i wanted to put a nice starter system in my sisters 2004 exterra but she doesnt want all the amps and subs and stuff. so, my only option is coaxil and cd player- thats it. i dont have any experience with coaxils. do thay make coaxils with good bass? i know in stock cars the factory speakers are designed to play low bass, midbass, and highs all in one speaker. do they make a coaxil that has low bass and good midbass out there?