Hello, \n\nI am running a Rotel RC-1590 preamp with balanced connection into a dbx DriveRack PA2, into twin Marantz MM7025 amps, into Klipsch 6000F speakers. I am able to get sound when using jumpers with this setup but not without jumpers. I'd really like to have a true bi amp setup after going through all of this time and expense. \n\nThe question is: what's the problem with the no jumper mode? It doesn't work. Is there a short in the speaker wires? I did disconnect the internal speaker crossovers and the wires are only twisted, bare and not soldered yet. It screams with the jumpers on though. \n\nCould it be my amps going into protect mode for some reason. Any info would be super. Thank you!