Axiom Home Page Forums General Discussion Home Theater Am I going insane?

Thanks Ray.

For $3, it is certainly worth a try!

You might want to try it without the grounding wire and try the cheater plug.

I've used it on a sub amp and once on an external power amp and it did the trick. BTW, they are about .59 cents at target/wal-fart/home depot etc., can't hurt to try it.

I have to use one of those "cheater" plugs with my Hsu subwoofer. Without that in place, she hums. With it...she rocks!

Same here but when I got rid of my old TV, the hum went with it. So I no longer need the cheater plug on the HSU.

Peter,

2x6 had a valid option - the fridge. Try this. Turn off every circuit breaker in the panel except for the one supplying power to the outlet that the reciever is plugged into. Unplug everything else from that circuit. If the hum is gone, turn on 1 breaker at a time until it comes back. Then, check everything plugged into that circuit that has either a motor or a power supply.

Good luck,

Great idea Mike & 2x6. I would not have thought of that myself. Plus, you get the added bonus of ending up right in front of the fridge when you are done and in need of a cold one!

Good point Michael. I took your suggestion.

I turned off all of the breakers except the one controlling the outkets in my HT. Then, I unplugged every device plugged into that circuit, except for the receiver. The receiver has nothing plugged into it except for 4 speakers.

There was still a hum!

BTW, I tried a cheater plug with no luck. I did not reverse the polarity by filing down the plug and inserting backwards, though.

Again, the hum is audible from a few feet away with the volume all the way down and then with increased volume, a hum gets louder. It actually sounds like a different hum gets louder, if that makes sense.

Here are my current theories:

1. I have unrealistic expectations of how quiet a recevier should be.

2. My old Sony receiver (and another old Sony receiver I have) have poor quality amps that produce noise.

3. I have noise in my power that is carrying though to my speakers. I previously did not believe this was possible, but I am not sure anymore.

Maybe I need an AC isolation transformer??

Help!

I'm guessing a combo of 1&2, but mostly 2. Could be very wrong, however...

Yep, I was thinking that testing another receiver in the mix might be the answer if the cheater plug didn't work. Can you borrow one from somebody just to test the theory?