RCF Woofer LF18X401

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