Just wanted to post a thank you to everyone. I just got done with my build. Before this i always had the basic box in trunk, 800-1000 watts and componets in the doors. This is my first complex and powerful build. Two 15'' Sundown ZV5's in a B-pillar wall on a RF 4k, First time working with fiberglass much less building custom fiberglass door panels which house a 3-way active front stage using a RF360.3, 8'' Silver flute midbass on a RF6002, a pair of 6.5'' Silver flute midranges on a RF4004 and, a pair of Peerless Tymphany ring radiator tweeters on a RF4004. XS power batteries, Singer alt, Sky High wiring etc. All in my poor little altima. I'm sure there are many that could pick a part this system but, i love it. It is a build geared toward daily music. It sounds fantastic and the bass is incredible!! I couldn't be happier!! I spent over a year on caraudio.com learning so thank you to everyone that helped me either directly or indirectly!!