Dayton Audio 18" Ultimax DIY Home Theater Subwoofer Kit with 4 Cu Ft Cabinet Package 1000 Watts
GSG Audio Design - Elite Subwoofers
DIY Subwoofer first build 2 18's | Home Theater Forum and Systems
EASY TO DIY 18 Inch Subwoofer BOX Plan 35Hz Tuned - YouTube
Dayton Audio 18" Ultimax DIY Home Theater Subwoofer Kit with 4 Cu Ft Cabinet Package 1000 Watts
Reviews of DIY Subwoofers? | Home Theater Forum
Amazon.com: 5 CORE 10" inch Full Range Bass Woofer Car Audio Speakers High Power Bass Woofer Peak 600W 4 Ohm Vehicle Audio Full Range Drivers, Wide Range DIY Loudspeaker Replacement SP-1090 : Electronics
So I built an 18" sealed subwoofer. Build guide and bonus picture in album! More info in comments. (X-post from r/DIY) : r/hometheater
Scoop 18 Subwoofer Cabinet Build KIT - Celestion
DIY 15" Subwoofers based on DIYSG Buyout 15 aka Lab 15 pair | AVS Forum