KRK 12s 225 Watts 12-Inch Powered Studio Subwoofer Curved baffle design virtually eliminates diffraction distortion Low distortion 225-watt amplifier Front-firing port provides low frequency extension while reducing boundary coupling and the unique shape is optimized to avoid port turbulence Bypass footswitch control allows you to defeat the sub and provide full range audio to your recording monitors for use with a standard latching 1/4 inch mono footswitch Kevlar 12-Inch driver, high excursion woven Kevlar driver cone