325 Watts RMS and 820+ Watts Peak Power Sledge STA-325D Amplifier combines massive high current output of discrete MOSFETs with Class D efficiency. Boasting vanishingly low distortion the unique design unleashes nearly limitless on-demand power while maintaining driver control High-Excursion 12-inch SVS Subwoofer Driver features dual ferrite magnet motor assembly with long-throw parabolic surround for extreme excursion that delivers massive output with finesse and accuracy even at the most intense listening levels 50MHz Analog Devices Audio DSP renders pinpoint accurate frequency response through advanced in-room tuning and powerful controls while letting the subwoofer take control of a space with room-filling bass Groundbreaking SVS Subwoofer DSP Smartphone App is the easiest way ever to control volume manage custom presets and fine tune performance in your system Acoustically Inert and Rigidly Braced Sealed Subwoofer Cabinet features extra-thick MDF front baffle and rigid internal bracing to create a resonance-free environment for uncompromised performance. Compact enough to fit in nearly any room or system