BMW M5 Forum and M6 Forums - Adding Amps to DSP WITHOUT Cleansweeps

Amplifier Harness Connections - DSP / non-DSP

Posted 1st August 2009 at 10:04 PM by DouglasABaker
I get a lot of requests for the use of the various pins in the DSP and non-DSP amplifiers and radios, so I thought I would post them all here with my other reference information.

DSP Information (ALL US vehicles):
Radio Harness Pinouts - DSP.pdf
Amplifier Harness Pinouts - DSP.pdf

Non-DSP Information:
Radio Harness Pinouts - non-DSP.pdf
Amplifier Harness Pinouts - non-DSP.pdf
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Revision to Metra Wiring Harness for Pre-2002 Vehicles

Posted 18th February 2008 at 06:28 PM by DouglasABaker
It has been brought to my attention that I indicated the incorrect part number for older, round pin style radio harnesses:

The correct number is Metra 71-8590.

The number I listed (70-8590/1) will provide RCA outputs from the wiring harness, which in our case is only helpful if you put in a new head unit.


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Adding Amp to DSP FAQ

Posted 11th September 2007 at 04:39 PM by DouglasABaker
Updated 13th September 2007 at 05:50 PM by DouglasABaker (Updated for Wiring and KnuKonceptz Products)
I've had a number of questions regarding adding an amplifier to DSP systems - hopefully this FAQ will cover most questions you may have. This is a continuation of

Q. Why shouldn't I just add a Cleansweep?
Q. What are the advantages of aftermarket amplifiers over stock DSP?
Q. How much power do I need?
Q. What do I need to consider when selecting an amplifier?
Q. What are "balanced outputs"?...
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4 Channel Amp Final Installation Pics

Posted 11th September 2007 at 03:29 PM by DouglasABaker
Updated 11th September 2007 at 03:37 PM by DouglasABaker
Couple requests for more pics, so here they are. This is a continuation of

First is a picture of the final installation itself. As you can see, I left the wires a bit long. Next time I'd shorten them all up about 6 inches. No big deal since they tuck down in nicely.
Click image for larger version

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Second picture is the distribution block. All of my installation supplies came from a company called KnuKonceptz...
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Adding Amps to DSP WITHOUT Cleansweeps - Results!

Posted 8th September 2007 at 10:59 PM by DouglasABaker
Well, I finally completed the final electrical connection for the 1st amplifier, and everything is working great.

I should note that there is very slight alternator whine. Noticeable only at idle with the windows up and the radio off only, I will try to cure it by grounding the radio at the same point as the alternator (at the moment it uses the stock location) or perhaps by a ground loop isolator at a later date. It is so minimal that I'm just not worried about it.

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