{"product_id":"rcf-nd640","title":"RCF ND640","description":"\u003cstrong\u003eOverview\u003c\/strong\u003e\u003cp\u003eThe ND640 is a high performance 2.5-inch diaphragm compression driver with a 1.4 inch exit throat featuring the smallest size of the art technology. The diaphragm are precision completely formed from pure titanium. Voice coil assembly is designed using high temperature kapton former and it is joined to the diaphragm by RCF proprietary Direct Drive kapton technology. Diaphragm suspension is designed by extensive FEM study for low distortion and low frequency range extension.\u003c\/p\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003cli\u003e2.5-inch Diaphragm, 1.4-inch Exit Throat \/ Pure Titanium Compression Driver\u003c\/li\u003e \u003cli\u003e180W continuous program power handling\u003c\/li\u003e \u003cli\u003eFrequency range: 700Hz - 20kHz\u003c\/li\u003e \u003cli\u003e3-slot optimized geometry phase plug\u003c\/li\u003e \u003cli\u003eTitanium diaphragm\u003c\/li\u003e \u003cli\u003eCopper inductance ring for extended response\u003c\/li\u003e \u003cli\u003eVented, damped, low distortion suspension system\u003c\/li\u003e \u003cli\u003eNeodymium magnet assembly\u003c\/li\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003cdiv\u003e \u003cstrong\u003e General specifications \u003c\/strong\u003e \u003cdiv\u003e\u003cdiv\u003e \u003cdiv\u003e \u003cdiv\u003e \u003cdiv\u003e Exit Throat Diameter : 1.4 inch \/ 36 mm \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Related Impedance : 8 ohm \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Program Power (watt) : 180 W \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Power handling capacity : 90 W \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Sensitivity : 110 dB \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Frequency range : 700 - 20000 Hz \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Diaphragm Material : Pure Titanium \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Suspension Material : Pure Titanium \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Suspension Design : Double Roll \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Minimum Impedance (ohm) : 7.50 ohm \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Voice Coil Diameter : 2.5 inch \/ 63 mm \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Voice Coil Winding Material : Edgewound Aluminum \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Voice Coil Former Design : Direct Drive Kapton \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Number of layers : 1 \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Kind of layers : outside \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Flux Density : 1.9 T \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Phase Plug Design : 3 slot \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Phase Plug Material : Aluminum \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Magnetics : Neodymium \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Voice Coil Demodulation Ring : Copper \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e\u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cstrong\u003e Thiele - small parameters \u003c\/strong\u003e \u003cdiv\u003e \u003cdiv\u003e \u003cdiv\u003e \u003cdiv\u003e Bl factor (Bl) (T x m) : 9.80 T x m \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cstrong\u003e Mounting information \u003c\/strong\u003e \u003cdiv\u003e \u003cdiv\u003e \u003cdiv\u003e \u003cdiv\u003e Overall diameter : 102 mm \/ 4.02 inches \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Overall height : 40 mm \/ 1.57 inches \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Mounting : 4 x 6 mm threaded holes at 90° \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cstrong\u003e Standard compliance \u003c\/strong\u003e \u003cdiv\u003e \u003cdiv\u003e \u003cdiv\u003e \u003cdiv\u003e Safety agency : CE compliant \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cstrong\u003e Size \/ Weight \u003c\/strong\u003e \u003cdiv\u003e \u003cdiv\u003e \u003cdiv\u003e \u003cdiv\u003e Weight : 1.06 kg \/ 2.34 lbs \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cstrong\u003e Shipping information \u003c\/strong\u003e \u003cdiv\u003e \u003cdiv\u003e \u003cdiv\u003e \u003cdiv\u003e Package Height : 74 mm \/ 2.91 inches \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Package Width : 122 mm \/ 4.8 inches \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Package Depth : 123 mm \/ 4.84 inches \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Package Weight : 1.17 kg \/ 2.58 lbs \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e","brand":"RCF","offers":[{"title":"Default Title","offer_id":43895054729259,"sku":"RCF-ND640","price":242.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0642\/3019\/5243\/files\/15129051-1__51687.1733296295.1280.1280.jpg?v=1775701200","url":"https:\/\/www.empirepro.com\/products\/rcf-nd640","provider":"Empire Pro","version":"1.0","type":"link"}