Accessories 4 x Heavy Duty 100mm PU Castors (included in the box) System Type Dual 18" Active Subwoofer, Direct Radiating, Bass Reflex Frequency Response (-10) 32Hz – 100Hz Frequency Response (-3) 37Hz – 100Hz LF Driver 2 x 18-inch High sensitivity HH designed driver. 4-inch Voice Coil Max SPL 144 dB Crossover Frequency Active – 70Hz to full range Power 8000W Peak, 4000W Continuous, 2000W RMS Input Sensitivity 0dBu to +10dBu Adjustable Input Connector Balanced Female XLR Unit Dimensions (Hwd) 562 x 1080 x 685mm, (22.1" x 42.5" x 27") Unit Weight 77.7Kg, 171 lbs