Impedance: 8 OhmDimension: Ø 250 mmP. RMS: 80 WP. Max: 200 WSPL (1W/1m): 91F reson.: 43 HzF final: 4.500 HzR (DC): 7,75 OhmVoice Coil: Ø 25 mmVoice Coil Mat.: AlumMagnet: Ø 113 mmMagnet weight: 675 gTotal weight: 2.000 gZo (Zmax at Fo): 36,18 OhmSd (Piston*Area): 0,03 sqMBL (Flux*length): 7,85 TMNo (Ref Effncy): 0,49 %Qms (Mech): 3,72 QQes (Elec): 1,01 QQts (Total): 0,79 QVAS (Ac.Vol): 65,84 LCms(compl.): 460,11 M/NMms (Total Mass): 29,90 gMmd (Diaph. Mass): 26,65 gAdded Mass Cone: 26 g