Kicker 48CDF124 (2) Comp 12" Subwoofer in Down Firing enclosure with CXA800 amplifier and wire kit - Walmart.com
KICKER COMPRT10" Down-Firing Enclosure - AudioWorks of Delaware | Turn It On! | Car Alarms - Remote Starters - Audio Systems - Navigation Systems - Multimedia Systems - Custom Car Rims & Tires - On-site Company Fleet Services
UD-SW250D - Downfiring Enclosure for 10" Shallow Subwoofer | Pioneer Electronics USA