Atrend BBox Series Subwoofer Box for GM Vehicles (12" Dual Downfire) in the Mobile Audio department at Lowes.com
Down-Firing vs Front-Firing Subwoofers | Klipsch
KICKER TRTP82 Subwoofer Down-Firing 8"
Amazon.com: ALPHASONIK AS10DF 10 inch 1200 Watts 4-Ohm Down Fire Shallow Mount Flat Enclosed Sub woofer for Tight Spaces in Cars and Trucks, Slim Thin Loaded Subwoofer Air Tight Sealed Bass Enclosure :
Front- and down-firing subwoofers -- Teufel Audio blog
HOW DOES IT SOUND? - Downfiring Subwoofer Build Finished! - YouTube
Acoustic Audio by Goldwood Home Theater Powered 12 in. Subwoofer Black Down Firing Sub PSW12 - The Home Depot
Subwoofer T 10 | Teufel
Down Firing VS Front Firing Subwoofers (What REALLY Matters!!) - YouTube
Diferencia entre los subwoofers frontfire y downfire | Blog de Teufel
Amazon.com: Bbox 10AME 10-Inch Single Sealed Shallow Mount Downfire Enclosure : Electronics
Front- und Downfire Subwoofer vorgestellt | Teufel Blog