SR4718A:
460 mm (18") Subwoofer/Bass System

The ideal complement to the SR4722A, SR4725A or SR4735A systems.

Frequency Range: 30 Hz - 3.3 kHz (-10 dB)
Power Capacity: 600 Watts (Continuous Pink Noise 50 Hz-5 kHz with a crest factor of 6 dB)
Sensitivity: 98 dB (1W @ 1m)
Nominal Impedance: 4 Ohms
Components: LF Driver: 2241G
Dimensions (HxWxD): 1092 x 635 x 460 mm (43 x 25 x 18 in)
Weight: 39.5 kg (87 lb)
Biamp Operation: Recommended Crossover Frequency: 80 Hz - 100 Hz