Incar Audio Systems

I have been searching the net for information over car audio systems only to have every site contradict the other about the "right" way to do a car audio set up

I have an alpine pdx 1.1000 amp with two alpine type r 10′ subs

Some sites claim you need a new alternator, others claim adding batteries or capacitors–I want to choose the right route with my car audio system without having to waste hard earned money on things I don’t need.

any suggestions?

I have an Alpine IVA-W200 in my car along with a complete Alpine Type-R setup (12′ Sub in the rear). I was wondering what the Bass Center Frequency setting does and what would be a good setting for the best bass / audio.

I have a surround sound system that has a six inch sub. I want to take that one out and install an Alpine Type R 10" sub into it. Im not big on audio stuff, so I was just wondering if I am able to put a car audio sub into a surround sound sub? Also do you think it will mess up my surround sound system if i changed the six inch sub to a ten inch?? Thanks.