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Allen&Heath QU-SB


Digital I/O Mixer 18/14

  • 18 inputs and 14 outputs, ideal for professional studio recording and live performance.
  • includes 16 AnalogiQ microphone preamps and a 5-core ARM processor for high-quality sound.
  • compatible with ME Personal Mixing System and dSNAKE for expanded connectivity.
  • supports multitrack recording/playback via USB with direct access to Qu-Drive.
  • mobile mixing capabilities through the Qu-Pad app on iPad for flexible operation.
Allen&Heath
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Allen&Heath QU-SB - portable digital mixer with 18 inputs and 14 outputs, rack-mountable, which can be used as a 32x32 USB recording audio interface. It features 16 AnalogiQ microphone preamps, a 5-core ARM processor, and a wide variety of integrated effects and processing, including a 4-band parametric EQ, compressors, delay, and reverb. The mixer is compatible with the ME Personal Mixing System and the dSNAKE digital connection system, offering up to 38 inputs. It is designed to operate with the Qu-Pad app, allowing you to mix from any point in the room when connected to a wireless network using an iPad.

General features:

  • 16 mono inputs (TRS + XLR)
  • 1 stereo input (TRS)
  • 12 outputs (LR, Mono Mix 1-4, Stereo Mix 1-3)
  • 1 Stereo Matrix output (TRS)
  • Built-in Qu-32 Core (32 mono channels + 3 stereo inputs)
  • Up to 11 monitor mixes (4 mono + 7 stereo)
  • 4 FX processors
  • 4 FX send/return channels
  • 4 mute groups
  • 4 DCA groups
  • AnalogiQ microphone preamps
  • iLive FX library
  • Expandable to 38 inputs via dSNAKE Remote Audio Port
  • Automatic mic mixer
  • 32x32 audio interface
  • Direct multitrack recording/playback Qu-Drive to USB
  • Compatibility with ME Personal Mixing System
  • Qu-Pad iPad app
  • Qu-You personal monitoring app for iPhone/Android smartphones
  • All inputs feature trim, polarity, HPF, gate, insert/ducker, 4-band PEQ, compressor, and delay
  • All mix outputs feature insert, 1/3 octave GEQ, 4-band PEQ, compressor, and delay
  • Built-in signal generator
  • RTA indicator with Peak Band
  • 19” rack mountable with additional mounting brackets


Technical specifications:

  • Line/microphone inputs:
    • XLR and 1/4" TRS balanced connectors
    • Input sensitivity: -60 to +5 dBu / -50 to +15 dBu (XLR / TRS)
    • Analog gain: -5 to +60 dB, in 1 dB steps
    • Maximum input level: +19 / +29 dBu
    • Input impedance: >5 kOhms (XLR), >10 kOhms (TRS)
    • THD+N, gain unit 0 dB: 0.0005%, -89 dBu (20 Hz to 20 kHz, direct out at 0 dBu, 1 kHz)
    • THD+N, Mid Gain +30 dB: 0.001%, -83 dBu (20 Hz to 20 kHz, direct out at 0 dBu, 1 kHz)
  • Stereo line inputs:
    • Connector ST1: 1/4" (6.3 mm) TRS balanced jack, normalised to half
    • Input sensitivity (ST1): +4 /0 dBu, nominal
    • Trim: ±24 dB
    • Maximum input level (ST1): +22 /+18 dBu
    • Input impedance: >7 kOhms
  • Line outputs:
    • Mix 1 to 10 & LR Out: balanced XLR
    • Output impedance:
    • Nominal output: +4 dBu = 0 dB meter reading
    • Maximum output level: +22 dBu
    • Residual output noise: -90 dBu (in mute mode, 20 Hz to 20 kHz)
  • Stereo outputs:
    • MTX 1-2: 1/4" (6.3 mm) TRS balanced jack
    • Source (Alt output / 2 Trk output): Patchable/LR post fade
    • Output impedance:
    • Nominal output: +4 dBu = 0 dB indicated on meter
    • Maximum output signal: +22 dBu
    • Residual output noise: -90 dBu (in mute mode, 20 Hz to 20 kHz)
  • dSNAKE inputs: remote source for CH1-32, ST1, ST2, ST3
  • dSNAKE outputs:
    • Patchable for Mix 1-10, LR, Grp 1-8, MTX 1-4
    • Compatible with AudioRacks AR2412, AR84, AB168
  • System:
    • Dynamic range: 112 dB
    • Frequency response: 20 Hz to 20 kHz (+0/-0.5 dB)
    • Headroom: +18 dB
    • Internal operating level: 0 dB
    • dBFS alignment: +18 dBu = 0 dBFS (+22 dBu at XLR output)
    • Meter calibration: 0 dB meter = -18 dBFS (+4 dBu at XLR output)
  • Indicators:
    • Peak meter indication: -3 dBFS (+19 dBu at XLR output), multi-point sensitivity
    • Signal meter indication: -48 dBFS (-26 dBu at XLR output)
    • Meter type: fast response (peak)
  • Sampling rate: 48 kHz ±100 PPM
  • Converters: 24-bit Delta-Sigma
  • Latency:
    • 1.2 ms (XLR input to XLR output)
    • 0.7 ms (XLR input to AES output)
    • Operating temperature: 0 to 35°C
    • Power: 100-240 VAC, 50/60 Hz, 150 W maximum
  • USB Audio:
    • Qu-Drive: USB A
    • Device: use a USB hard drive (not a USB stick)
    • Stereo recording: 2-channel, WAV, 48 kHz, 24-bit, patchable
    • Stereo playback: 2-channel, WAV, 44.1 or 48 kHz, 16- or 24-bit, to ST1
    • Multitrack recording: 18-channel, WAV, 48 kHz, 24-bit, patchable
    • Multitrack playback: 18-channel, WAV, 48 kHz, 24-bit
    • USB Audio Streaming: USB B, compliant with core audio
    • Send (upstream): 32-channel, WAV, 48 kHz, 24-bit
    • Return (downstream): 32-channel, WAV, 48 kHz, 24-bit
  • Controls:
    • Softkey buttons: 10
  • Groups:
    • Mute groups: 4
    • DCA groups: 4
  • Network: TCP/IP Ethernet for MIDI commands and iPad app
  • Input processing:
    • Sources:
      • Channels 1 to 32: Local, dSNAKE, or USB
      • ST1, ST2: Local, dSNAKE, or USB
      • ST3: Local, dSNAKE, or USB Stereo
      • Global USB source: Qu-Drive or USB B streaming
  • Stereo Linking:
    • Stereo Linking: Odd/even in pairs of inputs
    • Parameter linking: EQ, dynamics, insert, delay, assignments, sends
    • Link options: Preamp, polarity, sidechains, fader, mute, pan
  • Polarity:
    • normal and inverted
  • HPF: 12 dB/octave, 20 Hz to 20 kHz
  • Insert: assign FX1-4 to input channels
  • Delay: up to 85 ms
  • Gate:
    • Self-key sidechain
    • Threshold: -72 to +18 dBu
    • Depth: 0 to 60 dB
    • Attack: 50 μs to 300 ms
    • Hold: 10 ms to 5 s
    • Release: 10 ms to 1s
  • Equalisation:
    • 4-band fully parametric, 20 Hz to 20 kHz, +/-15 dB
    • Band 1: selectable LF shelving (Baxandall), bell
    • Bands 2 and 3: Bell
    • Band 4: selectable HF shelving (Baxandall), bell
    • Bell Width: variable, non-constant Q, 1.5 to 1/9 octave
  • Compressor:
    • Self-key sidechain
    • Threshold: -46 to 18 dBu
    • Ratio: 1:1 to infinity
    • Attack: 300 μs to 300 ms
    • Release: 100 ms to 2 s
    • Knee: Soft or Hard
    • Types: Manual Peak, Manual RMS, SlowOpto, PunchBag
  • Mix processing:
    • USB output:
      • Direct Out channel to USB: Follow fader, follow mute (global options)
      • Source selection (global): Post-preamp, pre-EQ, post-EQ, post-delay
      • Insert: assign FX to Mix channels
      • Delay: up to 170 ms
    • Equalisation:
      • Graphic EQ: 1/3 octave constant, 28 bands from 31 Hz to 16 kHz, +/-12 dB
      • Parametric EQ: 4-band fully parametric, 20 Hz to 20 kHz, +/- 15 dB
      • Band 1: selectable LF shelving (Baxandall), bell
      • Bands 2 & 3: Bell
      • Band 4: Selectable HF shelving (Baxandall), bell
      • Bell Width: variable, non-constant Q, 1.5 to 1/9 octave
    • Compressor:
      • Self-key sidechain
      • Threshold: -46 to 18 dBu
      • Ratio: 1:1 to infinity
      • Attack: 300 μs to 300 ms
      • Release: 100 ms to 2 s
      • Knee: Soft or Hard
      • Types: Manual Peak, Manual RMS, SlowOpto, PunchBag
    • Effects:
      • Internal FX: 4x RackFX processors, Send>Return or Inserted
      • Types: Reverb, delay, gate reverb, ADT, chorus, symphonic chorus, phaser, flanger
      • 4x dedicated returns for stereo FX: Fader, pan, mute, routing to Mix/LR, 4-band PEQ
  • Audio tools:
    • PAFL:
      • PFL or stereo in-place AFL
      • 0 to -24 dB trim
      • 85 ms delay
    • Talkback:
      • Assignable to any mix
      • 12 dB/octave HPF
    • Signal generator:
      • Assignable to any mix
      • Sine, white, pink, bandpass noise
  • General:
    • Dimensions (WxDxH):
      • Mounted on desk: 435.5 x 174.5 x 161.0 mm
      • Rack mounted: 483.0 x 135.4 x 177.0 mm, 4U
    • Weight: 5.8 kg

Product code: QU-SB/X

Unit of sale: piece

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