I am currently running a Rotel RB 991 to my mains and an RMB 1075 for my surrounds. I have constucted a 12V trigger for the RB 991 that is triggered via the 12V output from the RMB 1075. This works fine for me. Unfortunately, when I listen to 2 ch music, both amps fire up but I am only really using the RB 991. The RMB 1075 is on but is remaining idle. Is this a problem? Could I be causing any damage to the RMB 1075 or the speakers connected to it? J.