... punch with extended sub-bass output from two new, long-excursion, 18" (460mm)/4" (100mm) voice coil drivers with water ... driver, vented sub bass system,Drivers: 2x18" (460mm) / 4" (100mm) voice coil LF drivers, Frequency response: 35Hz-150Hz±3dBRated ... Power: 1000W AES, 4000W peakImpedance: 4 ohmsSensitivity: 102dB, Maximum SPL: 130 dBcontinuous, 136 dB peakConnector: ...