Subwoofer noise w no input??

[mtrycrafts]

So far so good! if it had been a cell phone or a motor, I would had the problem since I first bought it. This started happening a year later...
thanks to all for the past info as it's good to know other possible causes...
Regards

That's great. Apparently the amp had a filtering part failure.

 

[TragicMagic]

Hi All

I have possibly a similar issue...

Every time someone turns on the heat-lamp / fan unit in the bathroom, I get a loud low hum in the subwoofer. Nothing else interferes with it.. only the bathroom heatlamp and exhaust fan unit! The bathroom is not physically located anywhere near the subwoofer.

Any ideas / help very much appreciated!!

 

[Pwner_2130]

<font color='#008080'>Just a thought - this doesn't correspond to your cell phone ringing does it? I had this problem in my vehicle. Kinda cool, cause I had a 3-second warning every time my phone was going to ring...</font>

I had a similar problem running a wireless mouse and keyboard near my Sony reciever...noticed when i had my PC connected to the STR_DG800 via analog, i would get a thump from my Klipsch. I removed the wireless hub from my PC and the thump went away, apparently the wireless mouse signal interferes with the LFE signal.

 

[ballison]

Thump in my Supercube II

Like others here, I had a random deafening "thump" start occurring, and at some point, the sub quit working entirely, except for the random "thump". even with the input cable disconnected. Alas, no cell phones around, and I have not checked the circuit for other appliances...thats a good suggestion. However Def Tech is putting a new amplifier assembly in it, and I should get it back next week. Best I can tell from what they say, is there was probably a low-voltage "brown-out" situation while I had it cranked up, resulting in too many amps sucked through the amplifier circuit. So, I'm out shopping for a voltage regulator. Anyone else out there with similar experience?

 

[ballison]

subwoofer thump

in hopes of getting some responses....heres more. The dealer replaced the pre-amp, it was dead, not really sure why it died. Took it home, and worked fine for a day, the next day, a couple thumps and it was gone again....back to the dealer. hmmmmm