The Behringer NEKKST K10S Studio Subwoofer features a 10" glass-fiber woofer for rich deep and tight bass. Ideal for critical listening environments the K10S produces clean accurate bass and features a variable low pass filter and phase switch for crossover alignment with stereo monitors ensuring your music sounds its best in every acoustic environment. Designed for the ultimate in low-frequency extension the front-firing port on the K10S was designed without the typical boundary coupling and port turbulence found in other systems. Furthermore the K10S subwoofer features RCA and XLR ports ensuring seamless connection to your stereo monitors.