what next?

[executive_power]

its time to add to my sound system and just wondering what everyone thought would be the next installment. the car currently has 4 6" speakers and head unit, but im not too keen as to a sub..... that might have to wait.

[commy92]

amp the speakers... not much more you can do without going subs.. Could always got the in car dvd or computer or something i suppose

[garfa]

what speakers are they? stock? you didnt say.
if they are aftermarket then amp them
deaden the doors
deaden the rest/whole car
then better speakers if you are still unhappy inc. better amp.
we could tell you to do a heap of stuff but we dont know how much $$ you want to invest really...