Features 2.4″ (61.1mm) 8 Layer Voice Coil Weather Rated IMPP Cone with Rubber Surround Small Enclosure Optimization Y-35 Ferrite Oxide Magnet Anti-resonant stamped steel basket with radial venting Poly Cotton Linear dampeners Compression Speaker Terminals Specifications DX-W10F Resonant Frequency (fs): 42.756 Hz Mechanical Quality Factor (Qms): 3.810 Electrical Quality Factor (Qes): 1.043 Total Quality Factor (Qts): 0.819 Equivalent Air Volume (Vas): 22.091 L Mechanical Compliance of Suspension