Hi guys..

Couple of questions if i may, any advice much appreciated.

I have a 2003 E46 coupe, stock sat nav head unit, firstly ive changed the speakers in the back as they were poor but still only 5" so no base at all, would i be able to add an active sub into the boot just from that head unit, would it work ok?

Secondly, the radio works very well other than every now and then the volume seems to change, i can have it fairly loud and it will suddenly drop down, its noticeable and then possibly go back up again, any ideas why?

Third and final question is about playing cd's.. radio is fine but when i put a cd in, most of them time there is a kind of crackling, it does go away but most of the time its there, any ideas?

Thanks people..