Originally Posted by semcoinc

I have installed the BMW DSP subwoofer into my E53 non-DSP vehicle.

I used the high audio input from the existing wiring on the left side rear area

My parallel wiring scheme for the two 8ohm dual voice coil DSP speakers equates to a a 2ohm load. Essentially, running all the positives together to a single positive speaker connection put into the bottom of the box and you run all the negatives to the negative post of the speaker termination. Then run the output of the mono amp to the new single speaker terminals that you have put into the bottom of the DSP box.