Alternator whine

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=84898
Printed Date: May 09, 2025 at 3:39 PM

Topic: Alternator whine

Posted By: SoundAudio
Subject: Alternator whine
Date Posted: October 31, 2006 at 4:08 PM

I have a Pioneer D1 in an 05 Mercury Mariner. I have already grounded the RCA's and it supressed the alternator whine but there is still some present. What should I try next, a ground loop isolator, or a noise filter on the power to the D1? Thanks for the help.

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Good Luck!
-Thad

Replies:

Posted By: aznboi3644
Date Posted: October 31, 2006 at 4:58 PM

Um...try making a new ground for the D1.

Also do your amp ground good???

Posted By: forbidden
Date Posted: October 31, 2006 at 5:26 PM

^^^^ speak English there Asian Invasion, not Engrish.(the grammer police were looking over my shoulder)

What have you done to the amps ground and read the grounding sticky.

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Top Secret, I can tell you but then my wife will kill me.

Posted By: aznboi3644
Date Posted: October 31, 2006 at 5:44 PM

haha my bad...I had overlooked that...shut up forbidden!!!

I meant does your amp have a good ground??? Must have spaced out while typing lol

Posted By: SoundAudio
Date Posted: October 31, 2006 at 7:12 PM

I have two amps MB Quart RAA1000 and RAA4200. 4 ga. each to a distro block and then 1/0 ga. to a stinger grounding terminal. Grounded to floor pan in the back where the metal has been grinded clean and the terminal is bolted down. I had ruled out the amps because I tried the setup with the factory stereo and a PAC LOC while the D1 was being repaired for the touch screen. The ground on the D1 is to the metal subframe behind the dash. Should i put a noise filter on power and ground for the D1? Thanks guys!

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Good Luck!
-Thad

Posted By: forbidden
Date Posted: October 31, 2006 at 7:21 PM

Disconnect the head unit from the amps. If the noise is gone, the head unit is the culprit and no amount of filters is going to fix a broken headunit. Thad, if you can borrow another head unit to try as well, preferably not a Pioneer.

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Top Secret, I can tell you but then my wife will kill me.