Product Description Pro Series 10 SpeakerPRO 10 Impedance: 8 Ohms Power capacity: 800 W Peak 400 W Program 200 W Continuous Sensitivity: 94.3 dB / 1 W 1 m Usable freq. range: 50 Hz ~ 4 kHz Cone: Kevlar® impregnated cellulose Voice coil diameter: 2.5" / 63.5 mm Voice coil material: 2 layers, thermally bonded copper wire, Kapton® former, Nomex® stiffener Net weight lb. / kg: 9.5 lbs. / 4.3 kg Znom (ohms) 8 Revc (ohms) 6.00 Sd (Square Meters) 0.035 BL (T/M) 14.33 Fo (Hz) 67.7 Vas (liters) 25.1 Cms (uM/N) 150.0 Mms (gm) 36.90 Qms 2.85 Qes 0.456 Qts 0.395 Xmax 2.5 Le (mH) 0.72 SPL (1W 1m) 94.3 No (%) 1.70% Vd (cu. in. / ml) 10.6 / 173 Pmax (Watts pgm.) 400 Disp (cu. in. / ml) 95 / 1564 10" Weight Unpacked: 9.26 lb(4.2 kg) Weight Packed: 11.02 lb(5 kg) Width Packed: 11.125"(28.2575 cm) Height Packed: 12.125"(30.7975 cm) Depth Packed: 6.325"(16.0655 cm)