at about 4 this morning a was awakened from a super loud hummmmmmmmmm-thought a plane was crashing into my house

.
got up to investigate and when i walked past the 2channel room it got louder.bolth amps that were hooked up to the left chanell of my tempest were going wild

(left main and sub)
i turned everthing off, unplugged and went back to sleep.
boy its nice to have a guy like klaus behind what you buy, i didnt get upset(not like me at all) because i know how well klaus will service the unit.
got up at 7am and turned everthing on and the humm was still there, oh well-i hooked my yamaha back up and the hummm was gone.
its nice to know that what you bought will be taken care of,that little piece of mind let me get back to sleep with no problem.
i realise its a fluke thing , but i dont think i'll be leaveing the amps on 24/7 anymore.wouldnt want this happening while i was at work.