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Just replaced mine... (archive)

[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]

Posted by R Kieffer on September 16, 1999 at 20:48:02:

In Reply to: amp for E34 posted by Philip on September 16, 1999 at 10:58:58:

Philip,

Jeff is correct. The BMW sound system uses 10 different component speakers. Because each speaker only reproduces a certain range of sound, the crossovers are built into the amp. If you were to simply replace the amp and not replace the crossovers, you would probably blow most of the speakers in short order. It really is a package upgrade- amp and speakers.

I replaced my factory speakers with Polk component speakers in front, and Polk coaxial speakers in the back. I also used a Sony 4 channel amp with a built in equalizer. The sound is MUCH improved! However, I decided to use the factory wiring harness, and that got complicated. There are two 12 pin plugs that came into the back of the amp in my 1991 535i. Rather than cutting all of the wires and splicing, I bought male pin connectors and plugged those into the factory female connectors. I don't really think I'd remove the system if I were to sell the car, but I just couldn't get myself to cut the wires.

If you decide to use the factory wiring harness to put the signal into the amp and send the output to the speakers, I could provide you with a sheet that will show you what each color wire does. I would probably have to fax it to you, since I'm not sure I still have it on my computer. If you would like me to do this, send me a fax number.

Regards,

Robert J. Kieffer
1991 535i


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