RCF L18P400 - 18", 1000 W RMS, 2000 W program, 4" coil, Woofer - $457 - (New York, NY)
The RCF L18P400 uses a fibre loaded cone assembly along with a high excursion triple roll,constant geometry surround. A fully optimised T-pole design generate the minimum amount of flux modulation. The T-pole also features RCf Precision's spaced gap demodulation technology, progressively braking the voice coil, providing a much smoother transition for the moving mass as it reachees its maximum excursion limits.Forced air venting system. RCF L18P400 Features:4-inch, fiberglass inside/outside copper voice coil2000W continuous program power handling97.5 dB Sensitivity25 Hz – 1 kHz Frequency rangeAluminum demodulation ringForced air ventilation and 15mm top plate for minimum power compressionDual spider design with silicon based dampening controlTriple roll surround and corrugated straight cone geometry RCF L18P400 Specifications: General Specifications Nominal Diameter: 460 / 18 mm/inch Rated Impedance: 8 Program Power: 2000 W AES Power handling capacity: 1000 W AES Sensitivity: 97.5 dB Frequency Range: 25 Hz ÷ 1000 Hz Effective Piston Diameter: 395 / 15.6 mm/inch Max Excursion Before Damage (peak to peak): 50 / 2.0 mm/inch Minimum Impedance: 6.5 Voice Coil Diameter: 100 / 4 mm/inch Voice Coil Material: Copper Voice Coil Winding Depth: 25 / 1.0 mm/inch Number of layers: 2 Kind of layer: inside / outside Top Plate Thickness: 15 / 0.6 mm/inch Cone Material: No pressed pulp Cone Design: Straight Surround Material: Polycotton Surround Design: Triple roll Thiele/Small Parameters Resonance frequency: 29 Hz DC resistance: 5.1 Mechanical factor: 7.6 Electrical factor: 0.29 Total factor: 0.28 BL Factor: 24.6 T · m Effective Moving Mass: 200 g Equivalent Cas air load: 340 liters Effettive piston area: 0.122 m² Max. linear excursion (mathematical): 8.8 mm Voice - coil inductance @ 1kHz: 2.5 mH Half-space efficiency: 2.63% Mounting information Overall Diameter: 465 / 18.3 mm/inch Bolt Circle Diameter: 442-447 / 17.4-17.6 mm/inch Bolt Hole Diameter: 6.5 / 0.25 mm/inch Front…
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From ebay.com - 1 month ago