Thanks m5, l did not realise u had updated the pics with measurements.


I am getting some conflicting info regarding how i should create a feed to a new Amp.

If I assume that my BM54 (harman K) is amplified hence reason why I cant find an Amp in my X5.

Which of the following options should I do on the 4 wires that feed the rear speakers :-
1) Cut the 4 wires and redirect to My Alpine Amp, meaning rear stock speakers will be dead, but at least I wont kill the radio Module over time
2) Strip section of wire down and patch in a LOC to feed my Alpine Amp. This will mean rear stock Speakers still working. Wont this end up killing the radio Module due to too much ohmage draw/imbalance (i just made that word up )? . The BSW /alpac's articles seem to suggest option2.

cheers

cooa99