First Subwoofer box I ever built. $0 budget just using scraps around the shop. Boss told me not to build a box it's cheaper to buy a prefab, and I took that
TRU SPEC Prefab Dual 6.5" Ported Subwoofer Enclosure Sub Box | eBay
TRU SPEC Prefab Single 12" High Output XXL Sub Up Port Back Subwoofer Enclosure - GP Car Audio
LOADED TRU SPEC Prefab 12" Subwoofer Enclosure Box 1000 watts RMS Includes sub | eBay
TRU SPEC Prefab Single 12" Subwoofer Enclosure Sub Box Vented High Output | eBay
LAB PreFab™ 0.57 ft^3 Twin Sealed Truck-Style (Wedge) MDF Enclosure Boxes for Pair of 12" Car Subwoofers
Tru Spec Vented Prefab Dual 12" Subwoofer Enclosure for Sundown SA Series 12v2 - Walmart.com
TRU SPEC Prefab Single 8" Subwoofer Enclosure Sub Box | eBay
TRU SPEC Prefab Dual 10" Subwoofer Enclosure Sundown SA 10v2 - GP Car Audio
LAB PreFab™ 2.44 ft^3 Ported MDF Enclosure Box for Dual 12" Round Car Subwoofers
TRU SPEC Prefab Quad 8" Subwoofer Enclosure Subs Up Port Back - GP Car Audio
TRU SPEC Prefab Single 12" Subwoofer Enclosure Sundown SA 12v2
TRU SPEC Elite Prefab Single 15" Subwoofer Enclosure Sundown U 15" – Droppin HZ Car Audio
LOADED TRU SPEC Prefab 2x 12" Subwoofer Enclosure: Sundown SA 12" Classic
Upgrade Your Car Audio with Quad 10 Inch Ported Sub Box - by Down4sound
LOADED TRU SPEC Prefab 2x 6.5" Subwoofer Enclosure Sundown SA6.5