Features 3″ (63.5mm) Midrange Voice Coil Neodymium 15 Piece Radially Equalized Magnet Assembly Carbon Fiber Cone IP52 Rated Carbon fiber Cone with Treated Rubber Surround Die-cast aluminum Basket with Radial Venting Specifications Resonant Frequency (fs) 41Hz D.C. Voice Coil Resistance (Re) 3Ω Mechanical Quality Factor (Qms) 5.49 Electrical Quality Factor (Qes) 0.88 Total Quality Factor (Qts) 0.76 Compliance Equivalent Volume (Vas) 14.1L Mechanical Compliance (Cms) 0.09mm/N Nominal Impedance 4Ω
