The Allen & Heath SQ-Rack is a powerful 4U rack-mountable digital mixer designed for live sound, studio production, and installation applications, delivering high-performance 96kHz processing in a compact format. It offers 48 input channels, 36 total buses, 16 local XLR mic/line inputs, stereo TRS and 3.5mm inputs, and 14 assignable analogue outputs including XLR and TRS connections. Equipped with a 7-inch capacitive touchscreen, assignable SoftKeys and SoftRotaries, and six layers supporting up to 96 assignable channel strips across fader, processing, and routing screens, the SQ-Rack provides flexible and intuitive control. The mixer features eight stereo FX engines with dedicated returns, the RackExtraFX suite, DEEP processing including Automatic Mic Mixing, comprehensive input and output processing, and dual real-time analysers for accurate system tuning. Connectivity options include SLink EtherCON for up to 128x128 channels of remote audio expansion, an option card slot supporting Dante, Waves, or MADI, AES digital output, and a 32x32 class-compliant USB audio interface. With SQ-Drive for direct stereo and multitrack recording to USB, extensive scene management, MIDI control, remote mixing apps, and compatibility with the ME personal monitoring range, the SQ-Rack is a scalable and professional rack solution for demanding audio environments.