PSH-218B is composed of two 18" subwoofers with 100mm voice coil   and the woofers  are installed in a "V" shape that can perform very high efficiently .Frequency response:33Hz~250Hz (±3dB)
·Rated Maximum SPL:132dB ( peak@1m)
·Sensitivity (1 W/m):106dB
·Rated Power(RMS):1000W
·Program Power (peak):2000W
·Impedance:4 Ohm
·Driver Components:2X 18" Woofer
·Connectors:3XSpeakon –sockets(4-pin）
                      1XSpeakon –sockets(8-pin）