over 199 € gratis (inden for Danmark)
Incredibly 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 LF18X400 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 reaches its maximum excursion limits. Forced air venting system.
Features 4-inch, fiberglass inside/outside copper voice coil 2000W continuous program power handling 97.5 dB Sensitivity 25 Hz – 1 kHz Frequency range Progressive, spaced, aluminum demodulation rings Forced air ventilation and 14 mm top plate for minimum power compression Dual spider design with silicon based dampening control Triple roll surround and corrugated straight cone geometry
General Specifications Nominal Diameter: 460 / 18 mm/inch Rated Impedance: 8 Ohm 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: 6.0 Ohm 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: 14/0.55 mm/inch Cone Material: No pressed pulp Cone Design: Straight Surround Material: Polycotton Surround Design: Triple roll
Thiele/Small Parameters Resonance frequency: 28 Hz DC resistance: 5.1 Ohm Mechanical factor: 6.5 Electrical factor: 0.29 Total factor: 0.27 BL Factor: 25 T · m Effective Moving Mass: 192 g Equivalent Cas air load: 340 liters Effettive piston area: 0.122 m² Max. linear excursion (mathematical): 9.0 mm Voice - coil inductance @ 1kHz: 2.3 mH Half-space efficiency: 2.64%
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 Mount Baffle Cut-out: 424 / 16.7 mm/inch Rear Mount Baffle Cut-out: 424 / 16.7 mm/inch Depth: 210/8.3 mm/inch Volume occupied by the driver: 7.0/0.25 liters/ft³ Net Weight: 13.3 / 29.3 kg/lbs
Tillykke til vinderen af august: Etienne Laget, Vaires sur Marne (FR)
Forrige måneds vinder (juli): Wim Rutjens, Tegelen (NL)