Totally baffled by subs humming

[RADEoN 10+ year member]

well this has been going on for a year now, whenever I am at low RPM, my subs make a very audible buzzing sound, and at higher RPM it's almost gone.

Whenever I disconnect the RCA's from the headunit and plug another media source in, there is no humming.

There is no humming in my frontstage amplifier.

Whenever I disconnect both my ground and my antenna, it won't work, but if I plug in my ground, it still won't work. It only works when I am grounding it with the antenna.

I've tried grounding the headunit to a separate location all together, and it won't even turn on, it just kinda clicks and tries to turn on, as if there were no ground connected to it at all, and why it does that I'm baffled, as it should do nothing without a ground.

Whenever I perform any action, like turn signal or hazard lights, it is audible through the subs, and whenever my lights dim after my car is off, it is a loud hum that gets lower with the lights.

I'm totally clueless.

Click to read more...

 

[breed_corona07 10+ year member]

im not positive it will work, but i work at radio shack and we sell this deal called a ground loop isolator, it supposed to eleminate electrical noise in audio lines, and its less than twenty buck, here a link http://www.radioshack.com/product/index.jsp?productId=2062214

 

[shaneb 10+ year member]

Well. It sounds like the issue is entirely in your HU, since you proved your RCA's and other components on the other side of it to be working with your ipod or whatever.

Not to dis radio shack, but I would not recommend using a ground loop isolator. That's like putting a bandaid on something, it just covers up your real problem.

Let us know what kind of HU you have.

I am sure someone else on here has had to deal with a ground loop on it if thats a common issue with the HU.

 

[outspoken 10+ year member]

try this...

http://www.caraudio.com/forum/showthread.php?t=198477

 

[bonesninja 5,000+ posts]

sounds like a bad ballast...

 

[shaneb 10+ year member]

sounds like a bad ballast...

A joke?

Or actually a bad ballast? In the cars elec system?

That's quite interesting.

 

[bonesninja 5,000+ posts]

A joke?Or actually a bad ballast? In the cars elec system?

That's quite interesting.

a joke really....i hate the humming sounds of flour. lighting

 

[mrjoeyjiffy 10+ year member]

wow very productive input, back on topic....

 

[mlstrass 5,000+ posts]

some HU's need the ant connected to make a proper ground. Not sure why, but I've run into it a few times...

maybe try grounding directly to the batt or try the ground loop isolator.

 

[RADEoN 10+ year member]

some HU's need the ant connected to make a proper ground. Not sure why, but I've run into it a few times...
maybe try grounding directly to the batt or try the ground loop isolator.

I tried grounding my RCA's and I've had a ground loop isolator, still no luck.

Thanks for the input.

The headunit is a JVC KD-AVX1

 

[fast85_gt]

let me know what you do to fix it couse i have the same thing but comes and goes so id say bad ground but im to lazy to fix it

 

[RADEoN 10+ year member]

let me know what you do to fix it couse i have the same thing but comes and goes so id say bad ground but im to lazy to fix it

me too, i've tried new grounds for my headunit and grounding the antenna right to the car, I have no **** clue.