3" Sandwich voice coil Fiberglass former and Aluminium Winding PS Konex Spider with Progressive Waves DAR Cloth surround with Double Asymmetric Rolls Technology (DAR) AWpT Autoclave Waterproof Cone Treatment HeF High Excursion Ferrite Magnet Circuit Ventilated Voice Coil to reduce Power Compression 94.8 dB sensitivity Frequency Range 40-2000 Hz

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