Im sure a search for crossovers would yeild the desired results for the other qs too
Yes, you have an amp. its in the trunk. Driver's side. behind the carpet. integeral crossovers. As far as I know, there is no way to ad power to ALL speakers without using an outboard amp and/or rewireing.
<span style='color:gray'><span style='font-family:Courier'>1995 e36 3 Series RIP
1999 e46 3 Series BURN IN HELL
2000 MR-S Roadster= Current</span></span>