Hear Technologies Hear Back Hub A basic Hear Back system consists of a Hub and personal Mixers connected using standard CAT5E cables A single Hub supplies signal and power to a maximum of eight Mixers That's one for you and everybody in the band If that's not enough, the Hubs can be daisy-chained using the HearBus In and Out for virtually unlimited system size The Hear Back Hub can accept analog input signals from audio mixers, auxiliary, matrix, monitor, and/or direct outputs