MODEL: TRF SB388PRONominal diameter:101X101mmOverall Diameter:115mmNominal impedance:8ΩPower RMS:150WPower PROGRAM RMS :300WPower MAX:300WSensitivity (1w/1m):108Frequency range:4000-20000 HzVoice coil diameter:Φ 37.7 mmVoice coil wire:flatMagnet dimension:Φ89*17mm Re (D.C.):6.1ΩBasket:Die cast AlumiumVoice coil wire:CCARVoice coil bobbin:KSVMagnet: FerrityBolt circle diameter:4holes-Φ4.2 mm Φ107 mmCut out diameter: Φ 90mmDepth:58 mmNet weight:1.27 kg