Take your mix anywhere and everywhere with the Qu-SB Compact Digital Mixer from Allen & Heath. This ultra-compact mixer delivers smart, powerful, and portable solutions to performing bands and artists on the go. Small enough to carry under one arm or easily slip into a backpack or gig bag, the Qu-SB is packed with premium FX emulations and dynamics, making it a streamlined replacement for an analog mixer and rack-full of outboard FX.

The Qu-SB gives you all the connectivity you need to personalize your setup and optimize your sound. It comes with 18 onboard inputs and 14 outputs for connecting other audio gear. This mixer is also easily scalable, offering plug-and-play expansion options for up to 38 inputs and 24 outputs using remote AudioRacks (sold separately).

Be ready to play whenever the mood strikes with the Qu-SB mixer’s preset options. A companion Qu-Pad app lets you set up the show and mix live from the comfort of your iPad. A customizable Qu-Control app lets you pre-set the essential controls so you can effortlessly access them mid-performance. The Qu-You personal monitoring app (for Android/iOS) gives you lots of options for mixing your monitors, delivering consistent sound wherever you play. Allen & Heath’s Qu series features multitrack recording direct to USB, Automatic Mic Mixing, ProFactory mic presets, plus an ever-growing ecosystem of apps, accessories, remote I/O, and so much more.

Beyond the mixers themselves, Qu is a comprehensive setup with features that include:

Remote AudioRacks allowing I/O to be placed where it's needed
ME Personal Mixers expanding monitor mixes and enabling time-saving local control
Qu Apps for complete remote setup and wireless mixing on stage or anywhere else in the venue
ProFactory Mic presets to speed up preparation time and ensure the best sound
USB recording and DAW integration for powerful workflow optimization from a central device

Allen & Heath Qu-SB Features

19” Rack-mountable Digital Mixer for Live, Studio and Installation, with optional rack ears
Expandable up to 32 input, 24 out using dSNAKE AudioRack
Up to 11 Monitor Mixes (4 mono + 7 stereo)
Compatible with ME Personal Mixing System
4 FX Engines
32—32 USB Audio Interface
Qu-Drive for stereo and 18-track recording/playback to USB devices
Qu-Pad engineer’s mixing wireless remote app for iPad
Qu-You iPhone / Android personal monitoring app
Qu-Control customizable iOS app for simple wireless control
Automatic Mic Mixer
Channel Ducker on all Inputs
ProFactory Mic Presets
RackFX Library
Built-in Signal Generator
RTA with Peak Band indication
DAW MIDI Control
AnaLOGIQ™ total recall analogue preamps
4 stereo FX with dedicated Sends and Returns
dSNAKE over Cat5 for remote audio
Compatible with Allen & Heath ME personal mixing system
Effects ported from the flagship iLive console
Automatic Mic Mixing
User Permissions to restrict operator access
Master strip for quick access to mix levels and processing
Input channel linking for stereo sources
31 Band Real Time Analysis
Quick copy and reset of processing, mixes, and scenes
Channel Safes, Global and per Scene Recall Filters
FX, processing, and channel User Libraries
100 Scene memories
USB transfer of Scenes, Libraries, Shows
USB streaming to/from an Apple® Mac or Windows™ PC computer
MIDI DAW Control driver for Mac (converts to HUI or Mackie Control)
Optimized fan-less airflow design for silent operation

Qu-SB Compact Digital Mixer1
One Year Limited Warranty1

Inputs
- Mic/Line Inputs
- Stereo Line Inputs
Outputs
- Mix1-10 and LR Out: Balanced, XLR
- Group and Matrix Out (not Qu-16): (1/4" TRS Matrix Out on Qu-SB)
- Output Impedance: <75Ω
- Nominal Output: +4dBu = 0dB meter reading
- Maximum Output Level: +22dBu
- Residual Output Noise: -90 dBu (muted, 20-20kHz)
- Stereo Alt Out & 2Trk Out (not Qu-SB): Balanced, 1/4" TRS jack
- Source (Alt Output / 2Trk Output): Patchable / LR post-fade
- Output Impedance: <75Ω
- Nominal Output: +4dBu = 0dB meter reading
- Maximum Output Level: +22dBu
- Residual Output Noise: -90 dBu (muted, 20-20kHz)
- AES Digital Output (not Qu-SB)
dSNAKE
- Inputs: Remote source for CH1-32, ST1, ST2, ST3
- Outputs
System
- Dynamic Range: 112dB
- Frequency Response: +0/-0.5dB 20Hz to 20kHz
- Headroom: +18dB
- Internal operating Level: 0dBu
- dBFS Alignment: +18dBu = 0dBFS (+22dBu at XLR output)
- Meter Calibration: 0dB meter = -18dBFS (+4dBu at XLR out)
- Meter Peak indication: -3dBFS (+19dBu at XLR out), multi-point sensing
- Meter Signal indication: -48dBFS (-26dBu at XLR out)
- Meter Type: Fast (peak) response
- Sampling Rate: 48kHz +/-100PPM
- ADC, DAC: 24-bit Delta-Sigma
- Latency
- Operating Temperature Range: 0 deg C to 35 deg C (32 deg F to 95 deg F)
- Mains Power: 100-240V AC, 50/60Hz
- Maximum Power Consumption Qu-16/24/32/Pac/SB: 82W/120W/150W/55W/49W
USB Audio
- Qu-Drive: USB A
- Stereo Record: 2 channel, WAV, 48kHz, 24-bit, patchable
- Stereo Playback: 2 channel, WAV, 44.1 or 48kHz, 16 or 24-bit, to ST3
- Multitrack Record: 18 channel, WAV, 48kHz, 24-bit, patchable
- Multitrack Playback: 18 channel, WAV, 48kHz, 24-bit
- USB Audio Streaming: USB B, Core Audio compliant
- Send (upstream) Qu-16/24/32/Pac/SB: 24/32/32/32/32 channel, WAV, 48kHz, 24-bit
- Return (downstream) Qu-16/24/32/Pac/SB: 22/30/32/32/32 channel, WAV, 48kHz, 24-bit
Control
- Faders Qu-16, 24, 32: 100mm motorised
- Touch Screen Qu16, 24, Pac: 5" TFT, 800x480 resolution
- Touch Screen Qu-32: 7" TFT, 800x480 resolution
- Soft Keys: 4(Qu-16), 10 (Qu-24, 32), 15 (Qu-Pac)
- Mute Groups / DCA Groups: 4/4
- Network: TCP/IP Ethernet for MIDI and iOS apps
Input Processing
- Source
- Stereo Linking: Odd/even input pairs
- Polarity: Normal/Reverse
- High Pass Filter: 12dB/octave 20Hz – 2kHz
- Insert: Assign FX1-4 into Input channels
- Delay: Up to 85ms
- Gate: Self-key Sidechain
- Threshold / Depth: -72dBu to +18dBu / 0 to 60dB
- Attack / Hold / Release: 50us to 300ms / 10ms to 5s / 10ms to 1s
- PEQ: 4-Band fully parametric, 20-20kHz, +/- 15dB
- Band 1: Selectable LF Shelving (Baxandall), Bell
- Band 2, Band 3: Bell
- Band 4: Selectable HF Shelving (Baxandall), Bel
- Bell Width: Non-constant Q, variable, 1.5 to 1/9th octave
- Compressor: Self-key Sidechain
- Threshold / Ratio: -46dBu to 18dBu / 1:1 to infinity
- Attack / Release: 300us – 300ms / 100ms - 2s
- Knee: Soft/Hard
- Types: Peak Manual, RMS Manual, SlowOpto, PunchBag
Mix Processing
- Channel Direct Out to USB: Follow Fader, follow Mute (global options)
- Source select (global): Post-Preamp, Pre-EQ, Post-EQ, PostDelay
- Insert: Assign FX into Mix channels
- Delay: Up to 170ms
- GEQ: Constant 1/3 oct, 28 bands 31Hz-16kHz, +/-12dB Gain
- PEQ: 4-Band fully parametric, 20-20kHz, +/- 15dB
- Band 1: Selectable LF Shelving (Baxandall), Bell
- Band 2, Band 3: Bell
- Band 4: Selectable HF Shelving (Baxandall), Bel
- Bell Width: Non-constant Q, variable, 1.5 to 1/9th octave
- Compressor: Self-key Sidechain
- Threshold / Ratio: -46dBu to 18dBu / 1:1 to infinity
- Attack / Release: 300us – 300ms / 100ms - 2s
- Knee: Soft/Hard
- Types: Peak Manual, RMS Manual, SlowOpto, PunchBag
Internal FX4x RackFX engine, Send>Return or Inserted
Audio Tools
- Types: Reverbs, Delays, Gated Reverb, ADT, Chorus, Symphonic Chorus, Phaser, Flanger
- 4 dedicated Stereo FX returns: Fader, Pan, Mute, Routing to Mix/LR, 4- Band PEQ
PAFLPFL or stereo in-place AFL, 0 to -24dB Trim, 85ms Delay
TalkbackAssignable to any mix, 12dB/oct HPF
Signal GeneratorAssignable to any mix, Sine / White/Pink/Band-pass Noise
RTA31-Bands 1/3 octave 20-20kHz, follows PAFL source

About Digital Mixers at Sound Productions

Digital mixers connect to digital devices, and typically offer a host of personalization features and premium functionalities not available with the more straightforward analog mixer. These features may include onboard sound effects, enhanced signal processing, multi-track recording, customizable settings, and much more! Additionally, digital mixers are compact and portable, and some models even offer wireless connectivity, making them a great option for mobile audio setups where you want to avoid cable clutter.