noise bose speakers

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=114868
Printed Date: September 17, 2025 at 6:58 AM

Topic: noise bose speakers

Posted By: filtercharger
Subject: noise bose speakers
Date Posted: July 05, 2009 at 2:39 PM

Hello everybody!

Yesterday I began to install a system in my cousin's 2001 Mercedez CLK 320, equipped with Bose. Everything went fine, no issues, until I fired up the 4ch amp I installed, a Crunch 4ch with around 110w rmsx4. The factory Mercedez head unit was replaced with a Pioneer Premier unit, I removed the Bose factory amp, but did leave the stock Bose speakers per my cousin's request. I tapped into the output wires that came out from the Bose amp. I did the 9v battery "pop" test to confirm all the wires were correct.

The problem is, there is noise coming from the speakers even with the car off, the noise is like a humming sound. Once you turn on the car, it gest worst. Since the battery is in the trunk, there are only about 4 ft of power wire by the time it gets to the amp. And the ground is to a metal part of the body, within 2 feet of the amp, paint stripped and all!

I've heard that the problem could be due to the impedance of the Bose speakers, and also that a complete rewire is a must!, but why?, the OEM wires were of a decent gauge(16) and don't they connect directly to the speakers?

Any help is greatly appreciated!

Frank

Replies:

Posted By: i am an idiot
Date Posted: July 05, 2009 at 2:52 PM

Some Bose speakers are 1 Ohm speakers. Some are 4 Ohm. You really need to check and make sure that vehicle had 4 Ohm speakers.

Now for your noise issue. https://bcae1.com/images/rca/temporaryrcashieldrepair.html

Posted By: filtercharger
Date Posted: July 05, 2009 at 4:06 PM

Thanks for the rsponse and the link to the RCA shielding!, I'm gonna try it shortly

Posted By: filtercharger
Date Posted: July 06, 2009 at 12:34 AM

I just wanted to take the time to thank you for helping me out with the noise problem I was having. The link that you sent me about grounding the outer portion of the rca took care of the problem! posted_image

you have no idea how much time and effort you have saved me!

Posted By: i am an idiot
Date Posted: July 06, 2009 at 2:50 AM

i am glad it helped you.

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