Is it okay to swap porsche head unit for aftermarket?

ljd your my new daily hero, if everything you mention is true it sucks!!!

I still can't understand why the alarm would be upset if you change the sound system thought, i guess they are two seperate system in the car, anyone with more comments on this?

4 ohms seems to be quite standard for car stereo, 6 and 8 are usually home entertainement systems, but i never heard of lower ohms bar on cheap stereo systems which Bose is definatelly not.