KRK S10.4

10_ Powered Subwoofer with 10_ Glass Aramid Composite Woofer, 60-90Hz Crossover Filter, Polarity Reverse, Ground Lift Switch, and Footswitch Jack. High-powered studio subwoofer that complements any set of studio monitors
10-inch glass aramid composite woofer handles high SPLs without distortion
Extensive I/O with XLR, TRS, and RCA options
Front-firing bass port and Class D amplifier
Low-profile cabinet fits comfortably into setups of all kinds
60Ð90Hz selectable crossover filter customizes sub response
Sensitivity switch for use with pro or consumer audio equipment
Ground lift and polarity switch overcome setup issues
Footswitchable bypass (footswitch sold separately)
Frequency response: 30HzÐ110Hz