This is the Mitsubishi Dialtone D160, the largest subwoofer ever, constructed in the 80's. It weights 800kg, it can easily break windows and it produces small earthquakes which can be felt as
Deaf Bonce DB-832 NEO | 32 inch Subwoofer
Differences In Subwoofer Sizes - Sonic Electronix Learning Center and Blog
Amazon.com: UTV Stereo RZR 10" Vented Sub Enclosure - Biggest Subwoofer Enclosure 9.5" Mounting Depth - Polaris RZR (Not for Pro XP Models) : Electronics