MODEL: TRF 5 MR180ND Nominal diameter:5inch Nominal impedance:4Ω Power RMS:100W Power PROGRAM RMS :180W Power MAX:200W Sensitivity (1w/1m):95 Frequency range:150-13500 Hz Voice coil diameter:Φ38.55 mm Magnet dimension:Φ75*6mmX1PCS Vas:2.35l Fs:149 Hz Qms: 4.39 Qes: 0.56 Qts: 0.5 Sd: 96.7cm2 Mmms:6.44g Bl:5.84Tm Re (D.C.):3.2Ω Basket:Die cast IRON Cone and dust cap:Paper Surround:Cloth Voice coil wire:CCAR Voice coil bobbin:KSV Magnet: ND Over all diameter:Φ151mm Bolt circle diameter:4holes-Φ5mm - Φ135.5 mm Cut out diameter:Φ121 mm Depth:58 mm Net weight: 0.800 kg Xmax:± 3mm