The Allen & Heath AR84 Expander is a compact, 8-input/4-output audio interface designed to extend the input/output capabilities of Allen & Heath’s digital mixing systems, including the Qu, Avantis, and GLD series. It features 8 XLR inputs and 4 XLR line outputs, enabling easy expansion for stage or studio setups. The unit connects to the main system via Cat5 cable using Allen & Heath’s dSNAKE protocol, ensuring low-latency, high-quality audio transfer over distances up to 120 meters. The AR84 is ideal for flexible, scalable setups, allowing for additional inputs and outputs in distributed locations, making it perfect for live sound environments or installations that require expanded I/O capabilities. Its rugged, rack-mountable design ensures durability for touring and fixed installations.