Scan-Speak Classic D2010/852100 20mm Dome Tweeter 8ohm, Cell rubber damping front, Neodynium magnet After almost 5 decades of service the highly praised D2010/851100 were upgraded to D2010/852100 with modern materials and to new manufacturing standards, still maintaining its excellent performance as wide dispersion, smooth frequency response and natural sound character. - 3/4" Textile Dome Diaphragm - Wide Dispersion - Diffraction Damping Cell Rubber Front - Dual Rear Chamber - Vented Pole Piece