RCF L18P400 Woofer

Incredibly linear frequency response characteristics, extreme high power handling while generating the lowest harmonic distortion of any comparable 18-inch trasducer wtihin its application range. The 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. Features4-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 geometrySpecificationsNominal Diameter: 460 / 18 mm/inchRated Impedance: 8 ΩProgram Power: 2000 W AESPower handling capacity: 1000 W AESSensitivity: 97.5 dBFrequency Range: 25 Hz Ã?· 1000 HzEffective Piston Diameter: 395 / 15.6 mm/inchMax Excursion Before Damage (peak to peak): 50 / 2.0 mm/inchMinimum Impedance: 6.5 ΩVoice Coil Diameter: 100 / 4 mm/inchVoice Coil Material: CopperVoice Coil Winding Depth: 25 / 1.0 mm/inchNumber of layers: 2Kind of layer: inside / outsideTop Plate Thickness: 15 / 0.6 mm/inchCone Material: No pressed pulpCone Design: StraightSurround Material: PolycottonSurround Design: Triple rollResonance frequency: 29 HzDC resistance: 5.1ΩMechanical factor: 7.6Electrical factor: 0.29Total factor: 0.28BL Factor: 24.6 T Ã?· mEffective Moving Mass: 200 gEquivalent Cas air load: 340 litersEffettive piston area: 0.122 mÃ?²Max. linear excursion (mathematical): 8.8 mmVoice - coil inductance @ 1kHz: 2.5 mHHalf-space efficiency: 2.63%Overall Diameter: 465 / 18.3 mm/inchBolt Circle Diameter: 442-447 / 17.4-17.6 mm/inchBolt Hole Diameter: 6.5 / 0.25 mm/inchFront Mount Baffle Cut-out: 424 / 16.7 mm/inchRear Mount Baffle Cut-out: 424 / 16.7 mm/inchDepth: 205 / 8.1 mm/inchVolume occupied by the driver: 6.0 / 0.21 liters/ftÃ?³Net Weight: 13.3 / 29.3 kg/lbs