You need for vehicles without additional original amplifier (SA676 or RAM) the BAK (BMW connection cable). Thus, the stereo front signal is tapped directly at the under-seat basses and led to the retrofit amplifier. No cables need to be cut off.
You need for vehicles without additional original amplifier (SA676 or RAM) the BAK (BMW connection cable). Thus, the stereo front signal is tapped directly at the under-seat basses and led to the retrofit amplifier. No cables need to be cut off.
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