this is the system i have.The third flavour of M5 stereo available has no DSP and is not M-Audio, like was originally fitted in my car. I believe is wasn't available in the US but was the standard sytem in the UK, with DSP / M Audio as a cost option. It has no sub woofers, just front and rear speakers.
The front speakers are 5.25" woofers in the doors (as doug says, you can get 6.5" speakers in there with some work), a mid range above that and a tweeter at the top near the window. If you take out the mid range it leaves a gap which is perfectly sized for some component speaker treble units - the Focal units I used just popped straight in. I junked the stock tweeter units.
In case you are not aware the speaker level outputs from the stock amplifier are already filtered for the different driver units; they are not full-range.:cheers:
That may be a good idea; M5s are not straight forward. Like many things, once you've done it and really know what you are doing, it seems much easier. First time round it can be a nightmare.:1zhelp: At least if it does go wrong, it isn't all on your shoulders. Out of interest, which company is it that is doing the install?i was put intouch with a very good car audio company today so ive decided to hand over the whole project to them. i was thinking about tackling this with a friend but quickly realised we're way out of our depth.