[stanger66]

well when you do replace everything you should put 6 1/2 separates in front (6 1/2 on door and tweeters where 3 1/2 in speakers go. Back panels should take 6x8 or 6x9 in speakers) and to get a feel on what to buy talk to your students about what to buy (if they are into cars yet and old enough to know anything) amps, subs, etc.