weird sound after ground loop isolator

[james212 10+ year member]

I think I have a ground loop. Alternator whine, static. I can even hear my deck starting up and spinning my CD.

I tried to install a ground loop isolator from Best Buy. I hooked it up and turned my stereo on.

My speakers just starting making a siren sound that started getting higher and higher in pitch (like a bomb was going to explode). What am I doing wrong here?

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[jmanpc 5,000+ posts]

ditch the ground loop isolator and fix the root of your problem. start by making a better ground for your head unit. Ground loop isolators just hide the problem, not eliminate it.

If you have a Pioneer head unit, try grounding the RCA's. That gives lots of people problems.

 

[azbass 5,000+ posts]

you car is going to explode!

dont ground your HU in the dash.

 

[jmanpc 5,000+ posts]

http://www.caraudio.com/forum/showthread.php?p=2486960#post2486960

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[azbass 5,000+ posts]

^^^^ No No No

 

[james212 10+ year member]

Here's the thing. I've regrounded my amp many times. I've tested both my HU ground and amp ground with a DMM and they are both giving me just a tiny resistance.

I've tried different RCA cables (though they were cheap ones from "The Source") and still know luck.

What problem could possibly have a ground isolator make that sound? Could a wire have come loose on one of my component speakers?

 

[azbass 5,000+ posts]

what kinda HU? is a pioneer?

 

[james212 10+ year member]

Here's what I have:

Naka CD-500

KnuKonceptz Amp kit

Memphis ST300D (5 years old)

Rainbow Germaniums

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