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2002 745i Adding a Sub Amp


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billfitz 
Member - Posts: 3
Member spacespace
Joined: October 12, 2002
Location: United States
Posted: January 12, 2003 at 11:24 AM / IP Logged  

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!

Velocity Motors 
Moderator - Posts: 12,488
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Fabrication. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member has been recognized as an authority in Mobile Security and Convenience. Click here for more info.spacespace
Joined: March 08, 2002
Location: Manitoba, Canada
Posted: January 12, 2003 at 12:12 PM / IP Logged  

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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