RCF - LF18N401 - High power 18'' Woofer

Incredibly linear frequency response characteristics, the highest power handling of any comparable 18-inch neodymium transducer, the lowest power compression. The LF18N401 uses 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 52 mm. The unique Dual-forced air venting system guarantee a very efficient voice coil ventilation for minimum power compression and higher power handling.

Applications
The LF18N401 is ideal for use in applications where incredible power handling is required, long excursion and light weight. Specially designed for touring, perfect for high quality professional bass reflex and bass-horn systems. The transducer’s low frequency extension and control also makes it ideal for use within critical listening applications such as studio monitoring subwoofer systems.

4-inch Inside/outside copper voice coil
2400 Watt continuous program power handling
98 dB Sensitivity
30 Hz – 1 kHz Frequency range
Dual-forced air ventilation and 15 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 2400 Watts
Power handling capacity 1200 Watts
Sensitivity 98 dB
Frequency Range 30-1000 Hz
Effective Piston Diameter 395/15.6 mm/inch
Maximum Excursion Before Damage (peak to peak) 52/2.1 mm/inch
Minimum Impedance 6.3 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 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 Fs 32 Hz
DC resistance Re 5.1 Ohm
Mechanical factor Qms 6.5
Electrical factor Qes 0.27
Total factor Qts 0.26
BL factor BL 27.8 T – m
Effective Moving Mass Mms 201 gr
Equivalent Cas air load Vas 257 liters
Effective piston area Sd 0.122 m2
Max. linear excursion (mathematical) Xmax 8.8 mm
Voice – coil inductance @ 1kHz Le1k 2.5 mH
Half-space efficiency Eff 3.01 %
MOUNTING INFORMATION
Overall Diameter 465/18.3 mm/inch
Bolt Circle Diameter 442-447 mm
Bolt Hole Diameter 6.5/0.3 mm/inch
Front Mount Baffle Cut-out 424/16.7 mm/inch
Rear Mount Baffle Cut-out 424/16.7 mm/inch
Depth 205/8.1 mm/inch
Volume occupied by the driver 5.5 liters/ft3

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