whats the difference between component speakers and regular ones, and ive also heard that its only makes sense to replace the front speakers, is this true? my car has 3 sets of speakers, in the front, middle, and then in the back on top of the back seats, should i replace the front speakers and the ones in the back?
The difference is that in a component speaker the woofer & tweeter are separate and have a separate crossover (not all mounted together)...component speakers sound much better than regular ones.
If you're not planning on running any amps then I would stick to replacing your speakers with regualr ones and not components.
What kind of automobile do you have? In most cases you could get away with just replacing the front & rears.
The way I see it is that if you don't plan on investing major amounts of time on insstalling your system just get coaxials as they will improve the overall sound quality in the vehicle. If you are willing to spend more time and money on your system then get comps. Either way you will be happier with them over your stock speakers.