18-in next generation high performance subwoofer, specifically designed for high SPL very low frequency applications in either a reflex, bandpass or horn loaded configuration - Walmart.com
12" SUBWOOFER 600WMAX – GENIUS AUDIO USA
Alpine Two R2-W10D2 Next-Gen 10" R-Series Subwoofers Dual 2-Ohm with Two KTE-10G.3 Grill - Creative Audio
woofer /subwoofer Next | eBay
NEXT-proaudio Launches New LAs418 - LightSoundJournal.com
NEXT-proaudio Types
Power Acoustik Exclusive GW-124 12-inch Subwoofer | 2,500W Max | Gothic Series - Walmart.com