Replacement 15" subwoofer for Peavey speakers. SpecificationsImpedance: 8 OhmsPower capacity: 2400 W Peak 1200 W Program 600 W ContinuousSensitivity: 96.3 dBUsable freq. range: 35 Hz ~ 2 kHzCone: Kevlar® impregnated celluloseVoice coil diameter: 4.0" / 100 mmVoice coil material: Aluminum ribbon wire Polyimide-impregnated fiberglass former Nomex® stiffener Solderless diffusion welded OFHC copper leadsNet weight lb. / kg: 18 lbs. / 8.2 kgZnom (ohms) 8Revc (ohms) 5.8Sd (Square Meters) 0.084BL (T/M) 16.5Fo (Hz) 40.4Vas (liters) 188.2Cms (uM/N) 187.8Mms (gm) 82.5Qms 8.726Qes 0.45Qts 0.428Xmax (mm) 4.6Le (mH) 0.41SPL (1W 1m) 96.3No (%) 2.7%Vd (cu. in. / ml) 47.1 / 773Pmax (Watts pgm.) 1200Disp (cu. in. / ml) 209 / 3426Weight Unpacked: 17.00 lbs (7.711 kg)Weight Packed: 19.00 lbs (8.618 kg)Width Packed: 16" (40.64 cm)Depth Packed: 16.5" (41.91 cm)Height Packed: 7.5" (19.05 cm)