Recently purchases an HBP1 used. Waiting on the owners manual from Demeter. Questions are what is the difference between the two outputs and what is the best way to connect to amp to drive both channels. Finally, it came with a Mackie 1400i but I was considering moving to a QSC3002 or a Stewart 2.1. I know there are lots of opinions out there on this but anyone who feels like adding there two sense it would be appriciated. THanks.