RyanCHICL

iTrader: (1)

Ok guys bare with me here. I bought an Onkyo all in one home theater back in May. In June i noticed my subwoofer was sounding strange. It wouldn't put out a hard thump, instead it was making a hum noise that was distorted and rumbled (mostly noticeable at low volume). I took in for service and they could not find anything wrong with it. So i got it back and it worked fine. Now recently it has been making that distorted rumble noise again. I have been researching online but all I could find was issues with loop grounding. But I don't think thats the case. It seems to me that the receiver is sending feedback to the sub or its getting interference from something. I only have my television, dvd player and headphone jack for my ipod hooked up to it using RCA cables. Could the subwoofer cable be bad also? It doesn't sound like the sub is blown. Im confused guys. Any suggestions?

2001AudiS4

Well, did you try another cable just to test it?

doopstr

Hum is usually a ground problem. One thing to check would be your outlets. You can get a tool for around $10 at HD that will tell you if your outlets are wired correctly.

I have something like this...

2001AudiS4

Also, do you have a digital tv (i.e. LCD or Plasma)? If so, do you notice a hum bar that slowly scrolls up or down the screen? It would be a faint line that you sometimes can barely see, or sometimes is quite clear and visible. They are typically the product of a bad ground as well.

RyanCHICL

iTrader: (1)

This might help. Could there be a grounding issue if my unit is currently plugged into a power strip?

2001AudiS4: No i dont have a digital tv and i dont notice anything different if the tv is on.

Thanks guys so far for the suggestions, keep em coming? Im still have this issue.

RyanCHICL

iTrader: (1)

Does anyone think a new Monster subwoofer cable will do the trick?

2001AudiS4

Absolutely not. Monster cables are marked up 23450 to the 20th power. Just grab yourself a normal RCA cable and plug it in to test. See if you are still getting the hum.

is300eater

fixed

"...bare with me" means you want us to get naked with you...

RyanCHICL

iTrader: (1)

thats funny, didnt realize i made that mistake until you pointed that out. I guess i wasnt taking my time when i was typing.


Anyways, my cousin has a similar Onkyo home theater at his house. I will see if he has time for me to bring my sub over and hook it up to his. This way i will know if its the cable or not without having to buy a new one yet.

2001AudiS4

JUST TRY ANOTHER RCA CABLE. What's the point of asking advice if you do not follow it?

RyanCHICL

iTrader: (1)

Ok, I just went and got another cable, and its still doing the same thing. To describe the noise more, the sub sounds like its suffocating.