UD-SW80D - Downfiring Enclosure for 8" Shallow Subwoofer | Pioneer Electronics USA
KICKER 48CDF104 CAR/TRUCK 10" COMP DOWN-FIRING SINGLE SUBWOOFER ENCLOSURE 4-OHM 713034021018 | eBay
Kenwood P-XRW122DB 12" Oversized Subwoofer with Sealed Down-Firing Enclosure - Creative Audio
HOW DOES IT SOUND? - Downfiring Subwoofer Build Finished! - YouTube
Kenwood P-W804B 8" Down-Firing Subwoofer in Ported Enclosure
Kenwood Excelon P-XW1241S Ported enclosure with one 12" 4-ohm subwoofer at Crutchfield
Universal Down Firing High-End Custom Hand Crafted Subwoofer Enclosure – Sounds Good Stereo Online
KICKER Down Firing 10 Inch CompVT 2 Ohm Loaded Subwoofer Enclosure, Black - Walmart.com
KICKER 48TRTP122 TRTP 12" 1000w Down Firing Subwoofer+Sub Enclosure Box+ROCKBOX - Rockville Audio
Kicker 49PTRTP10 10" Powered CompRT 400w Downfiring Car/Truck Subwoofer+Wire Kit - Rockville Audio
Kicker 49PTRTP12 12" Powered CompRT 500w Car/Truck Subwoofer System Downfiring | Reverb
Three exciting car subwoofer options
Powerbass PS-ADF110T 10 in. Amplified Down Firing Woofer Box - Walmart.com
Amazon.com: Atrend Dual Vented 12 Inch Down Firing Subwoofer Enclosure with Universal Fit - Dual Car Subwoofer Boxes & Enclosures - Made in USA Subwoofer Box Improves Audio Quality, Sound & Bass : Electronics
Kicker 48TRTP102 TRTP 10" Down Firing Subwoofer Enclosure+Amplifier+Amp Kit | eBay
Kicker 10 inch 400W RMS Thin Down Firing Car Subwoofer | Verishop
KICKER - 48trtp122KT - 12" CompRT Down-Firing Subwoofer Package
Kicker 48cdf124 Comp (2) 12" Subwoofer In Down Firing Enclosure With Pxa8001 Small Chassis Amplifier And Wire Kit : Target
DS18 EN-DF10 10" Shallow Down Firing Subwoofer Enclosure 600 Watts – Droppin HZ Car Audio
Kicker 10" Thin Down Firing Subwoofer & Passive Radiator Enclosure 48T – Installations Unlimited
KICKER - 48CVTDF122KT - 12" CompVT Down-Firing Subwoofer Package
Kicker Comp RT 10" Down Firing Subwoofer Kit with Box: TRTP102-SK
Kenwood eXcelon Subwoofer W/ Sealed Enclosure - P-XW1002B
Amazon.com: DS18 EN-DF10A 10" Amplified Thin Shallow Down-Firing Subwoofer Enclosure 500 Watts - Powered Subwoofer Box Compact Sealed Design for Car & Trucks : Electronics
