Allen & Heath SQ-Rack Digital Rackmount Mixer

Allen & Heath SQ-Rack 48 Channel / 36 Bus Rackmount Digital Mixer

The Allen & Heath SQ‑Rack is a high-performance, 48‑channel digital rackmount mixer that brings the full power of the SQ series into a compact 4U form factor. Built around Allen & Heath’s 96 kHz XCVI core, the SQ‑Rack delivers ultra-low latency (< 0.7 ms), pristine audio quality, and expandable connectivity – all without physical faders. With native I/O, remote control via apps, optional network cards (Dante, Waves, MADI), and onboard processing, it’s tailored for live sound, installations, touring, and in-ear monitoring systems.

Designed for professionals who need depth and flexibility in a rackable package, the SQ‑Rack combines processing power, audio fidelity, and scalable expansion — making it ideal for audio engineers, AV integrators, and tour systems that demand compact yet capable digital mixing.

✅ Key Features & Highlights

Core Processing & Audio Quality

• Powered by 96 kHz XCVI FPGA core with high precision and ultra‑low latency (< 0.7 ms)

• Supports 48 input channels and full internal processing headroom using a 96‑bit accumulator

• Fully integrated DEEP plugin architecture across all input channels and mixes, enabling compressor, EQ, and other modeling tools without external gear

I/O & Connectivity

• Onboard I/O includes 16 mic preamps + 1 talkback channel, and 3 stereo line inputs Outputs: 12 XLR line outputs, 2 TRS outputs, and an AES digital output

• SLink port for expansion and remote I/O (e.g. Allen & Heath’s Everything I/O range)

• Dual network card slots (64×64) for adding Dante, Waves, MADI, or additional SLink capability

Mixing Structure & FX

• 12 stereo mixes + LR main output buses

• 3 stereo matrix buses (which can split into 6 mono matrices) for flexible routing

• 8 stereo FX engines with dedicated returns, loaded with the RackExtra library of reverbs, delays, modulation, and classic effects Each input channel features HPF, fast gate (with sidechain/filter), 4‑band parametric EQ with RTA, and Peak/RMS compressor Mix buses include parametric + 28‑band graphic EQ and compressors built in Advanced

• Automatic Mic Mixer (AMM): supports either two 24‑channel mixers or combined 48‑channel mixing to maintain clarity in multi-mic environments (e.g. conferences, panels)

• Though faderless, control is intuitive via a 7″ capacitive touchscreen, 8 assignable SoftKeys, and 4 assignable Soft Rotaries with LCD labels

• Virtual “fader screen” offers level control for any channel without physical faders

• Remote control using SQ‑MixPad (iOS, Android, Windows, macOS) for full mixing from anywhere in the venue

• SQ‑Control app delivers simplified control mode for non-technical users; SQ‑4You app gives performers access to their monitor mixes

Recording & USB Interface

• SQ‑Drive: direct multitrack or stereo recording to USB storage — no extra software required

• 32×32 96 kHz USB interface (ASIO / Core Audio compliant) for DAW integration, playback, and virtual soundchecks

Physical & Expandability

• 4U shallow rackmount chassis, designed to fit into in-ear monitor (IEM) racks and touring setups  

• Durable metal construction; flexible mounting options (front or rear) for installation setups

• Compatible with ME personal monitoring system — chain ME‑1 or ME‑500 units off the SLink port or remote expanders