RT1000 Help Needed - Speaker Hum Issues

ghwk

I have a pair of RT1000's, my guess is 10 years old or so and they have been working flawlessly. Last night both the right and left developed a humming noise. The speakers are connected to a Yamaha RX-V2600 receiver and have been for years. The powered subs in the Rt 1000's are plugged into an APC H10 Power Conditioner, also been in that configuration for years. If I turn on the receiver now the speakers start to hum. If I unplug them from the APC unit the humming stops and the volume on the speakers is barely audible. If they are still plugged into the APC when I turn off the receiver the speakers still hum. Unplugging them from the APC it stops. Plugging them back into the APC they do not hum until I turn the receiver on.

I have also tried plugging them into another power supply and bypassing the APC and they do the exact same thing. I am baffled because absolutely nothing has changed in the system or connections to have triggered this, not has any electrical work been done on the house etc.

The gold jumper bars are in use on the speakers and only the speaker wire runs from the Yamaha to the speakers. I also have a Bose Subwoofer, a Polk Center Channel, and Polk rear speakers. None of these hum.

Suggestions????

Thanks!

so_ein_pech

Its interesting that they both started to do it at the same time. Does the humming stop when you switch them off in the back?

It sounds like the power supply on the built-in amps is toast (the part that converts AC to DC current). The likely culprit is the big filter capacitors are leaky. This happened to me, and I was able to fix it by replacing them.You can do it yourself if you have a soldering iron, or take them to your local stereo repair shop. Polk will fix them or replace them for you, too, if you don't like money.