thats what i been hearing,i have 2 12s in a nice box in the trunk with a decent amp...im happy with the fronts too,and i love the 6 disc changer thing in the dash..thats the best ever...just cant take the rears rattling and popping cause theyre blown,thats the whole reason behind this was to get rid of the blown speakers. actually thought about just cutting the wires to them... but figured wat the hell,might as well do it right. ive been in many cars with "premium" sound and i have to say that this set up factory is not that bad for what it is...but i also dont know how much the upgrade was to have it? that might change my mind..