RCF LF18X451, Woofer 18", 1800 Watt RMS @ 8 Ohm

Incredibly linear frequency response characteristics, the highest power handling of any comparable 18-inch transducer, the lowest power compression. The LF18X451 features a fibre loaded cone assembly along with a high excursion triple roll, constant geometry surround: this combination provides remarkable strength and a peak to peak maximum excursion of 54 mm. The new dual forced hyper-venting system guarantee a very efficient voice coil ventilation for minimum power compression and incredible power handling. A double silicon spider system ensures excellent control during large excursions. A fully optimised T-pole design generate the minimum amount of flux modulation.

Features 4,5 - inch fiberglas Inside/Outside copper voice coil 3600 Watt continuous program power handling 97 dB Sensitivity 30 Hz - 1 kHz Frequency range Dual Forced Hyperventing System Dual spider designed with silicon based damping control BL of 30.5 Txm to provide a faster and accurate low frequency

General Specifications Nominal Diameter: 460/18 mm/inch Rated Impedance: 8 Ohm Program Power: 3600 W AES Power handling capacity: 1800 W AES Sensitivity: 97 dB Frequency Range: 30 Hz ÷ 1000 Hz Effective Piston Diameter: 395 / 15.6 mm/inch Max Excursion Before Damage (peak to peak): 54/2.12 mm/inch Minimum Impedance: 6.8 Ohm Voice Coil Diameter: 115 / 4.5 mm/inch Voice Coil Material: Copper Voice Coil Winding Depth: 34 / 1.33 mm/inch Number of layers: 2 Kind of layer: inside / outside Top Plate Thickness: 15 / 0.6 mm/inch Cone Material: No presed pulp Cone Design: Straight Surround Material: Polycotton Surround Design: Triple roll

Thiele/Small Parameters Resonance frequency: 30 Hz DC resistance: 5.4 Ohm Mechanical factor: 6.7 Electrical factor: 0.29 Total factor: 0.28 BL Factor: 30.5 T · m Effective Moving Mass: 260 g Equivalent Cas air load: 220 liters Effettive piston area: 0.122 m² Max. linear excursion (mathematical): 13.5 mm Voice - coil inductance @ 1kHz: 2,9 mH Half-space efficiency: 1.90%

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: 194 / 7.63 mm/inch Volume occupied by the driver: 6.5 / 0.23 liters/ft³ Net Weight: 15.2 / 33.4 kg/lbs