The Allen & Heath CQ-20B is a powerful and flexible stagebox-style digital mixer designed for live sound, bands, and installed audio systems that require expanded connectivity and wireless control. It provides 20 inputs to mix, including 16 mono or linkable channels and 4 stereo channels, along with a stereo Main LR output and six aux outputs that can be linked for up to three stereo mixes. The unit features eight XLR mic/line inputs and eight XLR/TRS combi mic/line inputs, two of which offer Hi-Z support for direct instrument connection, plus two stereo line inputs for additional playback sources. On the output side, it includes eight XLR outputs, two TRS Alt outputs, and a dedicated stereo headphone output for flexible routing and monitoring.

With 96kHz input and output processing, the CQ-20B delivers high-resolution audio performance, complemented by four built-in multi-FX engines for professional-quality effects. Dedicated stereo USB and Bluetooth inputs allow easy playback integration, while recording options are extensive, including USB-A for stereo recording and data, USB-B for 24x24 multichannel audio interfacing, and an SD card slot for 24x24 multitrack recording and playback.

Designed for streamlined operation, the mixer supports configurable single or dual footswitch control and features customizable chromatic channel meter LEDs for clear visual feedback. Built-in dual-band WiFi enables the CQ-20B to function as a wireless host, while an RJ45 port allows network client connectivity. It is rack mountable with an optional kit and powered via an IEC mains connection with a worldwide PSU. Full control is available through free apps for Windows, macOS, iOS, and Android, making the CQ-20B a versatile and modern solution for professional audio applications.