Allen & Heath Qu-SB Compact Digital Mixer

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
  • Input Sensitivity (XLR / TRS): -60 to +5dBu / -50 to +15dBu
  • Analogue Gain: -5 to +60dB, 1dB steps
  • Maximum Input: Level (XLR / TRS) +19dBu / +29dBu
  • Input Impedance (XLR / TRS): >5kΩ / >10 kΩ
  • THD+N, Unity gain 0dB: 0.0005% -89 dBu (20-20kHz, Direct Out @0dBu 1kHz)
  • THD+N, Mid gain +30dB: 0.001% -83dBu (20-20kHz, Direct Out @0dBu 1kHz)
  • Stereo Line Inputs
  • ST1, ST2 connector: Balanced, 1/4" TRS jack, half-normalled
  • ST3 connector (not Qu-SB): Unbalanced, stereo 3.5mm Mini Jack
  • Input Sensitivity (ST1, ST2 / ST3): Nominal +4dBu / 0dBu
  • Trim: +/-24dB
  • Maximum Input Level (ST1,ST2 / ST3): +22dBu / +18dBu
  • Input Impedance: >7kΩ
• 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)
  • 2 channel, 48kHz sampling rate, XLR
  • 2.5Vpp balanced terminated 110Ω
• dSNAKE
  • Inputs: Remote source for CH1-32, ST1, ST2, ST3
  • Outputs
  • Patchable from Mix1-10, LR, Grp1-8, MTX1-4
  • Compatible with AudioRacks AR2412, AR84, AB168
  • Compatible with ME personal mixing system
• 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
  • 1.2 ms (local XLR in to XLR out)
  • 0.7 ms (local XLR in to AES out)
  • 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
  • CH1-32: Local, dSNAKE, or USB
  • ST1, ST2: Local, dSNAKE, or USB
  • ST3: Local, dSNAKE, or USB Stereo
  • USB Global Source: Qu-Drive or USB B Streaming
  • Stereo Linking: Odd/even input pairs
  • Parameters linked: EQ, dynamics, insert, delay, assignments, sends
  • Link options: Preamp, polarity, Sidechain, fader/mute, pan
  • 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.