18 in., 2268H Differential Drive? woofer for extended low-frequency output.
Large port area for reduced distortion.
20 mm threaded pole socket for solid, secure satellite speaker mounting.
Power Rating:800 W / 1600 W / 3200 W
Frequency Range:31 Hz - 220 Hz (-10 dB)
Dimensions
(H x W x D): 508 mm x 597 mm x 749 mm 
Frequency Respons: 34 Hz - 220 Hz (±3 dB)
Net Weight:36 kg