Originally Posted by dappamikey
What is required other than the obvious (tweeters, housings) - Will I need coding - If so, how much will it cost....Also thinking about adding an amp/sub for rear - Will there be any issues...An ICE engineer I regularly use seems to think I wont need any coding as not amping interior speakers - is this true.
Adding tweeters does not require coding. I am selling tweeters / mids and you can find details in the classified section.
Re: amp / sub
If you like the current sound of your BMW, yes you can add amp/ sub without coding. But your installer will be adding LOC.
Coding to hi-fi HU helps if you are going for alpine kit upgrade or complete aftermarket sound system.
Some use DSP or clean sweep to get clean signals from the headunit.
So it is down to personal choice which route you want to go.