Very 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 LF18X401 uses a fibre loaded cone assembly along with a high excursion triple roll surround. This combination provides remarkable strength and a peak to peak maximum excursion of 50 mm. The new dual forced hyper-venting system guarantee a very efficient voice coil ventilation for minimum power compression and incredible power handling.
4-inch, fiberglass inside/outside copper voice coil
3000W continuous program power handling
97.5 dB Sensitivity
25 Hz – 1 kHz Frequency range
Dual Forced Hyperventing System
Dual spider design with silicon based dampening control
Triple-roll surround and corrugated straight cone geometry
GENERAL SPECIFICATIONS
Nominal Diameter: 18 inch / 457 mm
Rated Impedance: 8 ohm
Program Power (watt): 3000 W
Power handling capacity: 1500 W
Sensitivity: 97.5 dB
Frequency range: 25 - 1000 Hz
Effective piston diameter: 395 mm / 15.55 inch
Max. Excursion Before Damage: 50 mm / 1.97 inch
Minimum Impedance (ohm): 6.5 ohm
Voice Coil Diameter: 4.0 inch / 102 mm
Voice Coil Length: 30 mm / 1.18 inch
Number of layers: 2
Kind of layers: inside/outside
Top Plate Thickness: 15 mm / 0.59 inch
Cone Design: Straight
Surround Design: Triple roll
Dual-force air ventilation: Yes
THIELE - SMALL PARAMETERS
Resonance frequency (Fs): 30 Hz
DC resistance (Re) (ohm): 5.40 ohm
Mechanical factor: 7.40 Qms
Electrical factor: 0.31 Qes
Total factor: 0.30 Qts
Bl factor (Bl) (T x m): 26.50 T x m
Effective moving mass (Mms): 215.0 g
Equivalent Cas air loaded (Vas): 274.0 liters
Effective piston area (Sd): 0.120 m2
Max. linear excursion (Xmax): 12 mm
Voice coil inductance @ 1kHz (Le1k): 0.83 mH
Half-space efficency (Eff): 2.30%
MOUNTING INFORMATION
Overall diameter: 465 mm / 18.31 inches
Bolt circle diameter: 442-447 mm / 17.4-17.6 inch
Bolt hole diameter: 7 mm / 0.28 inch
Front mount baffle cut-out: 424 mm / 16.69 inch
Rear mount baffle cut-out: 425 mm / 16.73 inch
Volume occupied by the driver: 6.5 liters / 0.26 ft3
SIZE
Height: 196 mm / 7.72 inches
Diameter .465 mm / 18.31 inches
Weight: 12.5 kg / 27.56 lbs
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