Energy ESW-M8 1200 Watt Mini Subwoofer (Black) 8-Inch Aluminum woofer and dual 8-Inch Aluminum Passive woofers Patented Ribbed Elliptical surround suspensions for greater output & lower distortion 1200 watt Dynamic custom matched amplifier for clean and deep bass down to 42hz Rigid, low-distortion MDF enclosure with High Gloss piano black lacquer finish Variable Crossover and Phase Control to blend with any speakers Front-firing, down-ported design for maximum impact and reduced port turbulence & distortion