{"product_id":"rcf-lf18x401","title":"RCF LF18X401","description":"\u003cstrong\u003eOverview\u003c\/strong\u003e\u003cp\u003eVery linear frequency response characteristics, extreme high power handling while generating the lowest harmonic distortion of any comparable 18-inch transducer within its application range. The LF18X401 uses a fibre loaded cone assembly along with a high excursion triple roll surround. This combination provides remarkable strength and a peak to peak maximum excursion of 50 mm. The new dual forced hyper-venting system guarantee a very efficient voice coil ventilation for minimum power compression and incredible power handling.\u003c\/p\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003cli\u003e4-inch, fiberglass inside\/outside copper voice coil\u003c\/li\u003e \u003cli\u003e3000W continuous program power handling\u003c\/li\u003e \u003cli\u003e97.5 dB Sensitivity\u003c\/li\u003e \u003cli\u003e25 Hz – 1 kHz Frequency range\u003c\/li\u003e \u003cli\u003eDual Forced Hyperventing System\u003c\/li\u003e \u003cli\u003eDual spider design with silicon based dampening control\u003c\/li\u003e \u003cli\u003eTriple-roll surround and corrugated straight cone geometry\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 Nominal Diameter : 18 inch \/ 457 mm \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Rated Impedance : 8 ohm \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Program Power (watt) : 3000 W \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Power handling capacity : 1500 W \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Sensitivity : 97.5 dB \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Frequency range : 25 - 1000 Hz \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Effective piston diameter : 395 mm \/ 15.55 inch \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Max. Excursion Before Damage : 50 mm \/ 1.97 inch \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Minimum Impedance (ohm) : 6.5 ohm \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Voice Coil Diameter : 4.0 inch \/ 102 mm \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Voice Coil Winding Material : Copper \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Voice Coil Length : 30 mm \/ 1.18 inch \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Number of layers : 2 \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Kind of layers : inside\/outside \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Top Plate Thickness : 15 mm \/ 0.59 inch \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Cone Design : Straight \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Surround Material : Polycotton \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Surround Design : Triple roll \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Magnets : Ceramic \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Dual-force air ventilation : Yes \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Spider : 03 \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 Resonance frequency (Fs) : 30 Hz \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e DC resistance (Re) (ohm) : 5.40 ohm \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Mechanical factor : 7.40 Qms \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Electrical factor : 0.31 Qes \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Total factor : 0.30 Qts \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Bl factor (Bl) (T x m) : 26.50 T x m \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Effective moving mass (Mms) : 215.0 g \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Equivalent Cas air loaded (Vas) : 274.0 liters \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Effective piston area (Sd) : 0.120 m2 \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Max. linear excursion (Xmax) : 12 mm \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Voice coil inductance @ 1kHz (Le1k) : 0.83 mH \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Half-space efficency (Eff) : 2.30% \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 : 465 mm \/ 18.31 inches \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Bolt circle diameter : 442-447 mm \/ 17.4-17.6 inch \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Bolt hole diameter : 7 mm \/ 0.28 inch \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Front mount baffle cut-out : 424 mm \/ 16.69 inch \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Rear mount baffle cut-out : 425 mm \/ 16.73 inch \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Volume occupied by the driver : 6.5 liters \/ 0.26 ft3 \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 Height : 196 mm \/ 7.72 inches \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Diameter : 465 mm \/ 18.31 inches \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Weight : 12.5 kg \/ 27.56 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 : 254 mm \/ 10 inches \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Package Width : 524 mm \/ 20.63 inches \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Package Depth : 494 mm \/ 19.45 inches \u003c\/div\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e Package Weight : 15 kg \/ 33.07 lbs \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e","brand":"RCF","offers":[{"title":"Default Title","offer_id":43895052795947,"sku":"RCF-LF18X401","price":433.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0642\/3019\/5243\/files\/1__10351.1733300270.1280.1280.png?v=1775701190","url":"https:\/\/www.empirepro.com\/products\/rcf-lf18x401","provider":"Empire Pro","version":"1.0","type":"link"}