ALLEN & HEATH Qu-24 User manual

For firmware V1.7
Check www.allen-heath.com for the latest firmware available
Publication AP9372
Qu Series Reference Guide

Qu Mixer Reference Guide 2 AP9372 iss.7
Qu Series products comply with the European Electromagnetic
Compatibility directive 2004/108/EC and the European Low Voltage
directive 2006/95/EC.
Any changes or modifications to the product not approved by Allen & Heath
could void the compliance of the product and therefore the users authority to
operate it.
Qu Series Reference Guide AP9372 Issue 7
Copyright © 2015 Allen & Heath. All rights reserved
Allen & Heath Limited, Kernick Industrial Estate, Penryn, Cornwall, TR10 9LU, UK
http://www.allen-heath.com
Limited One Year Manufacturer’s Warranty
Allen & Heath warrants the Allen &Heath -branded hardware product and accessories contained in the
original packaging ("Allen & Heath Product”) against defects in materials and workmanship when used
in accordance with Allen & Heath's user manuals, technical specifications and other Allen & Heath
product published guidelines for a period of ONE (1) YEAR from the date of original purchase by the
end-user purchaser ("Warranty Period").
This warranty does not apply to any non-Allen & Heath branded hardware products or any software,
even if packaged or sold with Allen & Heath hardware.
Please refer to the licensing agreement accompanying the software for details of your rights with
respect to the use of software/firmware (“EULA”).
Details of the EULA, warranty policy and other useful information can be found on the Allen & Heath
website: www.allen-heath.com/legal.
Repair or replacement under the terms of the warranty does not provide right to extension or renewal
of the warranty period. Repair or direct replacement of the product under the terms of this warranty
may be fulfilled with functionally equivalent service exchange units.
This warranty is not transferable. This warranty will be the purchaser’s sole and exclusive remedy and
neither Allen & Heath nor its approved service centres shall be liable for any incidental or
consequential damages or breach of any express or implied warranty of this product.
Conditions Of Warranty
The equipment has not been subject to misuse either intended or accidental, neglect, or alteration
other than as described in the User Guide or Service Manual, or approved by Allen & Heath.
Any necessary adjustment, alteration or repair has been carried out by an authorised Allen & Heath
distributor or agent.
The defective unit is to be returned carriage prepaid to the place of purchase, an authorised Allen &
Heath distributor or agent with proof of purchase. Please discuss this with the distributor or the agent
before shipping. If the unit is to be repaired in a different country to that of its purchase the repair may
take longer than normal, whilst the warranty is confirmed and parts are sourced. Units returned should
be packed in the original carton to avoid transit damage.
DISCLAIMER: Allen & Heath shall not be liable for the loss of any saved/stored data in products that
are either repaired or replaced.
Check with your Allen & Heath distributor or agent for any additional warranty information which may
apply. If further assistance is required please contact Allen & Heath Ltd.
ALLEN&HEATH

Qu Mixer Reference Guide 3 AP9372 iss.7
IMPORTANT -Read these instructions before starting:
Safety instructions
Before starting, read the Important Safety Instructions printed on the sheets supplied with the
equipment. For your own safety and that of the operator, technical crew and performers, follow
all instructions and heed all warnings printed on the sheet and on the equipment panels.
System operating firmware
The function of the Qu mixer is determined by the firmware (operating software) that runs it.
Firmware is updated regularly as new features are added and improvements made. The
firmware version current when this guide was released is noted in the Contents section.
The latest firmware can be downloaded from the Allen & Heath website, transferred to USB key
and then loaded into the Qu mixer using the Firmware Update utility.
Check the Allen & Heath website for the latest version of Qu firmware.
Software licence agreement
By using this Allen & Heath product and the software within it you agree to be bound by the
terms of the relevant End User Licence Agreement (EULA), a copy of which can be found on
the Allen & Heath website ( www.allen-heath.com/legal ). You agree to be bound by the terms of
the EULA by installing, copying, or using the software.
Further information
Please refer to the Allen & Heath website for further information, knowledgebase and technical
support. You can join our Allen & Heath Digital Community to share knowledge and information
with other Qu users.
General precautions
To prevent damage to the controls and cosmetics, avoid placing heavy objects on the
control surface, obstructing movement of the motorised faders, scratching the surface or
touch screen with sharp objects, or rough handling and vibration.
Protect the equipment from damage through liquid or dust contamination. Avoid dust or
small objects getting into the fader slots. Cover the mixer when it is not being used for a
long period.
Computer and touch screen technology can be affected by extreme cold. If the
equipment has been stored in sub-zero temperatures allow time for it to reach normal
operating temperature before use at the venue. Recommended operating temperature
for Qu is 5 to 35 degrees Celsius.
Avoid using the equipment in extreme heat and direct sunlight. Make sure the mixer
ventilation slots are not obstructed and that there is adequate air movement around the
equipment.
Transport the Qu using a touring grade, purpose designed flightcase with adequate
foam lining and internal support for protection.
Clean the control surface with a soft brush and dry lint-free cloth. Do not use chemicals,
abrasives or solvents.
It is recommended that servicing is carried out only by an authorised Allen & Heath
agent. Contact details for your local distributor can be found on the Allen & Heath
website. Allen & Heath do not accept liability for damage caused by maintenance, repair
or modification by unauthorised personnel.

Qu Mixer Reference Guide 4 AP9372 iss.7
1. Packed contents
Options and Accessories available
Qu-Pad app for iPad
Qu-You app for iOS devices
Available from the Apple Store
Full mix control Personal monitoring
Cat5 cables
For use with dSNAKE remote
audio
AH8823 2m (6.6’) short patch
AH9651 20m (66’) coil
AH9981 50m (165’) drum
AH9650 100m (330’) drum
Qu Mixer
Mains lead •Check this
is correct for your territory
Qu-16/24/32 Guide AP10025 or
Qu-Pac Guide AP9815
REGISTER YOUR PRODUCT online at: www.allen-heath.com/register
Remote Audio Racks
Provides remote audio over dSNAKE Cat5 cable digital snake.
AR2412 24 Mic/Line in, 12 Line out AR84 8 Mic/Line in, 4 Line out
Part: GLD-AR2412 Part: GLD-AR0804
AB168 16 Mic/Line in,
8 Line out Remote
AudioRack.
Part: AB1608
Soft cover
AP9262 Qu-16
AP9458 Qu-24
AP9639 Qu-32
Qu
LEDlamp
Right angled 4-pin
XLR LED lamp with
built-in dimmer
Part: LEDlampX
Safety Sheet
AP9240/CL-1
•Read this before starting
ME Personal Mixing System
ME-1 Personal Mixer
ME-U 10-port PoE hub
19” Rack Ear Kit for Qu-16
To mount the Qu-16 in a standard 19” rack or
flightcase. These fit over the plastic trims.
Part: QU-16-RK19
Polyester carry bag
Qu-16 AP9931
Qu-Pac AP9933

Qu Mixer Reference Guide 5 AP9372 iss.7
2. Contents
1. Packed contents..............................................................................................................................4
2. Contents ..........................................................................................................................................5
3. Introduction......................................................................................................................................7
3.1 Overview and Features ...........................................................................................................7
3.2 System Architecture and Processing ......................................................................................8
3.3 Differences between the Qu models .......................................................................................9
4. Connection Overview.....................................................................................................................12
4.1 Local Input Connections .......................................................................................................12
4.2 Local Output Connections .................................................................................................... 13
4.3 Other Connections................................................................................................................ 13
4.4 Powering up the mixer ..........................................................................................................14
5. Connecting dSNAKE Remote Audio.............................................................................................. 15
5.1 Connecting to a remote AudioRack ......................................................................................15
5.2 Qu Systems ..........................................................................................................................17
5.3The ME Personal Mixing System ..........................................................................................19
6. Qu-16, 24, 32 Operational Overview.............................................................................................. 20
6.1 Fader Strips...........................................................................................................................20
6.2 The Master Strip.................................................................................................................... 22
6.3 Working with the sends on faders:........................................................................................23
7. Qu-Pac Operational Overview ....................................................................................................... 24
8. Processing and Mix Functions....................................................................................................... 26
8.1 Channel Naming ...................................................................................................................26
8.2 Channel Processing..............................................................................................................27
8.3Working with the Processing: ...............................................................................................27
8.4 Working with Processing Libraries:....................................................................................... 27
8.5 Processing Libraries .............................................................................................................34
8.6 List of Factory Libraries.........................................................................................................35
8.7 Channel Routing ...................................................................................................................36
8.8 Working with the Routing screens ........................................................................................36
8.9 Working with the Groups (not Qu-16) ...................................................................................37
8.10 Working with the Matrix (not Qu-16) ..................................................................................... 38
8.11 Mute and DCA Groups..........................................................................................................39
8.12 Using Mute Groups............................................................................................................... 40
8.13 Using DCA Groups ............................................................................................................... 41
9. Touch Screen Mixing Functions ....................................................................................................42
9.1 Copy, Paste, Reset keys ....................................................................................................... 44
9.2 The Sel screens –Processing and Routing .......................................................................... 45
9.3 Home Screen ........................................................................................................................45
9.4 Home Screen –User.............................................................................................................46
9.5 Home Screen –Meters .........................................................................................................47
9.6 Home Screen –RTA..............................................................................................................47
9.7Home Screen –Qu-Drive (USB audio).................................................................................. 47
9.8 The FX................................................................................................................................... 50
9.9 Working with FX –Adding vocal reverb: ............................................................................... 52
9.10 Scene Memories ...................................................................................................................53
10. Touch Screen Setup Functions .....................................................................................................56

Qu Mixer Reference Guide 6 AP9372 iss.7
10.1 Audio Setup -PAFL................................................................................................................ 56
10.2 Audio Setup - Talkback.........................................................................................................57
10.3 Audio Setup –Signal Generator ............................................................................................57
10.4 Control Setup –Custom Layer..............................................................................................58
10.5 Control Setup - SoftKeys.......................................................................................................59
10.6 Control Setup - Network........................................................................................................60
10.7 Control Setup - MIDI .............................................................................................................60
10.8 Control Setup - Preferences.................................................................................................. 61
10.9 USB Data –Scene Transfer .................................................................................................. 62
10.10 USB Data –Library transfer................................................................................................... 62
10.11 USB Data –Show transfer..................................................................................................... 63
10.12 I/O Patch Setup –Surface.....................................................................................................64
10.13 I/O Patch –dSNAKE In.......................................................................................................... 64
10.14 I/O Patch Setup –dSNAKE Out ............................................................................................65
10.15 I/O Patch Setup - Monitor......................................................................................................66
10.16 I/O Patch Setup –USB Audio................................................................................................67
10.17 Utility - Calibration.................................................................................................................68
10.18 Utility –Qu-Drive ...................................................................................................................68
10.19 Utility –Firmware Update ......................................................................................................69
11. Working with Audio Streaming and a DAW ...................................................................................70
12. Qu-Pac Qu-Control Screen............................................................................................................ 72
13. iOS Apps for Wireless Control .......................................................................................................73
14. Resetting the Mixer ........................................................................................................................76
14.1 Reset Mix Settings –A starting point for mixing ....................................................................76
14.2 System Hard Reset ...............................................................................................................77
15. Specifications ................................................................................................................................ 78
15.1 Installing Qu-16, Qu-24, Qu-32 .............................................................................................78
15.2 Installing Qu-Pac...................................................................................................................79
15.3 Qu-16 System Block Diagram...............................................................................................80
15.4 Qu-24 and Qu-32 System Block Diagram.............................................................................81
15.5 Qu-Pac System Block Diagram............................................................................................. 82
15.6 System Specifications...........................................................................................................83
About this guide
This is the Reference Guide for the Allen & Heath Qu-16, Qu-24, Qu-32
and Qu-Pac digital mixers.
Please Note
This guide refers to Qu firmware V1.7. Please refer to the Allen &
Heath website for the latest version of firmware and this reference
guide. For more details read the Release Notes available with the
firmware.
Getting Started guides are also available for Qu mixer models.
For information on the AR2412, AR84 and AB168 remote AudioRacks
please refer to their user guides.

Qu Mixer Reference Guide 7 AP9372 iss.7
3. Introduction
3.1 Overview and Features
Building on the heritage of the GLD and flagship iLive digital consoles, the Qu presents exceptional
performance together with an intuitive analogue style user interface with a motorised fader per channel,
knobs and touch screen, total recall of all settings, full input, output and FX processing, USB streaming
and hard drive multitrack recording, digital snake capability and remote wireless control using an iPad.
There are four models in the Qu Digital Audio Mixer Series:
Qu-16 –Compact, rack mountable mixer with 16 mic and 3 stereo line input channels.
Qu-24 –Larger model with 24 mic and 3 stereo inputs. Adds stereo Groups, Matrix and more SoftKeys.
Qu-32 –Largest model with 32 mic and 3 stereo inputs. Adds 2 more stereo Groups.
Qu-Pac –Rack mountable version of the Qu-32 without faders, for iPad control.
Qu-16 Qu-24 Qu-32 and Qu-Pac
16 Mic/Line channels 24 Mic/Line channels 32 Mic/Line channels
3 stereo Line channels 3 stereo Line channels 3 stereo Line channels
24 sources to the mix 32 sources to the mix 40 sources to the mix
12 mixes (4 mono, 3 stereo, LR) 12 mixes (4m, 3st, LR) 12 mixes (4m, 3st, LR)
4 FX (2 send buses) 4 FX (4 send buses) 4 FX (4 send buses)
4 SoftKeys 10 SoftKeys 10 SoftKeys
24 out, 22 in USB streaming 32 out, 30 in USB 32 out, 32 in USB
2 stereo Groups 4 stereo Groups
2 stereo Matrix 2 stereo Matrix
All models
Extra stereo outputs –AES digital, Alt Out, 2TRK out
Talkback mic input
dSNAKE Cat5 snake for remote audio using AR2412, AR84 or AB168
4 Mute Groups, 4 DCA Groups
AnaLOGIQ™ total recall analogue preamps
Effects ported from flagship iLive console, with dedicated return channels
Master strip for quick access to mix levels and processing
Input channel linking for stereo sources
Input processing –Preamp, HPF, Ducker, Gate, PEQ, Compressor, Delay
Output processing –PEQ, Graphic EQ, Compressor, Delay
800x480 pixel colour touch screen for quick control
Motorised faders for sends on faders, GEQ fader flip and mix recall
Quick copy and reset of processing, mixes and scenes
100 Scene memories
Channel Safes, Global and per Scene Recall Filters
FX, processing and channel User Libraries
Qu-Drive for stereo and 18-track recording/playback to USB hard drive
USB streaming to/from an Apple®Mac or Windows™PC computer
MIDI DAW Control driver for Mac (converts to HUI or Mackie Control)
USB transfer of Scenes, Libraries, Shows
User assignable Custom Layer
Qu-Pad engineer’s mixing wireless remote app for iPad
Qu-You personal monitoring app for iPhone, iPad, iPod Touch
Compatible with the Allen & Heath ME personal mixing system
User Permissions to restrict operator access
Qu-Control screen for installed sound control (Qu-Pac only)

Qu Mixer Reference Guide 8 AP9372 iss.7
3.2 System Architecture and Processing
The following diagrams show the Qu-16, Qu-24 and Qu-32, and the Qu-Pac I/O (inputs and
outputs), audio architecture and processing available. The difference between the models and the
routing capability of each processing section is illustrated. Refer also to the more detailed System
Block Diagrams at the rear of this guide.
Mic
Line
L/M
R
Mic/Line Inputs
ST1
L/M
R
ST2
ST3
L/R
Mic
Talkback
Line Inputs
1 ------ 24(32) Qu-Drive
USB B
Stream Stream
30 ch 32 ch
Playback
LR, 18 trk
SIGNAL FLOWQu-24(32)
Local Inputs dSNAKE USB
Record
LR, 18 trk
PREAMP
GAIN
48V
POL
0
TRIM HPF GATE PEQ COMP DELAY
FX
Insert MUTE L R
PAN
FADER
Channel SOURCE
ASSIGN
GRP
LR
MIX Sends
PAFL
PRE/POST
SENDS FX Sends
DIR OUT
Input Channels 1-24, ST1-3
PEQ COMP DELAY
FX
Insert MUTE FADER ASSIGN
LR
MIX Sends
PRE/POST
SENDS
FX Sends
MTX Sends
Group 1-2, 3-4, (5-6, 7-8)
dSNAKE
GEQ
PEQ COMP DELAY
FX
Insert MUTE FADER
Mono 1-4, Stereo 5-6, 7-8, 9-10 Mix
GEQ
MTX Sends
PEQ COMP DELAY
FX
Insert MUTE FADER
Main LR
GEQ
MTX Sends
L R
PAN
PEQ COMP DELAY
FX
Insert MUTE FADER
Matrix 1-2, 3-4
GEQ
Outputs
Output PATCHMixInputs Masters
Line Outputs
Grp 1---4(8)
L
R
2Trk
L
R
Alt Out
AES Out
Main LR
MTX 1---4
USB dSNAKE
MUTE FADER ASSIGN
PRE/POST
SENDS
FX Send 1-4
FX 1-4
Insert
FX
MUTE L R PAN
FADER ASSIGN
PRE/POST
SENDS
FX Return 1-4
GRP
LR
MIX Sends
FX Sends
PEQ
TALK ASSIGN
TALKBACK GRP
LR
MIX
MTX
GAIN HPF
ASSIGN
SIG GEN GRP
LR
MIX
MTX
LEV
MUTE
DELAY
RTA
PAFL
PHONESPFL TRIM
PAFL MONITOR
Local Outputs
Sine
Pink
White
Bandpass
Mic
Line
L/M
R
Mic/Line Inputs
ST1
L/M
R
ST2
ST3
L/R
Mic
Talkback
Line Inputs
1 ---------- 16 Qu-Drive
USB B
Stream Stream
22 ch 24 ch
Playback
LR, 18 trk
SIGNAL FLOWQu-16
Local Inputs dSNAKE USB
Record
LR, 18 trk
PREAMP
GAIN
48V
POL
0
TRIM HPF GATE PEQ COMP DELAY
FX
Insert MUTE L R
PAN
FADER
Channel SOURCE
ASSIGN
PRE/POST
SENDS
Input Channels 1-16, ST1-3
dSNAKE
PEQ COMP DELAY
FX
Insert MUTE FADER GEQ
PEQ COMP DELAY
FX
Insert MUTE FADER GEQ
Output PATCHMixInputs
Line Outputs
L
R
2Trk
L
R
Alt Out
AES Out
Mix 1-----------10
Main LR
USB dSNAKE
MUTE FADER ASSIGN
PRE/POST
SENDS
FX Send 1-2
FX 1-4
Insert
FX
MUTE
L R
PAN
FADER ASSIGN
PRE/POST
SENDS
PEQ
Local Outputs
Cat5 Digital Snake to AudioRack
Sine
Pink
White
Bandpass
DELAY
RTA
PAFL
PHONESPFL TRIM
PAFL MONITOR
Mix 1---------------10
Cat5 Digital Snake to AudioRack
Route to:
PAFL Route to:
Route to:
Route to:
PAFL Route to:
L R
Output BAL
ASSIGN
PRE/POST
SENDS
Outputs
PAFL Route to:
L R
Output BAL
Outputs
PAFL Route to:
Outputs
PAFL Route to:
PAFL
LR
MIX Sends
PAFL
FX Sends
DIR OUT
LR
MIX Sends
FX Sends
Route to:
PAFL Route to:
FX Return 1-4
TALK ASSIGN
TALKBACK
LR
MIX
GAIN HPF
Route to:
ASSIGN
SIG GEN
LR
MIX
LEV
MUTE
Route to:
PAFL
Mono 1-4, Stereo 5-6, 7-8, 9-10 Mix
Main LR
ASSIGN
PRE/POST
SENDS
L R
Output BAL
ASSIGN
PRE/POST
SENDS
L R
Output BAL
Outputs
PAFL Route to:
L R
Output BAL
Outputs
PAFL Route to:
L R
Output BAL
LR post
LR post

Qu Mixer Reference Guide 9 AP9372 iss.7
3.3 Differences between the Qu models
All four models operate in the same way and have a similar touch screen menu structure. The
larger models add Groups and Matrix. Other differences are shown here:
Qu-16 Qu-24
Shelf for iPad
10 SoftKeys
2 Group masters
2 Matrix masters
Extra FX Send and Group Mix selects
24 fader strips
4 SoftKeys
SoftKeys
16 fader strips
LED colour strips to identify layer
Mic
Line
L/M
R
Mic/Line Inputs
ST1
L/M
R
ST2
ST3
L/R
Mic
Talkback
Line Inputs
1 ------ 16 Qu-Drive
USB B
Stream Stream
32 ch 32 ch
Playback
Stereo, 18 trk
SIGNAL FLOWQu-Pac
Local Inputs dSNAKE USB
Record
Stereo, 18 trk
PREAMP
GAIN
48V
POL
0
TRIM HPF GATE PEQ COMP DELAY
FX
Insert MUTE L R
PAN
FADER
Channel SOURCE
ASSIGN
GRP
LR
MIX Sends
PAFL
PRE/POST
SENDS FX Sends
DIR OUT
Input CH1-32, ST1-3
PEQ COMP DELAY
Insert MUTE FADER ASSIGN
LR
MIX Sends
PRE/POST
SENDS
FX Sends
MTX Sends
Group 1-2, 3-4, 5-6, 7-8
dSNAKE
GEQ
PEQ COMP DELAY
FX
Insert MUTE FADER
Mono 1-4, Stereo 5-6, 7-8, 9-10 Mix
GEQ
MTX Sends
PEQ COMP DELAY
FX
Insert MUTE FADER
Main LR
GEQ
MTX Sends
L R
PAN
PEQ COMP DELAY
FX
Insert MUTE FADER
Matrix 1-2, 3-4
GEQ
Outputs
Output PATCHMixInputs Masters
L
R
2Trk
L
R
Alt Out
AES Out
USB dSNAKE
MUTE FADER ASSIGN
PRE/POST
SENDS
FX Send 1-4
FX 1-4
Insert
FX
MUTE L R PAN
FADER ASSIGN
PRE/POST
SENDS
FX Return 1-4
GRP
LR
MIX Sends
FX Sends
PEQ
TALK ASSIGN
TALKBACK GRP
LR
MIX
MTX
GAIN HPF
ASSIGN
SIG GEN GRP
LR
MIX
MTX
LEV
MUTE
DELAY
RTA
PAFL
PHONESPFL TRIM
PAFL MONITOR
Local Outputs
Sine
Pink
White
Bandpass
Cat5 Digital Snake to AudioRack
Route to:
PAFL Route to:
Route to:
Route to:
PAFL Route to:
L R
Output BAL
ASSIGN
PRE/POST
SENDS
Outputs
PAFL Route to:
L R
Output BAL
Outputs
PAFL Route to:
Outputs
PAFL Route to:
PAFL
ASSIGN
PRE/POST
SENDS
L R
Output BAL
ASSIGN
PRE/POST
SENDS
L R
Output BAL
LR post
Line Outputs
Mix 1-----------10
Main LR
CH17-32, Group and MTX OutputsRemote access to any Input/Output including:
Virtual
Virtual Virtual
Virtual
Virtual
Virtual
Virtual
or Ducker
Trigger
FX or Ducker
Trigger

Qu Mixer Reference Guide 10 AP9372 iss.7
Qu-32
Qu-Pac
Qu-Pac is the mix engine of the Qu-32 in a compact rack mountable format. It has the same local
connections as the Qu-16 and can be expanded to use the additional Qu-32 channels and outputs
by adding dSNAKE AudioRacks. It does not have faders and is intended for iPad wireless control.
However, all channels and functions can also be controlled directly from the front panel using its
touch screen.
32 fader strips
4 Group masters
2 Matrix masters
4 DCA Group masters
Extra 2 Group Mix selects
Larger Touch Screen
15 SoftKeys
Custom assignable Qu-Control screen for installed sound control
Custom assignable Select keys
Channel screen provides selection and virtual fader strip

Qu Mixer Reference Guide 11 AP9372 iss.7
Scene, Library and Show memories - All Qu mixer memories are compatible. Files created on
one model can be transferred via USB key and loaded on the other. The extra features of the
bigger models will be ignored when their file is loaded on a Qu-16. The extra features of the bigger
models will be reset to factory default when a Qu-16 file is loaded.
Note - To be compatible, ensure all your Qu mixers are loaded with the same version of firmware
later. Check the Allen & Heath web site for the latest firmware available.
USB Audio -A USB hard drive formatted on one model can be used on the other. Stereo and
multitrack Qu-Drive recordings are compatible. USB B audio streaming is compatible, but note that
the Qu-16 is 24out/22in, the Qu-24 is 32out/30in, and the Qu-32 and Qu-Pac are 32out/32in.
Firmware -Different firmware is needed for each model. Choose either the Qu-16, Qu-24, Qu-32
or Qu-Pac file when downloading firmware from the Allen & Heath web site. The firmware version
number will be the same for each update that is made available. The procedure for updating
firmware is the same for all models.
Qu-Pad and Qu-You apps -These iOS apps are compatible with all Qu mixers. They identify the
model and load the appropriate controls when you log in.
Note - Make sure the app version and mixer firmware versions are compatible.
Qu-24 24 Mic/Line in
4 Group out
Matrix out
Qu-16 16 Mic/Line
in
32 out, 30 in USB audio streaming
24 out, 22 in USB audio streaming
Qu-32 32 Mic/Line in
8 Group out
Matrix out
32 out, 32 in USB audio streaming
Qu-Pac 16 Mic/Line in
32 out, 32 in USB audio streaming
Use dSNAKE to access up to 32 Mic/Line in and other mix outs

Qu Mixer Reference Guide 12 AP9372 iss.7
4. Connection Overview
The following connections are available on the rear panel of the Qu mixer. The Qu-16 is shown here.
4.1 Local Input Connections
Mono Line Input –Balanced ¼” TRS (Tip, Ring,
Sleeve) jack input for plugging in line level signals such as
multitrack players and radio mic receivers. To work with
unbalanced sources use a mono jack or link ring to sleeve
within the TRS stereo jack.
Use DI boxes plugged into the Mic input for high
impedance, low level sources such as acoustic instrument
pickups.
Microphone Input –Balanced XLR input for plugging
in a low level source such as a microphone or DI box. 48V
can be switched to the socket for condenser mics and active
DI boxes that require phantom power.
Note - To avoid loud thumps, mute the channel before
plugging in cables or equipment while 48V is turned on.
Stereo Line Input –ST1 and ST2 balanced ¼” TRS
(Tip, Ring, Sleeve) jack inputs for plugging in line level
stereo sources such as CD players. The L input normals
(switches) through the R input so that you can work with a
mono source by plugging into just the L/M input.
To work with RCA phono connections use jack to RCA
converter plugs.
Talkback Input –Dedicated balanced XLR input for
plugging in a microphone to route to the mixes for the
engineer to talk to the performers on stage. Phantom power
can be switched to the socket for condenser microphones.
AES digital out
2Trk out
Alt out
LR main out
Lamp
Talkback
Mic in
ST1 and ST2
stereo line in
Analogue Mix outputs
Mic and Line inputs
Network
dSNAKE remote audio
USB B streaming
Kensington
Lock
Cable
clamp
Power On/Off
Mains power input
Mains fuse
Pin2 = hot

Qu Mixer Reference Guide 13 AP9372 iss.7
4.2 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.
4.3 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

Qu Mixer Reference Guide 14 AP9372 iss.7
4.4 Powering up the mixer
The Qu mixer has an internal universal voltage power supply
unit. This means you can use your mixer in most parts of the
world without the need to modify the unit as long the local
mains supply is within the range:
Mains Voltage = 100 to 240 V.AC
Mains Frequency = 47 to 63Hz
Important - Before starting, read the Safety Instructions
Sheet packed with the mixer. These can also be
downloaded from the Allen & Heath website.
Also read the safety notes printed on the rear of the mixer.
AC MAINS IN –Standard IEC socket for connecting the
mixer to the local mains supply. Plug in a mains lead with
moulded plug suitable for your territory. A suitable mains
lead is shipped with the mixer.
Note –Do not replace the mains plug or modify the lead in
any way. For your own safety and that of the operator and
performers do not remove or defeat the ground connection.
A cable clamp is provided. You can slot the cable into this
or lock it in place. To lock the cable use a star head Torx
T20 screwdriver to refit the clamp around the cable.
Fuse –Mains input fuse to protect the mixer circuits in the
unlikely event of a failure or excessive power surge. If you
need to replace the fuse always use one of the same type
and rating as printed on the rear panel. If the replacement
fuse blows then refer to your authorised Allen & Heath
service agent for advice.
Power ON/OFF switch –Press to switch the mixer
on. Press again to switch it off.
Switching the mixer on –Press the ON/OFF switch.
The rear panel blue Power indicator lights. The mixer takes
just a few seconds to boot up. It restores its previous
settings. LR mix is selected and its processing shown on the
screen.
Note –To avoid loud thumps, do not switch the mixer on or
off while the PA speakers are powered. Always switch the
amplifiers on last, and switch them off first.
Switching the mixer off –First select the Home
screen. Touch Shut Down to safely complete processes
such as parameter storing and USB data transfer or
recording. Once complete, press the ON/OFF switch to turn
the mixer off.

Qu Mixer Reference Guide 15 AP9372 iss.7
5. Connecting dSNAKE Remote Audio
The Qu mixer provides local sockets on its rear panel for all audio inputs and outputs. It can also work
with remote audio by connecting over a single cable ‘digital snake’ to an Allen & Heath AudioRack, or to
the Allen & Heath ME Personal Mixing System.
5.1 Connecting to a remote AudioRack
The Qu can connect to an Allen & Heath AudioRack so that the audio can be plugged into a rack on
stage and routed to the mixer over a single Cat5 cable ‘digital snake’ plugged into its dSNAKE port.
The ‘digital snake’ –dSNAKE provides a convenient,
single Cat5 cable alternative to the typical heavy
analogue copper multicore to connect many inputs
and outputs on stage. One cable carries multiple
channels of audio in both directions together with
remote control of the preamps.
Cat5 cable –Use STP (shielded twisted pair) Cat5e or
higher cables. Those with both foil and braided
screens provide shielding from interference and are
generally more rugged. Stranded core cables are less
prone to damage when kinked or repeatedly coiled.
Remote Inputs - dSNAKE inputs are mapped one-to-
one to the Qu input channels. They are not patchable.
Note - dSNAKE does not add channels to the mixer.
Choose either Local (rear panel) or dSNK (remote)
input for each channel.
Remote Outputs -Qu outputs can be patched to the
output sockets on the remote racks. These duplicate
the outputs on the Qu rear panel.
Connecting Qu to the AudioRack –Plug one end of
your Cat5 ‘digital snake’ into the Qu mixer dSNAKE port. Plug the
other end into the dSNAKE port of the AudioRack.
Connecting a second AudioRack –The AR2412 and
AB168 AudioRacks include an EXPANDER port. You can use this
to connect to an AR84 or AB168 AudioRack.
Note –The AR2412 AudioRack cannot be used as an expander in
a Qu system.
Note –You can connect up to two AudioRacks in a Qu system.
This includes the main rack and one expander rack.
Once connected and powered up, the Qu touch screen should
display the ‘dS’ icon in its toolbar to show that one or more
dSNAKE devices are recognised by the system.
dSNAKE carries:
Up to 38 remote input signals
Up to 16 remote output signals
40 personal mixing sends
Preamp control –Gain, Pad, 48V
The Qu mixer provides a locking Neutrik
EtherCon socket to protect the
connections and ensure suitability for
touring. Use a touring grade cable fitted
with locking EtherCon plugs.
Maximum cable length = 120m (396’)
depending on cable type. Recommended
maximum length = 100m (330’).

Qu Mixer Reference Guide 16 AP9372 iss.7
Available AudioRacks:
AB168 16 Mic/Line in, 8 Line out -Floor, shelf or rack mount
The AB168 AudioRack can be used as a stage box on the floor or a surface, or mounted in a 19” rack
using the optional rack ears.
AR2412 24 Mic/Line in, 12 Line out -Rack mount
AR84 8 Mic/Line in, 4 Line out -Rack mount
Inputs –Use the Preamp screen Fn key Source page
to choose either the local (rear panel) socket or a
remote (dSNAKE) socket for each channel source.
Red buttons show local sources selected, yellow
buttons show dSNAKE sources.
dSNAKE inputs can be patched to channels using the
Setup / I/O Patch / dSNAKE In screen. This means
that any AudioRack input can be patched to any
channel. Sockets can be patched to more than one
channel. The reset default is one-to-one mapping of
sockets to channels.
Note –Adding an AudioRack does not expand the
number of Qu channels available.
Outputs –The Qu mixer outputs will appear
simultaneously at its rear panel sockets and also at the
sockets on the remote rack. AudioRack output sockets
are patchable. Qu outputs can be patched to the rack
sockets using the Setup / I/O Patch / dSNAKE Out
screen.
EXPANDER –To connect to a
second AB168 to add more
input and output sockets. Also
compatible with the Allen &
Heath ME personal mixing
system.
dSNAKE –To connect to the Qu
mixer using a Cat5 digital snake.
EXPANDER –To connect to an
AR84 or AB168 to add more
input and output sockets.
MONITOR –To connect to the
Allen & Heath ME personal
mixing system.
dSNAKE –To connect to the
Qu mixer using a Cat5 digital
snake.
EXPANDER –To connect to
the Expander port of the
AR2412, or connect directly to
the Qu mixer via its dSNAKE
port.

Qu Mixer Reference Guide 17 AP9372 iss.7
5.2 Qu Systems
The Qu mixer has sockets for all its inputs and outputs on its rear panel and can therefore be used
without any additional rack. However, if you wish to use a digital snake to connect remote stage audio to
the mixer using a single Cat5 cable then there are several rack options available. The following diagrams
show suggested combinations:
Qu-24 Qu-24
AR84
CH1-8 Out1-4
AR2412
CH1-24 Out1-12
Qu-24
Qu-24
AR2412
CH1-24 Out1-12 Out9-16
EXPANDER
1-8 = CH17-24
Qu-24
dSNAKE
AB168
CH1-16 Out1-8
dSNAKE dSNAKE
dSNAKE
EXPANDER
AR84
Out13-16
7-8 = unused
1-6 = ST1-3
Qu-24
dSNAKE
AB168
CH1-16 Out1-8 15-16 = unused
9-14 = ST1-3
Qu-24 –All inputs and outputs
are available locally.
Qu-24+AR84 –8 remote inputs.
Provides 4 outputs
Qu-24+AR2412 –Access all 24
mic inputs near the stage.
Qu-24+AR2412+AR84 –Adds
the ST1-3 stereo mic inputs near
the stage.
Qu-24+AB168 –Digital snake
for 16 mic inputs on stage.
Qu-24+2x AB168 –Expands
with a second stage box to
access all inputs.
AR84
CH1-8 Out1-4
Qu-16
dSNAKE
CH1-16 Out1-8
Qu-16
Qu-16
dSNAKE
CH1-16 Out1-8 Out9-16
Qu-16
dSNAKE
AR2412
EXPANDER
AB168
23-24 = unused
17-22 = ST1-3
1-16 = CH1-16
7-16 = unused
1-6 = ST1-3
Qu-16
dSNAKE
AB168
Out1-12
Qu-16 –All inputs and outputs
are available locally. Use on
stage or with an analogue
snake.
Qu-16+AR84 –8 remote inputs.
Provides 4 outputs, ideal for
feeding a stereo PA and two
monitors.
Qu-16+AR2412 –Access all
inputs and outputs near the
stage. ST1-3 provide stereo mic
inputs.
Qu-16+AB168 –Provides a
rugged digital snake and stage
box for all 16 mic inputs and up
to 8 returns.
Qu-16+2x AB168 –A second
stage box expands the first to
access ST1-3 on its first 6 inputs
and provides more outputs.
Inputs 7-16 are not used.

Qu Mixer Reference Guide 18 AP9372 iss.7
PSU
PoE
PSU
PSU
ME-U hub
ME-1
ME-1
ME-D
EXPANDEREXPANDER
AR2412
MONITOR
dSNAKE
AB168
EXPANDER
AB168
dSNAKE
Qu Mixer
ME System ME System ME System ME System
Qu Mixer Qu Mixer Qu Mixer
dSNAKE dSNAKE
ME Personal Mixing System –The Qu system can interface directly or via the ME-U hub to ME-1 personal
mixers using any available dSNAKE, EXPANDER or MONITOR port.
Parallel connection
Use the ME-U hub or a
standard PoE hub to
power and connect to
several ME-1 mixers
using individual Cat5
cables.
Daisy chain connection
Connect to Link In of the
first ME-1 mixer. Connect
its Link Out to daisy chain
to the next. Use the power
units provided with each
ME-1 mixer.
AR84
CH1-8 Out1-4
AR2412
CH1-24 Out1-12
dSNAKE dSNAKE
Qu-32 Qu-32
AR2412
CH1-24 Out1-12
dSNAKE
15-16 = unused
9-14 = ST1-3
Out9-16
EXPANDER
1-8 = CH25-32
Out9-16
EXPANDER
Qu-32 Qu-32 Qu-32
Qu-32 Qu-32
AR84
Out13-16CH25-32
dSNAKE
AB168
CH1-16 Out1-8
dSNAKE
AB168
CH1-16 Out1-8 CH17-32
AR2412
CH1-24 Out1-12
dSNAKE
EXPANDER
Qu-32 –All inputs and outputs
are available locally.
Qu-32+AR84 –8 remote inputs.
Provides 4 outputs
Qu-32+AR2412 –Access to 24
mic inputs near the stage.
Qu-32+AB168 –Digital snake
for 16 mics on stage.
Qu-32+2x AB168 –Add a
second AB168 for 32 mics on
stage.
Qu-32+AR2412+AR84 –
Provides all 32 mic inputs near
the stage.
Qu-32+AR2412+AB168 –
Access to all inputs including
stereos.
Qu-Pac –Same engine as
Qu-32 but has 16 inputs and
same outputs as Qu-16 available
locally. Use dSNAKE to access
the others.

Qu Mixer Reference Guide 19 AP9372 iss.7
5.3 The ME Personal Mixing System
The Allen & Heath ME Personal Mixing System can be used with the Qu mixer. This provides
customisable personal monitor control for individual musicians and performers on stage.
ME-1 personal mixer –A compact personal mixer
able to work with up to 40 channels. Features built-in
headphones and monitor output. Intuitive and easy to
operate, its 16 select keys can be configured to
provide as much or as little control as the musician
needs.
The 40 ME channels are mapped from the Qu input
channel direct outputs, FX and mixes to dSNAKE. Qu
sends audio and stereo status information. Channels
can be chosen and grouped to ME-1 keys using the
setup function available on the ME-1 mixer.
Multiple ME-1 mixers can be connected in series
(daisy chained) by linking the output of one to the
input of the next. Alternatively, they can be connected
in parallel and powered over their Cat5 cables using a
standard PoE Ethernet switch or the Allen & Heath
ME-U hub. The ME connects directly to a dSNAKE
compatible port using a Cat5 cable.
Connecting ME to the AR2412 AudioRack -ME-1 mixers, a standard Ethernet switch or the ME-U hub
can be plugged into either or both the AR2412 MONITOR and EXPANDER ports.
Connecting ME to the Qu mixer - ME-1 mixers, a standard Ethernet switch or the ME-U hub can be
plugged directly into the Qu dSNAKE port if you are not using this to connect to an AudioRack. Power can
be provided over the Cat5 by the ME-U or a PoE switch.
Find out more about the ME Personal Mixing System at www.allen-heath.com
Power unit
EXPANDER port
MONITOR port
Daisy chain
dSNAKE
dSNAKE
Daisy chain other ME-1

Qu Mixer Reference Guide 20 AP9372 iss.7
6. Qu-16, 24, 32 Operational Overview
This section provides an overview of the Qu fader mixer layout and operation to help you get started
quickly. The Qu-16 mixer is shown here. Similar applies to the Qu-24 and Qu-32.
6.1 Fader Strips
The Qu mixer has a group of fader strips, one per channel. These
provide access to the input and master channel levels and
processing.
The main channel levels, master levels and all sends to the FX
and mixes can be easily viewed and adjusted using the faders.
The faders can also be used to adjust the Graphic EQ while in
Fader Flip mode.
The faders are motorised and instantly move to show the current
settings when the layer or function is changed.
Layers –There are three Layers. These provide access to inputs and masters as identified by the labels
alongside the layer select keys. Indicators next to the keys show which layer is active.
Press the lower key to access the mono channels.
Press the upper key to access the 3 stereo channels, FX returns, FX sends and Mix masters.
Press both keys together to access the user assignable Custom layer.
Note –There is an option in the Setup / Control / Custom Layer screen to enable ‘Custom Layer only’.
This lets you choose which channels the user should have access to.
Fader Flip
TouchChannel
Screen select
SuperStrip
Fader Strips
Touch Screen
Master Strip
Mix assign
SoftKeys
Layer select
Copy/Paste/reset
Mix select Mix keys
Channel select Sel key
Engineer’s monitor
Qu-Drive
Function key ( Fn )