My good friend has recently came across a B&K 7520 Series 11 amplifier...worked great for a few weeks and then ran into a problem the other night. Seemingly, he was watching a show and then encountered a loud pop...center channel ran away on a siren type noise and then he shut the system down. He left for a couple of days and returned to turn the unit on and then encountered a white noise sound emitting from the center channel then the B&K lost power...the dreadful smell of electrical malfunction was present.
The funny thing about this is that he is not pushing the amp to anything close to it's limits...rather each channel is turned WAY down on the amp and the individual channels from the pre-amp are allowing a great deal of headroom.
He was able to remove the fuse from the back and we inspected it. No telling the condition of the fuse as it is coated from the factory in a matte finish and does not allow a clear view to the inside condition of the fuse. the plan is to obtain a new fuse this morning.
In closing, I am curious to know if anyone in the forum has had a problem with an amplifier like this? Is the channel that he using for his center toasted?
Any help/ideas would be great. Thanks in advance and have a great weekend Polk folk.