plug into 
the FOH speaker processor, amplifier or powered speakers. 
AES out – 2-channel digital output using a single XLR 
connection and standard mic (2-core screened) audio cable. 
It follows the AES (Audio Engineering Society) digital audio 
standard and can connect to any equipment fitted with an 
AES input socket. The source to this output is patched using 
the Setup / Output Patch / Surface screen. Applications 
include the feed to a PA speaker processor, amplifier, stereo 
broadcast or recording device equipped with AES input. 
Alt out – Stereo ‘alternative’ output on balanced TRS 
jacks for connection to +4 or 0dBu equipment such as zone 
feeds, fill speakers, broadcast or local monitor. The source 
to this output is patched using the Setup / Output Patch / 
Surface screen. 
2TRK out – Stereo output on balanced TRS jacks for 
connection to +4 or 0dBu equipment such as stereo 
recorders. It follows the post master fader main LR mix. 
5.3  Other Connections 
Lamp – Plug in a 4-pin gooseneck lamp to illuminate the 
mixer surface. You can use any industry standard 12V, 5W 
or lower power lamp. We recommend the Allen & Heath 
LEDLamp with built-in thumbwheel dimmer. 
USB B – Type B USB connection for multi-channel 
bi-directional audio streaming between the mixer and a 
computer. Follows the high speed USB 2.0 standard. 
Refer to the Allen & Heath web site for information on 
Windows
®
 and Apple
®
 Mac drivers available for Qu. 
Network – Fast Ethernet (100 Mbit/s) port for Cat5 cable 
connection to a computer for MIDI over TCP/IP control of 
mixer parameters, or to a wireless router (access point) for 
live mixing control using the Allen & Heath Qu-Pad app 
running on an iPad, and Qu-You personal monitoring app. 
The Lnk indicator flashes to indicate network activity. 
dSNAKE – The proprietary Allen & Heath ‘digital snake’ 
connection for remote audio using an AR2412, AR84 or 
AB168 AudioRacks, and for personal monitoring using the 
ME Personal Mixing System. 
Pin2 = hot 










