i was listening to my 2 channel. but i turned the Radii preamp (tubes) off and heard a buzzing in my amplifier (the carver). Actually, the carver allways has a low buzz, but the buzz got louder for about a second when i turned the preamp off. I then turned it on again after a couple of seconds, and the speakers made a low rumble/thump, I looked at the carver and the protection circuit light was on. I quickly turned the entire system off via switch on my surge protector. I waited a little bit and then powerred it up like normal. power strip switch on, then preamp, then wait 20 seconds (per Russman) and turn the amp on. Amp made same low buzz it allways made. system worked fine like allways (which is good news)
but what happenned? i only want to know so i learn and avoid in the future.
It shouldnt be related from what i know, but i did switch the tweeters in my SDA 1B's to the replacement tweeters just before i initially turned my system on. I listened for 15 minutes when i turned the preamp off the first time as noted above.
as i said in title ........ WTF did i do?!?!?!?!?!?!?!