I would unplug all the equiptment from the Monster 3500 and temporary use a power strip to see if the hum disappears..If so then the Monster did its job but got fried.If its not the Monster then for some reason you have developed a Ground Loop Hum from one of the pieces of equiptment.Put a 2 prong cheater adaptor on each piece of equiptment (one at a time)to see which one may be causing the hum.If the hum disappears that unit developed a grounding problem.
hum from speaker
After power outage in my home yesterday I tried to play dvd movie and I heard loud hum coming from my speakers .Then I played cd and the same hum came from speakers.I did not have that problem before ,only after that power outage.Please help.Thank you.My systems are dunlavy sc 4 main speakers,krell HTS 1 processor ,aragon 8008x3 3 channel power amp,carver TFM 35 2 channel power amp for surround speakers plug in to monster hts3500 surge protector.