they wont sound better, just keeps the outside elements away from your speaker.
92 buick lesabre
Kenwood excelon x-790
AA polys fiberglassed in the doors | LPG 25nfa, column
off brand 6x9's boxed in rear deck
rl-p 15 sealed 1000wrms @ 2 ohms =P
PA sl4-1000 4 ch
woofersetc has that same set for like $59. I've seen them in the $70 range also.
Cancel and order from there if you can.
Oh I didn't order them from where I linked from. It was just to show those who might not know what I'm talking about.