cabel1975

CECAA850, Excellent information, THANK YOU! Bookmarking that for future reference.

Thanks babadono. Will probably take this route in hopes of repair. Also, that was my deduction on the grn/grnd wire also. The "bite marks" aren't seen as I sanded down that area thinking maybe the connection wasn't strong enough, but still in hum-land.

Confirmed that the amp is the problem by swapping a known-good speaker into the cabinet (same behavior). Next question then, anyone know where I can purchase just the AMP component? I also truly despise waste, so am reluctant to throw the whole thing out if it can be avoided. Thanks again fellow Klipsch'ers!

Thank you, Bryan. Took your suggestions, just spent a few hours inspecting all wiring and replaced a few wires that were questionable. Alas, am still in HUM-land. Considering now whether to replace the actual sub-woofer ('speaker') or replace the in-cabinet amp portion of this unit. I think I can steal a sub/speaker from another system and hook it into this one just to test and take this sub/speaker and put it in the other system to at least test out the theory that maybe i can replace one piece or the other. Thanks again, Chris in Denver, CO

This happened years ago and I vaguely recall "popping the hood", tightening some connections and all was well until two nights ago. Hopefully the pictures will illustrate, but here's my best description: Relatively loud hum....even if plugged in all by itself to the wall. This unit is a two prong plug FWIW. This time when I popped the hood, I found a ground cable that was just dangling out there....one end is not connected to anything. Pretty sure this is kinda sorta a problem. It is a very short ground wire. The side that is connected is attached to a post on the power-supply/transformer. For the life of me I cannot see where the other end is supposed to be going. I tried screwing it to the overall frame (sounds logical) but that made zero difference in the problem. I also discovered that two of the rubber mounts for the power supply/transformer have split/appear to be broken. These appear mainly to be for isolation so broken rubber sitting on broken rubber shouldn't be a big deal, so I do not think that is my root cause? Help is GREATLY appreciated. LOVE this sub for its quality and also severe sentimental attachment.