Whining noise when using butchered CD changer method and revving

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Mar 29, 2011 | 11:50 AM

#21

WhiteXKR

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From: Arlington VA USA

Quote:

Originally Posted by jagosaurus

But the noise issue is there with the signal cables disconnected from the cd changer.

I thought you meant unplugged from the RCA connectors. Do you mean completely undoing the wiring?

Quote:

Originally Posted by jagosaurus

So you suggest to ground the iphone signal RCA ground to the chassis close to it? Shouldn't its ground be close to or shared with the power amp?

A good chassis ground connection is lower impedance than any wire. Very close to the amp is good, but running a a ground wire from the amp to the iPod is not as good as a chassis connection.

Quote:

Originally Posted by jagosaurus

I can make a cable shield for the cable stubs in the cd changer and see if that helps, also ordered an 12 amp alternator noise eliminator I can play with.

Also, the noise is still there if connecting the iphone in the trunk (running on its batteries).

The noise eliminator might help Does it install on the alternator or in series with the electronics? Still think you might need continuous shielding on the cable as well as inside the changer.

Last edited by WhiteXKR; Mar 29, 2011 at 11:52 AM.

Mar 29, 2011 | 12:07 PM

#22

jagosaurus

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Joined: Jan 2011

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From: San Francisco

Only when it's on

Apr 1, 2011 | 02:48 AM

#23

jagosaurus

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Senior Member

Joined: Jan 2011

Posts: 379

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From: San Francisco

Got a new ground loop isolator from PAC: Amazon.com: PAC SNI1 Noise Isolator: Automotive

And connected its ground to the bolt bolting down the amp/cd changer rack. Problem solved. Next up I want to try to remove it from the signal path and just do the grounding