You should also check out the Aviom system
www.aviom.com. It's more money, has 16 channels per mixer, and each channel has pan control which is something you don't get with the Hearback. You can also save up to 16 mix presets and create groups. I've had a chance to use both and the Aviom is much slicker than the Hearback. On the other hand, if you can use the ADAT out . . . that's cool.