Regular Cab Build

[vanillachocolate117]

I got a new 2003 Silverado base model a little earlier this year. And now I'm starting to look ahead on where my money will be to upgrade my audio. I'm looking to build a box that goes all the way across the cab to fit two regular size subwoofers behind each seat with enough CU of air in each chamber to meet the sugguestions. This is my first build in my first car. I'm not so much going for loudness as I am for sound quality. I've added Polk Audio Dxi650's in the doors. And I'm going to add Polk Audio Dxi400s in the rear pillar location. Im looking to get Sundown Audio SA-12s. Im looking to any sub, amp, and enclosure reccomendations from you guys. Thanks.