Mercedes/Bose upgrade

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=30300
Printed Date: July 15, 2025 at 7:57 AM

Topic: Mercedes/Bose upgrade

Posted By: Big Dog
Subject: Mercedes/Bose upgrade
Date Posted: April 13, 2004 at 9:54 AM

I wanted to upgrade a Mercedes C230 system by adding a sub and an amp to the OEM system with no luck.
I connected the amp high impedance input to one of the rear speakers but the BOSE system didn't appreciate the impedence and the volume would vary up and down after a short while.
Then I tried a DEI hi/lo adapter with the same results. posted_image

Anybody have luck adding an amp?

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Prepare your future. It wasn't the lack of stones that killed the stone age.

Replies:

Posted By: Greg S
Date Posted: April 13, 2004 at 10:28 AM

Try taking the input from before the stock BOSE amp, it's in the front left corner of the trunk and has speaker level inputs to it. Or you could just access the wires behind the radio, it's the same wiring as a VW except the memory and switched wires are reversed.

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Greg Stoddard

Posted By: kgerry
Date Posted: April 13, 2004 at 1:15 PM

or use a PIE Bose differential convertor to generate a preout

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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer

Owner/Installer
Classic Car Audio
since 1979

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