i just spent 3 hours installing 2 sets of Polk db650 speakers in my Sedan... only to be so dissapointed in their performance off of the stock deck that i swapped the stocks back in

. the stocks had a LOT deeper bass and just overall volume than the Polks. the Polks had a bit better highs obviously, but i guess if i wanna replace the factory speakers i'm going to prolly wanna get an amp for 'em :-/
ah well, at least i know how to replace the speakers like a champ now

. honestly the rear ones i had the polks out and originals back in in about 15 minutes flat the 2nd time around.
sadly i had to drill 3 holes in my passenger side door to mount the polks, not that big of deal, can reuse them if i ever do replace my stocks i guess.