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Old 03-28-2004, 10:36 PM   #1 (permalink)
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I have a 1998 528i and I want to put a sub amp in the trunk. Seeing that the battery is in the back I thought that the power aspect would be very easy so I am going to install it myself. I have heard that you can tap in to the factory wires and get a bass signal. Where can I get the signal for the remote amp power on and where do I tap in to get the bass signal? Also, do I need a wiring harness to convert the signal to rca?
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Old 03-28-2004, 11:04 PM   #2 (permalink)
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get an amp that can take highlevels to and then push to a sub. and tap the speaker wires for signal. thats the easy way.

the harder way involves much more messing with the amp and wiring... there is some good info here in the audio form about the 5 series and how to do some of these things or how to avoid it.

You may see if bav auto has a bass link for your ride. That would be plug-n-bump.
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Old 03-28-2004, 11:59 PM   #3 (permalink)
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Do you know what color the bass signal wire is?
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Old 03-29-2004, 11:03 AM   #4 (permalink)
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Originally posted by 007ben@Mar 29 2004, 12:44 AM
get an amp that can take highlevels to and then push to a sub. and tap the speaker wires for signal. thats the easy way.

the harder way involves much more messing with the amp and wiring... there is some good info here in the audio form about the 5 series and how to do some of these things or how to avoid it.

You may see if bav auto has a bass link for your ride. That would be plug-n-bump.
no offense, but i wouldn't recomend this set up. High level inputs are weak and low fidelity. This is what i would do...

Buy a line level converter (this changes speaker level to line level). Directions for use should be included in the package (it is pretty strait forward). Tap into the factory amp turn lead (you can use the violet wire, it will work).
You now have RCA's and a remote wire. All that is left, is to run your power wire (in trunk), find a good ground (in trunk), and hook up your sub.

...if none of this makes sense, let a professional do it. It is easy, but not extremely easy.
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