Kenwood Excelon P-XW1221D Ported 2-ohm enclosure with two 12" subwoofers at Crutchfield
8" Subwoofer Install - Ported Downward Firing DIY Enclosure | 2016+ Honda Civic Forum (10th Gen) - Type R Forum, Si Forum - CivicX.com
DD Audio - Down-firing ported enclosure for a pontoon boat... | Facebook
Chevy Tahoe Custom Enclosure - Custom down firing box on a Chevy Tahoe
Down-Firing Loaded Sub Box - CompRT8 | KICKER®
Pluto + subwoofer
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
BIG BASS small space! - Downfiring PORTED Subwoofer Box! - YouTube | Subwoofer box design, Car subwoofer box, Subwoofer box
Universal Down Firing High-End Custom Hand Crafted Subwoofer Enclosure – Sounds Good Stereo Online
Build a Subwoofer Test Box - BETTER BASS - CarAudioFabrication - YouTube
HOW DOES IT SOUND? - Downfiring Subwoofer Build Finished! - YouTube
PS-DF110T 10" Downfiring Enclosure
2) Skar Audio VXF 15s Ported Subwoofer Box Plans – CarstereoFX
PS-ADF110T 10" Amplified Downfiring Enclosure
Pyle 10'' Active Down-Firing Subwoofer- Ported Design w/ High-to-Low Input level | eBay
Front- and down-firing subwoofers -- Teufel Audio blog
Building a Downfiring Subwoofer Box - Stacked Corners! - YouTube
Finished my down-firing subwoofer enclosure for two 10's : r/CarAV
Down Firing Subwoofer Box Design - YouTube
UD-SW80D - Downfiring Enclosure for 8" Shallow Subwoofer | Pioneer Electronics USA
BIG BASS small space! - Downfiring PORTED Subwoofer Box!
UD-SW300D - Downfiring Enclosure for 12" Shallow Subwoofers - Accessory | Pioneer Electronics USA
Down-Firing Loaded Sub Box - CompRT12 | KICKER®
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
Universal Down Firing High-End Custom Hand Crafted Subwoofer Enclosure – Sounds Good Stereo Online
