The Allen & Heath AH-AB-168 is a professional 16-channel digital stage box designed to serve as the remote input and output hub for Allen & Heath's Qu, Avantis, and SQ series digital mixing consoles. This unit effectively moves the analog-to-digital conversion point to the stage, allowing long, noise-prone analog microphone cable runs to be replaced with a single, robust digital network cable. It provides 16 high-quality microphone preamplifiers with remote gain control, phantom power, and high-pass filters—all adjustable directly from the mixer's surface or a connected iPad. In addition to the microphone inputs, the unit offers 8 line-level outputs on XLR connectors, which can be used for sending monitor mixes, auxiliary feeds, or main outputs directly to amplifiers and powered speakers on stage, completing a full, bidirectional digital audio path.

The AB-168 connects to the mixing console via a single Cat5e or Cat6 cable using Allen & Heath's proprietary, low-latency dSNAKE protocol. This connection carries power to the stage box, digital audio for all 24 channels (16 in, 8 out), and comprehensive control data. This streamlined cabling drastically reduces setup time, cable weight, and stage clutter compared to traditional analog multicore systems. The stage box is built into a rugged 2U rack-mountable steel chassis, designed to withstand the physical demands of touring and installed use. Its front panel features clear metering LEDs for each input, providing immediate visual feedback for signal presence and clip warnings, which is invaluable for quick troubleshooting during soundcheck.

Integration with the compatible mixer is seamless; the stage box is automatically detected and its I/O appears as a direct extension of the console's own inputs and outputs within the software. This allows engineers to leverage the full processing power of the mixer—including EQ, dynamics, and effects—on signals captured at the stage with pristine quality. The AH-AB-168 is a cornerstone of modern digital audio workflows, offering touring engineers, house of worship technicians, and installers a reliable, high-performance, and scalable solution for managing stage audio with exceptional fidelity and operational efficiency.