15" Dual 4 ohm HCCA Series Competition SubwooferPower Handling:Peak: 5000 wattsRMS: 2500 wattsPolypropylene cone wooferRubber tri-radius symmetrical surroundDual flat conex spiders with loop stitched tinsel leadsEnhanced voice coil cooling systemsHigh temperature PAARC (Polyester Amide, Amide Resin Coated) Voice coilDual 4 ohm copper wound voice coil on aluminum formerAlso found as: HCCA15.4, HCCA-15.4, HCCA-154, and HCCA154Sensitivity: 87.4 dB