3) BOSS P126DVC 12" 6900W DVC 4 Ohm Subwoofers + QCM12 Triple Sealed Sub Box - Walmart.com
Q POWER Car Audio Subwoofer Box Chuchero For 10 in. Mids and 3 in. Tweeters (2-Pack) 2 x CH103S - The Home Depot
Sealed / Recessed Sub Box Enclosure for 3 10" JL Audio 10TW3 TW3 Subwoofers | eBay
Amazon.com: QPower 8 inches Quad Port Subwoofer Enclosure Box, with Underseat Frontfire for Ford F150, Super Crew and 250 350 Super Duty Trucks : Electronics