The all new ATC-400, Amplified Terminal Cup, is a highly versatile half bridge, high speed, class D amplifier made to serve either low end bass or full range applications by transforming the terminal cup position of your enclosure from passive to powered with next generation technology to easily produce over 325 Watts from a tiny unit while managing internal temperatures. The size and convenience make this an exceptional choice for pro audio builds inside the vehicle and out when paired with VO Series speakers. The smooth mids and highs in a party box running on full range mode combined with the rich bass of larger woofers in an enclosure on sub mode are the makings for a full-on, portable DJ system made to get loud and sound good.