Allen & Heath AB168 16x8 Digital Stage Box for Qu / Avantis / SQ Mixing Systems

The Allen & Heath AB168 is a digital audio stage box that forms a critical link in modern live sound setups by moving microphone and line-level inputs/outputs directly to the stage while transmitting pristine digital audio over a single cable to a compatible mixing console. Designed for seamless integration with Allen & Heath's Qu, Avantis, and SQ series digital mixers, it effectively extends the I/O capabilities of these systems, allowing the main console to be positioned at the front-of-house or monitor position with minimal analog cabling. The stage box houses 16 premium XLR microphone inputs with high-headroom preamps and switchable phantom power, plus 8 XLR outputs for sending mixes to stage monitors or driving external processors, all in a rugged, compact enclosure built to withstand the demanding environment of the stage.

The AB168 connects to the mixing surface via Allen & Heath's proprietary dSNAKE protocol, utilizing a single Cat5e or Cat6 cable to carry bidirectional, multi-channel digital audio. This connection not only transmits audio but also carries remote control data, allowing engineers to adjust preamp gain, phantom power, and polarity for every channel directly from the console's surface or iPad app without needing to access the physical stage box. The digital transmission ensures signal integrity is maintained over long distances (up to 100 meters) without the noise, interference, and signal degradation associated with long analog cable runs. The unit is designed for daisy-chaining, enabling multiple AB168s or other compatible stage boxes to be linked together to expand the system's total I/O count as needed for larger productions.

Constructed with a robust steel chassis and featuring comprehensive status indicators for power, signal, and network activity, the AB168 is built for reliability in touring and fixed installation applications. Its design prioritizes ease of use and integration, with a clear front-panel LCD for device configuration and gain setting when accessed locally. By centralizing analog connections at the source and leveraging efficient digital networking, the Allen & Heath AB168 digital stage box provides a clean, flexible, and high-performance I/O solution that simplifies system setup, improves audio quality, and enhances workflow for engineers using compatible Allen & Heath digital mixing ecosystems.