GVX-SUB18P Powered 18" Subwoofer 500W rms 2000W peak 18" woofer w/ 3" (76.2 mm) voice coil and 62oz magnet Built in amp with limiter circuit Perforated steel mesh grille Recessed flush handles Water resistant textured black paint Balanced XLR/ 1/4" (6.35 mm) combo Input Balanced XLR Full range Output and High Pass output Electronic crossover w Adjustable frequency control (55Hz ~ 200Hz) Linear frequency response between 37Hz - 250Hz Phase inverter switch 35mm Pole mount fitting