SPECIFICATIONS Nominal Diameter 10''- 250 mm Rated Impedance 4 Ohm Nominal Power Handling ¹ 220 W Program Power ² 450 W Sensitivity ³ 97,5 dB Frequency Range ⁴ 80-3500 Hz Minimum Impedance - Basket Material Aluminum Magnet Material Neodymium Cone Material Doped cellulose fiber Cone Shape Exponential Surround Nomex Fabric Voice Coil Diameter 2 in - 50 mm Voice Coil Winding Material Copper Voice Coil Length 12,5 mm - 0,49 in Voice Coil Former Material Glass fiber Connection type - Ferrofluid No Magnetic Gap Height 8 mm - 0,31 in Max. Peak to Peak Excursion - Efficiency Bandwidth Product EBP 113 Recommended Loading Sealed box Volume / Tuning frequency 20 Lt (dm³)- 0,706 cuft Maximum recommended frequency - Alternative Available Version 8 Ohm NDI10.50W