The Allen & Heath QU-SB Digital Mixer is a compact yet powerful digital mixing solution designed for live sound and studio applications. This innovative mixer features a 19-inch rack-mountable design, making it highly portable and space-efficient. Equipped with 16 onboard mic preamps and expandable to 32 channels, the QU-SB delivers exceptional audio quality with its 24-bit/48kHz resolution. The mixer is controlled via the Qu-Pad app on an iPad, providing a wireless and intuitive interface for mixing from anywhere in the venue. With its advanced DSP processing, it offers a wide range of effects, dynamic controls, and automatic mic mixing capabilities. The QU-SB also supports multi-track recording directly to USB drives and integrates seamlessly with DAWs via USB-B connectivity. Built with robust construction, it ensures durability and reliability for demanding live environments. The Allen & Heath QU-SB Digital Mixer is the perfect blend of flexibility, control, and professional-grade performance.
• 16 local Mono Mic/Line Inputs (TRS + XLR)
• Recallable AnaLOGIQ Preamps
• 1 Stereo Input (TRS)
• 12 local Mix Outputs (XLR)
• 1 Stereo Output (TRS)
• Expandable up to 32 input, 24 out using dSNAKE AudioRack
• Up to 11 Monitor Mixes (4 mono + 7 stereo)
• 4 Stereo Groups (switchable to Mix mode)
• 4 FX Engines
• 4 dedicated FX Sends / Returns
• 4 Mute Groups
• 4 DCA Groups
• 32×32 USB Audio Interface
• Qu-Drive Multitrack Recording / Playback direct to USB device
• dSNAKE Remote Audio Port
• Qu-Pad fully-featured iPad App
• Qu-You iPhone / Android personal monitoring app
• Qu-Control customisable iOS app for simple wireless control
• Trim, polarity, HPF, gate, insert, 4-band PEQ, compressor, delay on all Inputs
• Insert, 4-band PEQ, 1/3 octave GEQ, compressor, delay on all Outputs
• Automatic Mic Mixer
• Channel Ducker on all Inputs
• ProFactory Mic Presets
• iLive FX Library
• Built-in Signal Generator
• RTA with Peak Band indication
• Spectrogram to aid feedback elimination and room acoustics
• DAW MIDI Control
• Compatible with ME Personal Mixing System
• 19” Rack Mountable with optional rack ears
Mic/Line Inputs: Balanced, XLR and 1/4" TRS jack, fully recallable
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): >5k(omega) / >10 k(omega)
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)
ST1, connector Balanced, 1/4" TRS jack, half normalled
Input Sensitivity (ST1, ST2 / ST3): Nominal +4dBu / 0dBu
Trim: +/-24dB
Maximum Input Level (ST1,ST2 / ST3): +22dBu / +18dBu
Input Impedance: >7k(omega)
Mix1-10 and LR Out: Balanced, XLR
Output Impedance: <75(omega)
Nominal Output: +4dBu = 0dB meter reading
Maximum Output Level: +22dBu
Residual Output Noise: -90 dBu (muted, 20-20kHz)
Mtx 1-2 Balanced, 1/4" TRS jack
Source (Alt Output / 2Trk Output): Patchable / LR post-fade
Output Impedance: <75(omega)
Nominal Output: +4dBu = 0dB meter reading
Maximum Output Level: +22dBu
Residual Output Noise: -90 dBu (muted, 20-20kHz)
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: Measured balanced XLR in to XLR out, 0dB gain, 0dBu input
Dynamic Range: 112 dB
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
Control:
SoftKeys :10
Mute Groups: 4
DCA Groups: 4
Network: TCP/IP Ethernet for MIDI and iPad app
Input Processing Source:
CH1-32 Local, dSNAKE, or USB
CH1-32 Local, dSNAKE, or USB
ST2, ST3 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, sidechains, 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), Bell
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, Post-Delay
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), Bell
Bell Width: Non-constant Q, variable, 1.5 to 1/9th octave
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: 150W
Qu-Drive: USB A
Stereo Record: 2 channel, WAV, 48kHz, 24-bit, patchable
Stereo Playback: 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): 32 channel, WAV, 48kHz, 24-bit
Return (downstream): 32 channel, WAV, 48kHz, 24-bit
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 FX: 4x 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
PAFL: PFL or stereo in-place AFL, 0 to -24dB Trim, 85ms Delay
Talkback: Assignable to any mix, 12dB/oct HPF
Signal Generator: Assignable to any mix, Sine / White/Pink/Band-pass Noise
RTA: 31-Bands 1/3 octave 20-20kHz, follows PAFL source
Dimensions & Weights (W x D x H):
Desk mounted/stagebox use 435.5 x 174.5 x 161 mm (17.2" x 6.9" x 6.4")
Rack mounted: 483 x 135.4 x 177 mm (19" x 6.9" x 7") 4U
Packed in shipping box: 550 x 270 x 270 mm (21.7" x 10.6" x 10.6")
Unpacked weight: 5.7 kg (12.7 lbs)
(1) Allen & Heath Qu-SB Mixer
(1) Power Cord
(1) Operator's Instructions
