fromt he other thread you started-
"If you get speakers do not get sony x-plod their stuff is crap, there is better stuff out there for same price. A good set up would be component speakers, 4 channel amp, one 12 inch sub, and mono amp. If you wanna have more bass then you would need two twelves or one 15 and a cap as well.
I have alpine type r components all the way around, with mrv 540 amp, and it sounds amazing. i do not have subs, so i lack real bass cause the typre r are only meant for highs and mids not lows. I might get subs one day, but i woud rather have rims now!
Yes there is a huge difference between your head unit output and an after market one, but it does not matter because if you buy new speaker you will want to get a 4 channel amp, so the HU output does not matter. It would also be wise to get a better HU because if you do not then you will not be using the full potential of your amp/speaker because stock HU does not have RCA outputs.
If all you are worried about is hittin harder, not sound quality, get new HU, mono amp and sub."
Components are speakers with a woofer and separate tweeter that is mounted a couple feet from woofer, sound better. Do not use converts as i have said you will not get all the performance out of amp and speakers, so a new HU is recomended, even with just one sub.
I skimmed throuh your other thread and the clean sweep sounds nice, but you really should invest in a HU with rca outputs.
I would recomend infinity kappa perfects, they re real bassy, my friends got them, sounds like he had subs when he didn't, now he has two of the new type Rs and jsut sounds incredible.
Also man, please do not make two pretty much identical threads, it is a pain in the arse