Hear Technologies Hear Back OCTO HubA single Hub supplies signal and power to a maximum of eight Mixers. To expand your system, the Hubs can be daisy chained using the HearBus In Out for virtually unlimited system size. The Hub accepts analog input signals from an audio mixer such as auxiliaries, matrix outs, sub outs, monitor outs, and or direct outputs. The ADAT input can come from digital audio workstations, digital recorders, or digital mixers. Hub Features: Three switch selectable