ok i just bought a pair of 6" jl audio evolution speakers from my friend for 20 bucks that are practicly new. well anyway i put them in the front and screwed them in just 2 holes. There is a big gap on the side because obviously they arent 6x8. Do i need to fill that hole to make it sound better or does it even matter? Also im going to get a pair of 5x7 jl audio evolutions as soon as i get money. should i put those in front and put the 6" in back or should i keep the 6" in front and put the 5x7 in rear? I am also buying my friends jl audio 150 amp 2 channels in a bit. I think im going to hook it up to the front speakers so i get a better sound up there. what do you think? Also, i have a 10" kicker comp vr in the trunk with a kicker 400.1 amp.