* 1400 W continuous program power capacity * 97dB Sensitivity 1w/1m * 37Hz ~1800Hz frequency response range * 4" inside/outside voice coil with OFC(Oxygen-free Copper) wire for improved power-handling and durability * Optimized winding length for extended Xmax * Forced air ventilation and 14mm top plate for minimum power compression * Ideal for compact bass-reflex subwoofer application: 1. Nominal Diameter: 18 inch 2.Rated Impedance: 8 ohm 3.Nominal Power handling: 700 watts 4.Program Power: 1400 watts 5.Sensitivity(lw/lm): 97 db 6.Frequency Range 37-1.8 k hz 7.Minimum Impedance(Zmin) : 6.9 ohm 8.Voice Coil Diameter : 4 inch. 13 net weight.