ALLEN & HEATH Qu-16 User manual

Check www.allen-heath.com for the latest firmware available
Publication AP9372 issue 1
Check www.allen-heath.com for the latest firmware available
Publication AP9372

Qu Mixer User Guide 2 AP9372 iss.1
Qu Series products complies with the European Electromagnetic
Compatibility directives 2004/108/EC and the European Low
Voltage directives 2006/95/EC.
Any changes or modifications to the equipment not approved by Allen &
Heath could void the compliance of the product and therefore the users
authority to operate it.
Qu Mixer User Guide AP9372 Issue 1
Copyright © 2014 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
This product is warranted to be free from defects in materials or workmanship for period of
one year from the date of purchase by the original owner.
To ensure a high level of performance and reliability for which this equipment has been
designed and manufactured, read this User Guide before operating.
In the event of a failure, notify and return the defective unit to the place of purchase. If this
is not possible then please contact the authorised ALLEN & HEATH distributor or agent in
your country as soon as possible for repair under warranty subject to the following
conditions:
Conditions Of Warranty
The equipment has been installed and operated in accordance with the instructions in this
User Guide.
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.
This warranty does not cover fader wear and tear.
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 to avoid transit damage.
In certain territories the terms may vary. Check with your ALLEN & HEATH distributor or
agent for any additional warranty which may apply.
If further assistance is required please contact Allen & Heath Ltd.
ALLEN&HEATH

Qu Mixer User Guide 3 AP9372 iss.1
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 in the product's pages. 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 User Guide 4 AP9372 iss.1
1. Packed contents
Options and Accessories available
Qu Mixer
Safety Sheets
AP3345 – English
AP7287 – French
AP8513 – Chinese
•Read this before starting
Mains lead •Check this
is correct for your territory
User Guide
A
P9372
REGISTER YOUR PRODUCT
Register online at:
http://www.allen-heath.com
Qu-Pad app for iPad
Available from the Apple Store
Soft cover
AP9262 Qu-16
AP9458 Qu-24
Qu
LEDlamp
Right angled 4-pin XLR
LED lamp with built-in
dimmer
Part: LEDlampX
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
Cat5 cables
For use with dSNAKE remote
audio
AH8822 2m (6.6’) short patch
AH7000 80m (264’) drum
AH8721 120m (396’) drum
Remote AudioRacks
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

Qu Mixer User Guide 5 AP9372 iss.1
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-16 and Qu-24...............................................................................9
4.Connection Overview........................................................................................................................10
4.1Local Input Connections..........................................................................................................10
4.2Local Output Connections.......................................................................................................11
4.3Other Connections...................................................................................................................11
4.4Powering up the mixer.............................................................................................................12
5.Connecting dSNAKE Remote Audio ................................................................................................13
5.1Connecting to a remote AudioRack ........................................................................................13
5.2Qu-16 and Qu-24 Systems ......................................................................................................14
5.3Connecting to the ME Personal Mixing System......................................................................15
6.Operational Overview .......................................................................................................................16
6.1Fader Strips..............................................................................................................................16
6.2Channel Processing.................................................................................................................18
6.3Working with the Processing: ..................................................................................................18
6.4Working with Processing Libraries: .........................................................................................18
6.5Processing Libraries ................................................................................................................23
6.6Channel Routing ......................................................................................................................24
6.7Working with the Routing screens:..........................................................................................24
6.8Working with the Groups (not Qu-16) .....................................................................................25
6.9Working with the Matrix (not Qu-16)........................................................................................26
6.10Mute Groups ............................................................................................................................27
6.11Using the Mute Groups............................................................................................................27
6.12The Master Strip.......................................................................................................................28
6.13Working with the sends on faders: ..........................................................................................29
7.Touch Screen Mixing Functions.......................................................................................................30
7.1Copy, Paste, Reset keys..........................................................................................................31
7.2The Sel screens – Processing and Routing ............................................................................32
7.3Home Screen ...........................................................................................................................32
7.4Home Screen – Changing User...............................................................................................32
7.5Home Screen – Meters ............................................................................................................33
7.6Home Screen – RTA ................................................................................................................33
7.7Home Screen – Qu-Drive (USB audio)....................................................................................33
7.8The FX ......................................................................................................................................36
7.9Working with FX – Adding vocal reverb: .................................................................................38
7.10Scene Memories ......................................................................................................................39
8.Touch Screen Setup Functions ........................................................................................................41
8.1Audio Setup -PAFL...................................................................................................................41
8.2Audio Setup - Talkback ...........................................................................................................41
8.3Audio Setup –Signal Generator...............................................................................................42
8.4Control Setup – Custom Strip..................................................................................................42
8.5Control Setup - SoftKeys .........................................................................................................43
8.6Control Setup - Network ..........................................................................................................44

Qu Mixer User Guide 6 AP9372 iss.1
8.7Control Setup - MIDI ................................................................................................................44
8.8USB Data – Scene Transfer .....................................................................................................45
8.9USB Data – Library transfer .....................................................................................................45
8.10USB Data – Show transfer .......................................................................................................46
8.11Output Patch Setup – Surface .................................................................................................47
8.12Output Patch Setup – dSNAKE ...............................................................................................47
8.13Output Patch Setup - Monitor..................................................................................................48
8.14Output Patch Setup – USB Audio............................................................................................49
8.15Utility - Calibration....................................................................................................................49
8.16Utility – Qu-Drive ......................................................................................................................50
8.17Utility – Firmware Update.........................................................................................................51
9.Working with a DAW .........................................................................................................................52
10.Qu-Pad iPad app ..............................................................................................................................53
11.Resetting the Mixer ...........................................................................................................................54
11.1Reset Mix Settings – A starting point for mixing......................................................................54
11.2System Hard Reset ..................................................................................................................55
12.Specifications....................................................................................................................................56
12.1Qu-16 System Block Diagram .................................................................................................57
12.2Qu-24 System Block Diagram .................................................................................................58
12.3Mechanical Details...................................................................................................................59
About this guide
This is the User Guide for the Allen & Heath Qu-16 and Qu-24 digital
mixers.
Please Note
This guide refers to Qu firmware V1.3. A few features are not
supported by this release. Please refer to the Allen & Heath website for
the latest version of firmware and this user guide. For more details read
the Release Notes available with the firmware.
Features not supported by this version:
FX User Libraries
Per Scene Recall Filters
User Permissions
Note – USB streaming and DAW MIDI control is compatible with
Apple®Mac computers only. Windows®PC is not supported.

Qu Mixer User Guide 7 AP9372 iss.1
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 two models in the Qu Digital Audio Mixer Series:
Qu-16 – Compact, rack mountable mixer with 16 mic and 3 stereo line channels.
Qu-24 – Larger mixer with 8 more mic channels, 2 more FX sends, 6 more
assignable SoftKeys, and adding 2 stereo groups and 2 stereo matrix.
Qu-16 Qu-24
16 mono Mic/Line channels 24 mono Mic/Line channels
3 stereo Line channels 3 stereo Line channels
24 sources to the mix 32 sources to the mix
12 mixes (4 mono, 3 stereo, LR) 12 mixes (4 mono, 3 stereo, LR)
4 FX with 2 FX send buses 4 FX with 4 FX send buses
4 assignable SoftKeys 10 assignable SoftKeys
4 Mute Groups 4 Mute Groups
24 out, 22 in USB streaming 32 out, 30 in USB streaming
2 stereo Groups
2 stereo Matrix
Qu-16 and Qu-24
Extra stereo outputs – AES digital, Alt Out, 2TRK out
Talkback mic input
dSNAKE for remote audio using an AR2412 or AR84 AudioRack
AnaLOGIQ™ total recall analogue preamps
Effects ported from the flagship iLive console
Dedicated stereo FX return channels
Master strip for quick access to mix levels and processing
Input channel linking for stereo sources
Input processing – Preamp, HPF, 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 settings and scenes
100 Scene memories
Scene Recall Filter and channel Safes
Channel processing User Libraries
Qu-Drive for stereo and 18-track recording/playback to USB hard drive
USB streaming to/from an Apple®Mac computer (PC not supported)
MIDI DAW Control driver for Mac (converts to HUI or Mackie Control)
USB transfer of Scenes, Libraries, Shows
User assignable Custom Layer
Qu-Pad wireless remote app for iPad
Compatible with the Allen & Heath ME personal mixing system
User Permissions to restrict operator access (Not available in V1.3)

Qu Mixer User Guide 8 AP9372 iss.1
3.2 System Architecture and Processing
The following diagrams show the Qu-16 and Qu-24 I/O (inputs and outputs), audio architecture
and processing available. The differences 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.
LR post
LR post
Mic
Line
L/M
R
Mic/Line Inputs
ST1
L/M
R
ST2
ST3
L/R
Mic
Talkback
Line Inputs
1 ---------- 24 Qu-Drive
USB B
Stream Stream
30 ch 32 ch
Playback
LR, 18 trk
SYSTEM DIAGRAMQu-24
Local Inputs dSNAKE USB
Record
LR, 18 trk
PREAMP
GAIN
48V
POL
0
TRIM HPF GATE PEQ COMP DELAY
FX
Insert MUTE
LR
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
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
LR
PAN
PEQ COMP DELAY
FX
Insert MUTE FADER
Matrix 1-2, 3-4
GEQ
Outputs
Output PATCHMixInputs Masters
Line Outputs
Grp 1---4
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
LR
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
SYSTEM DIAGRAMQu-16
Local Inputs dSNAKE USB
Record
LR, 18 trk
PREAMP
GAIN
48V
POL
0
TRIM HPF GATE PEQ COMP DELAY
FX
Insert MUTE
LR
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
LR
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:
LR
Output BAL
ASSIGN
PRE/POST
SENDS
Outputs
PAFL Route to:
LR
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
LR
Output BAL
ASSIGN
PRE/POST
SENDS
LR
Output BAL
Outputs
PAFL Route to:
LR
Output BAL
Outputs
PAFL Route to:
LR
Output BAL

Qu Mixer User Guide 9 AP9372 iss.1
3.3 Differences between the Qu-16 and Qu-24
Both models operate in the same way and have a similar touch screen menu structure. The larger
model adds Groups and Matrix. Other differences are shown here:
Scene, Library and Show memories - Qu-16 and Qu-24 memories are
compatible. Files created on one model can be transferred via USB key and
loaded on the other. The extra features of the Qu-24 will be ignored when a
Qu-24 file is loaded on a Qu-16. The extra features of the Qu-24 will be reset
to factory default when a Qu-16 file is loaded on a Qu-24.
Note To be compatible, ensure all your Qu mixers including Qu-16 and Qu-
24 are loaded with the same version of firmware V1.3 or later. Check the
Allen & Heath web site for the latest firmware.
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 24 out / 22 in, and
the Qu-24 is 32 out / 30 in.
Firmware - Different firmware is needed for each model. Choose either the
Qu-16 or Qu-24 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 both
models.
Shelf for iPad 10 SoftKeysGroup masters Matrix masters
Extra FX Send and Group Mix select24 fader strips
4 SoftKeys
16 fader strips
LED colour strips to identify layer
Group out Matrix out
24 Mic/Line in16 Mic/Line in
32 out, 30 in USB audio streaming
24 out, 22 in USB audio streaming

Qu Mixer User Guide 10 AP9372 iss.1
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 switching 48V on or off.
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 outLamp
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 User Guide 11 AP9372 iss.1
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 output – 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 / Audio / Output Patch 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 / Audio / Output
Patch 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.
Qu supports DAW connection to an Apple Mac only.
Windows PC drivers are currently not available.
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. The Lnk indicator flashes to indicate
network activity.
dSNAKE – The proprietary Allen & Heath ‘digital snake’
connection for remote audio using an AR2412 or AR84
AudioRack, and for personal monitoring using the ME
Personal Mixing System.
Pin2 = hot

Qu Mixer User Guide 12 AP9372 iss.1
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. CH1 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 User Guide 13 AP9372 iss.1
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 GLD-AR2412 or GLD-AR84 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.
Maximum cable length = 120m (396’)
Remote Inputs - dSNAKE inputs are mapped one-to-
one to the Qu input channels.
Note - dSNAKE does not add channels to the mixer.
Choose either Local (rear panel) or dSNK (remote)
input for each channel.
Remote Outputs - Qu mix and LR outputs are
mapped to the output sockets on the AR rack. These
duplicate the outputs on the Qu-16 rear panel.
The following remote AudioRacks are available:
AR84 main rack CH 1-8 Mix 1-2, LR dSNAKE link
AR2412 main rack CH1-16, ST1-3 Mix 1-10, LR
dSNAKE carries:
Up to 30 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.
ME-1
Monitor
A
R84 expander or ME-1

Qu Mixer User Guide 14 AP9372 iss.1
5.2 Qu-16 and Qu-24 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.
Inputs – Use the Preamp screen to choose either
‘Local’ or ‘dSNK’ (remote) for each channel source.
Adding a rack does not expand the number of Qu
channels available.
Outputs – The Qu outputs will appear simultaneously
at its rear panel sockets and also at the sockets on the
remote rack. The mixes mapped to the rack sockets
are shown in the diagrams here.
Qu-16 + AR84 AudioRack
Remote Mic/Line inputs are available for CH1 to 8.
Mix1, 2 and the main LR mix are available from rack
sockets 1-4.
This compact setup is ideal for a band, corporate
event or small club using a stereo PA and two monitor
mixes.
Qu-16 + AR2412 AudioRack
Remote Mic/Line inputs are available for all channels
including mono CH1-16 and stereo ST1-3. Left and
right of the stereo channels use rack sockets 17-22.
Rack sockets 23-24 are not used.
The EXPANDER socket is not used for audio I/O, but
can also be used to connect to a ME monitor system.
All Qu-16 mixes including Mix1-10 and LR are available
from rack sockets 1-12 (L=11, R=12).
Qu-24 + AR84 AudioRack
Remote Mic/Line inputs are available for CH1 to 8.
Mix1, 2 and the main LR mix are available from rack
sockets 1-4.
This setup is ideal for a band, corporate event or small
club where you are using just a few remote inputs and
a stereo PA with two monitor mixes.
Qu-24 + AR2412 AudioRack
Remote Mic/Line inputs are available for all mono
channels CH1-24.
Mix1-10 and LR are available from rack sockets 1-12
(L=11, R=12).
Qu-24 + AR2412 + AR84 AudioRacks
Remote Mic/Line inputs are available on the AR2412
for all mono channels CH1-24. ST1-3 inputs are
available on an AR84 plugged into the AR2412
EXPANDER port.
Mix1-10 and LR are available from AR2412 rack
sockets 1-12 (L=11, R=12). MTX1-2 and 3-4 outputs
are available on an AR84 plugged into the AR2412
EXPANDER port.
A
R2412
A
R84
A
R2412
A
R84
A
R84
A
R2412
CH1-8 Mix1-2, LR
CH1-16, ST1-3 Mix1-10, LR
CH1-8 Mix1-2, LR
Qu-16
Qu-16
Qu-24
Qu-24
Qu-24
CH1-24 Mix1-10, LR
CH1-24 Mix1-10, LR
ST1-3 MTX1-4
dSNAKE
dSNAKE
dSNAKE
dSNAKE
dSNAKE
EXPANDER

Qu Mixer User Guide 15 AP9372 iss.1
5.3 Connecting to 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.
These 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 User Guide 16 AP9372 iss.1
6. Operational Overview
This section provides an overview of the Qu layout and operation to help you get started quickly. The
smaller Qu-16 is shown here.
6.1 Fader Strips
The Qu 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.
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

Qu Mixer User Guide 17 AP9372 iss.1
Mute key – Press to turn off the channel audio signal. This affects the send to
all mixes including LR, groups, effects and stage monitors. The Mute key lights red
when the channel is muted. It flashes when it is muted by a Mute Group master.
Sel key (select) – Press to access the Channel Processing. Parameters can
be adjusted using the SuperStrip controls. The touch screen will display the
settings and provide additional controls if either the Processing or Routing screen
is active. The Sel key is also used for:
Assign mix routing – Hold down the ‘Assign’ key and press Sel keys to
assign channels to the mix currently selected in the Master Strip. The Sel
keys light green to show channels assigned to the selected mix.
Assign Pre/Post fade sends – Hold down the ‘Pre Fade’ key and press Sel
keys to toggle channel sends pre or post fader for the mix currently selected
in the Master Strip. The Sel keys light green to show channels set pre-fade.
Copy channel processing – Hold down the Copy key and press a channel
Sel key to copy its processing settings. Then hold down the Paste key and
press one or more Sel keys to instantly paste those settings to other
channels.
Reset channel processing – Hold down the Reset key and press a channel
Sel key to instantly reset all its processing to factory default.
Reset Graphic EQ band – Press Sel to reset the associated GEQ frequency
band to 0dB while in GEQ Flip mode.
PAFL key – Press to listen to a channel using headphones and check its level
on the main meters. The meter PAFL indicator lights. Press PAFL again to turn it
off. A SoftKey can be assigned to clear all active PAFL selections.
Options are available in the Setup screen to choose how you want PAFL to work:
Auto-cancel – Listen to one channel at a time.
Additive mode – Listen to more than one channel at a time.
Sel follow PAFL – Link the Sel switch so that pressing PAFL automatically
selects the processing for that channel.
LR to PAFL – Routes the main LR mix to the monitor when there is no PAFL
selected.
Output AFL – This option sets the mix strip PAFL keys to monitor AFL (after-
fade listen). With this option turned off these keys monitor PFL (pre-fade
listen). The default is AFL so that you can check mixes after the master fader.
Input AFL – This option sets the input strip PAFL keys to monitor AFL (after-
fade listen). With this option turned off these keys monitor PFL (pre-fade
listen). PFL is the usual setting for inputs so that you can check and set their
gain before you bring up the faders.
Channel meter – The strip meters let you keep an eye on signal levels while
you are mixing. These display channel level before the fader and mute control:
Pk – Lights red to warn that the signal is too hot and gain or trim should be
reduced. It turns on 3dB before clipping to warn you before audible
distortion. Pk senses the signal at several points within the channel.
0– Lights when the signal reaches nominal 0dBu allowing a healthy 18dB
headroom. This is the normal level for mixing.
Sig – Lights to show signal presence. It turns on at -26dBu.
Fader – Controls the level of the input channel, FX or mix master assigned to it.
This can be the main channel fader or a send to an effect or mix depending on
which Mix Select key is active in the Master Strip.
The faders can control the Graphic EQ frequency bands while in GEQ Flip mode
with a mix master Sel key active. The range of frequencies accessed by the faders
is highlighted in the touch screen and labelled at the top of the faders. The centre
0dB flat position is marked on the fader scale.

Qu Mixer User Guide 18 AP9372 iss.1
6.2 Channel Processing
The SuperStrip provides familiar, analogue feel, one function per knob control of channel and mix
master processing such as equalisers and dynamics. The Touch Screen displays the parameter values
and provides additional related controls while in the Processing screen. This processing is accessed
using the fader strip Sel keys.
The following processing is available:
Mono input CH = Source, Preamp, HPF, Gate, PEQ, Compressor, Delay, Stereo Linking
Stereo input ST1-3 = Source, Preamp, HPF, Gate, PEQ, Compressor, Delay
FX Return 1-4 = FX parameters, PEQ
Grp1-4 (not Qu-16) = Parametric EQ, Graphic EQ, Compressor, Delay
Mix1-10, LR = Parametric EQ, Graphic EQ, Compressor, Delay
MTX1-4 (not Qu-16) = Parametric EQ, Graphic EQ, Compressor, Delay
6.3 Working with the Processing:
Press a fader strip Sel key. The Processing Block
controls become active for that channel.
Press the Processing key to work with the parameters
on the Touch Screen.
Touch the top part of the Touch Screen to open the
tabs for the available processing blocks.
View values in the lower part of the screen. Touch
screen buttons and use the screen rotary to adjust
parameter values.
6.4 Working with Processing Libraries:
Press the ‘Library’ Fn key to open and close the related
Library page.
Use the left hand list for individual processing libraries
or the right hand list for complete input channel
processing libraries including the preamp.
Store - Touch ‘Store New’. Enter a name using the
screen keypad to store a new User Library. You can
store up to 128 Libraries.
Recall - Highlight a library item and touch ‘Recall’ to
instantly recall its settings. Turn on ‘Recall Preamp’ if
you want to recall the preamp settings.
Edit – Highlight a library item and touch ‘Overwrite’ to
overwrite an existing library with the current settings, or
‘Delete’ to delete it from the list. Touch the ‘Name’ box
to edit its name.

Qu Mixer User Guide 19 AP9372 iss.1
Preamp
An analogue preamplifier (‘head amp’) matches each
connected microphone or line signal to the operating
level of the console before it gets converted to digital
to be processed and mixed with the other channels.
Source lets you choose one of four sources as the
input to the channel:
Local – Mic/Line sockets on the Qu rear panel.
dSNK – Remote preamps via dSNAKE.
Qu-Drv – Playback from USB hard drive.
USB B – Audio streaming from a Mac computer.
Press the Fn key to open the Source Select
screen.
Touch the CH buttons to highlight those you
wish to change. Select the source from the list.
Channel Preamp source
Local (red Gain) – Rear panel Mic/Line sockets
feeding the internal Qu mixer preamps. These are pad-
less preamps featuring wide gain range.
dSNAKE (yellow Gain) – Remote preamps located in
an AR2412 or AR84 AudioRack on stage or other
remote location and connected to the Qu dSNAKE
port via a Cat5 cable. The AudioRack preamps include
20dB Pad switching.
Channel USB source
Qu-Drive source (blue Gain) – Stereo or multitrack
playback from a USB hard drive plugged into the top
panel Qu-Drive port. Provides a +/-24dB Trim control.
USB B source (blue Gain) – Multi-channel streaming
from a Mac computer via the rear panel USB B port.
Provides a +/-24dB Trim control.
The panel USB Select key in the SuperStrip switches
between the current Preamp source (Local or
dSNAKE) and the current USB source (Qu-Drive or
USB B).
Phantom Power
Turn on 48V if the connected device requires phantom
power, for example a condenser microphone or active
DI box. Touch and hold for 1 second to toggle on or
off. This prevents accidental operation.
Note - To prevent audible thumps make sure the
channel is muted before switching 48V on or off.
Gain
Choose either Qu-Drive or USB (affects all channels)
Local (red Gain) dSNAKE (yellow Gain)
Qu-Drive (dark blue Gain) USB B (Light blue Gain)

Qu Mixer User Guide 20 AP9372 iss.1
Gain
Turn up Gain so that the average loud signal reads
into the yellow of the meter. Turn down if any red peak
light flashes.
Polarity
Touch Øto reverse the polarity of the input signal, for
example that of the lower mic when working with two
microphones on a snare drum.
Other functions in the Preamp section
Insert switches an internal FX in or out if one has been
patched into the channel. The button is disabled when
the insert is not patched. The FX is inserted between
the preamp and EQ.
Use the FX / Back panel screen to choose and assign
one of the 4 internal FX as an Insert into a channel.
Delay up to 85ms can be added to each input
channel. In most cases delay is not needed, but can
be useful in time aligning sound from the PA to the
acoustic sound from an instrument on stage. Allow
1ms per foot distance as a starting point.
Linking lets you gang the preamp, processing and
routing of an odd/even mono channel pair for stereo
operation. All parameters including the preamp,
processing and routing are linked. Pan becomes a
width control when linked. Some parameters can be
removed from the link using the buttons:
Preamp – Gain/Pad/48V, Polarity
Dynamics (Compressor and Gate) - Side Chains
Main mix – Fader/Mute, Pan
Touch Apply to accept your changes.
Gate
The Noise Gate can be switched in to dynamically turn
off the audio when it drops below a certain level. For
example, to reduce resonant decay of a kick drum or
floor tom, or hiss of a noisy keyboard.
Use the In key to switch the Gate in or out. This is
similar to inserting an outboard rack mounted device
into the Insert socket on an analogue console channel.
Set Depth for how much signal reduction you want
when the gate closes. 20dB is a typical setting. Sound
check the instrument and reduce Threshold to shut off
as much of the tail of the signal as you want. The GR
indicator lights and red screen meter shows the
amount of reduction when the gate is closed.
Hold sets how long the gate remains open after
dropping below the threshold. Attack sets how fast the
gate opens when the signal rises above the threshold.
Release sets how fast it closes when dropping below
the threshold. Experiment with these controls to
achieve smooth operation without a pumping effect.

Peak
Gate active
GR = Gain Reduction
HPF GATE PEQ COMP DELAY
0
Gain/Trim Insert
Post-Preamp Pre-EQ Post-EQ Post-All