BAD Noise Problem - Baseball Bat??

[Amokie 10+ year member]

I know you get a million of these but this one is making me want to throw away my system.

CAR OFF:

Extremely Loud Hissing and buzzing. Clicks when I turn up volume. I can actually hear noise from the disk spinning from my speaks.

CAR ON:

****ING CRAZY LOUD buzzing, and alternator whine. Almost as if the HU is not grounded at all.

THE STORY:

- Had a 5awg to 8awg Scoshe wiring kit = Sounds Perfect

- "Upgraded" to Stinger 4awg to 4awg x2 dist block. There is a dist block after that going from 4awg to 8awg for the comp amp. (Accepts only 8awg) = Tiny alt whine, but it still pissed me off

- Had my system disconnected while I waited for my sub. In that time I organzed the amps etc on an amprack. Dist blocks all mounted on the rack. = LOUD NOISES!!!

WHAT I KNOW

- HU and Amp Grounds are okay (Tried HU ground to neg on battery, same thing)

- RCA are fine

- Noise is gone when rca disconnected from HU and AMP.

THE EQUIPMENT

- Kenwood MP5something (couple years old)

- Fosgate 600.4 bridged (for comps)

- Crystal Mobile Comps

- Xenon 600.1

- RL-P 12 (sub is fine, maybe because freq. are too high?)

I'm thinking that the HU is bad, but could a bad HU even make noises like this? How can I test this?

Thanks for taking the time to read this, and thanks in advance for the helping.

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[helotaxi 5,000+ posts]

Def sounds like a HU problem. If you have access to another type of source (portable CD or MP3 player) unit you can hook that up to the amp directly and rule out the amps.

How do you know that the RCAs are good?

 

[BassAddictJ 5,000+ posts]

i accually had some bad background noise/interferance with my sub amps......for shits and giggles i tried a $15 rca noise filter from walmart and it solved the problem.....if you can find the source of the noise, see fi youc an filter it out a i guess....worst case senario it doesnt work and u get ur 15 bucks backw ith ur reciept....good luck man

 

[Amokie 10+ year member]

How do you know that the RCAs are good?

I've tried 4 different RCA, same problem.

i accually had some bad background noise/interferance with my sub amps......for shits and giggles i tried a $15 rca noise filter from walmart and it solved the problem.....if you can find the source of the noise, see fi youc an filter it out a i guess....worst case senario it doesnt work and u get ur 15 bucks backw ith ur reciept....good luck man

I was gonna try that, but there is def. something wrong and I'm scared to just cover it up, I dont want it to damage anything later. I am going to buy one to try to diagnose the problem though.

Thanks for the Replies.

 

[Chevillac 5,000+ posts]

what kind of head unit is it? pioneer?

 

[Amokie 10+ year member]

Kenwood

 

[Amokie 10+ year member]

Hooked my laptop to my amp and it works fine. I guess my HU is ****ed up.

 

[ssj2xxgotenxx 10+ year member]

There you go... Get a new HU and call it a day.