im 16 and about to get my vehicle, idk wat im getting but i know i want to have alote of nice audio/bass in it.all my friends know alote about their "headunits",subwoofers, tweeters,amplifyers and more...Only problem is i only know a little about any of this.So it would be cool and i would appreciate if you guys could help me kinda know wat does what , wats good or tips,ect.And what is a headunit (is it a cdplayer?)?what does it mean when it says its a in-dash one too. thanks guys