MTX AUDIO | JH300 JackHammer Class D Subwoofer 600 Watt Amplifier - Auto Gadgets by Seng Hoe Huat | Brunei's Largest Retailer for Car Accessories, Gadgets and more
MTX JH Jackhammer Standard Car Subwoofer Archive | MTX Audio - Serious About Sound®
Just in case some of you wondered what a MTX Jackhammer looks like... ($15000 price tag) : r/CarAV