Kicker Comp RT 12 Inch Thin Down Firing Enclosure Package with 46CXA4001 Amplifier and wire kit - Creative Audio
Subwoofer down firing: perché sceglierlo e come posizionarlo
TRTP Down-Firing Loaded Enclosures
Creative Pebble Plus 2.1 USB-Powered Desktop Speakers with Powerful Down- Firing Subwoofer and Far-Field Drivers, Up to 8W RMS Total Power for Computer PCs and Laptops (Black) - Newegg.com
Down-Firing vs Front-Firing Subwoofers | Klipsch
Down Firing VS Front Firing Subwoofers (What REALLY Matters!!) - YouTube