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2002 745i Adding a Sub Amp

Printed From: the12volt.com
Forum Name: Vehicle Wiring Information & File Requests
Forum Discription: Request Car Alarm, Car Stereo, Cruise Control, Remote Starter, Navigation, Mobile Video, and Other Vehicle Specific Wiring Info, Manuals, Tech Tips
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=8028
Printed Date: May 14, 2025 at 5:53 PM


Topic: 2002 745i Adding a Sub Amp

Posted By: billfitz
Subject: 2002 745i Adding a Sub Amp
Date Posted: January 12, 2003 at 11:24 AM

I am working on a 2002 BMW 745i adding a sub amp and subs to the factory system.

I am looking for a full-range non-filtered, non-crossed-over signal source to feed the sub amp for optimal music.  I have located signal source from the amp in the rear trunk, but it seems to be filtered or crossed over.

This is a Becker Logic 7 system with one Becker amp located behind the driver rear wheel well in the trunk.  The connector on the amp has a ground, +12V, Rear Left Speaker +/-, Rear Right Speaker +/-, an unbalanced front speaker +/-, and two other pairs which are 5V but don't seem to have any signal on them (not sure what these are yet).

Thanks!




Replies:

Posted By: Velocity Motors
Date Posted: January 12, 2003 at 12:12 PM

You will have to grab the speaker outputs from the back of the deck to get a non crossed over signal to the sub amp or use the input sires into the OEM amp. Run new wires from the back of the deck/amp to the amplifier ( if it has high level inputs ) and if not use a LOC.



-------------
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA


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