Alice Air 2016 is a quad guest headphone amplifier designed for the Air 2000 mixer. It occupies a three-width space on the meter bridge and controls four headphone pairs. Power and audio are routed from the meter bridge scrambler PCB via Phoenix/Euroblock connections, with no soldering required. Each kit includes a three-width front plate, two dual headphone amplifier PCBs, four knobs, and a wiring loom to the meter bridge scrambler PCB.