Electro-Voice EKX-18SP 18-inch Powered Subwoofer single-knob user interface and backlit LCD navigation screen, you can easily manipulate its onboard QuickSmartDSP processing. Cardioid Control Technology allows you to steer signal towards the audience while simultaneously providing up to 35 dB of sound reduction on stage. An intelligent thermal management system automatically adjusts the variable-speed fan by means of built-in sensors. With two XLR outputs, you can easily integrate the EKX-18SP with additional loudspeakers and subwoofers. The subwoofer boasts large slot ports to facilitate low distortion and low-frequency extension, as well as a metal grille reinforcement bar and an M20 threaded pole-mount plate.