Impedance: 8Ω Dimension: Ø 200 mm P. RMS: 80 W P. Max: 200 W SPL (1W/1m): 91 F reson.: 72 Hz F final: 6.000 Hz R (DC): 7,64 W Voice Coil: Ø 38 mm Voice Coil Mat.: KAPTON Magnet: Ø 113 mm Magnet weight: 675 g Total weight: 1.650 g Zo (Zmax at Fo): 89,22 W Sd (Piston*Area): 0,0213 sqM BL (Flux*length): 7,52 TM No (Ref Effncy): 0,465 % Qms (Mech): 13,15 Q Qes (Elec): 1,23 Q Qts (Total): 1,13 Q VAS (Ac.Vol): 15 L Cms(compl.): 240,3 M/N Mms (Total Mass): 20,01 g Mmd (Diaph. Mass): 18,22 g Added Mass Cone: 13 g