ON EBAY Hi there, Had a distribution amp shipped to me DOA, I sent it back to Rolls for servicing, and figured out another solution in that time. It's been sitting around for a couple years now, still in the box and bubble wrapped from Rolls. It will ship with the original service slip that it was returned with. *it is now refurbished and totally functional* From the Rolls Website: The RA63s is an eight channel mono, or four channel stereo distribution amplifier designed for the contractor / install market. The outputs are designed to drive high-level balanced lines in a sound distribution system. The screw terminals on the rear panel are for input and output, and each output may power more than one line.