I have a pair of 7B-SST2 amps I purchased new in 2009, listened to for 2 years, then got some different amps. I had the Brystons on a shelf until a month ago, fired them up and they sound good. No problem on start up, no noise from amps, and music sounds great--have had them playing a few times. Problem is, when I switch one of the amps off, there is a very short blip of static through that speaker--not loud, not damaging to speaker. This occurs even when no preamp or CD player is hooked up. I have plugged amps directly into the wall, then have placed an inductive transformer in between wall and amps to see if that made a grounding difference--no change. Any ideas? Thanks!