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
Bazooka BT1024DVC 1-Way 10in. Car Subwoofer for sale online | eBay
Disadvantages and Advantages of Large Car Subwoofers | Aftermarket Inc.