Hi folks, I'm not sure whether this is the right forum for this request but couldn't see an obviously better one. I managed to short my Perreaux 350 power amp a few weeks ago - it would have helped to turn it off before changing the speaker cables... - and need to locate an engineer to solve the buzz I now have on both channels. I have previously taken it to Bartletts in Holloway, north London, but have since moved to the sticks of Crystal Palace and am struggling to locate someone who can do repairs on decent kit. Anyone on here have any ideas or advice? Thanks, Rich