0.25 ft @ 38Hz Ported Enclosure Box for JL Audio 6.5" W3v3 (6W3v3) Subwoofer - Walmart.com
JL Audio 6W3v3-4 W3v3 Series 6.5" 4-ohm subwoofer at Crutchfield
JL Audio Ported MicroSub Subwoofer System - CP108LG-W3v3 - Abt
Bluave X10s2s 10" X Series High Power 250w Marine Subwoofer 2-ohm Silver Grill With 10" Universal Marine Sub Box Enclosure For Cars, Trucks, Powers... : Target