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RCF LF18X400 18" 1000 Watts 8ohm Ferrite Loudspeaker


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RCF LF18X400 18" 1000W 8ohm Ferrite Loudspeaker

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 Precisions 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.


The LF18X400 is ideal for use in applications where incredible power handling,long excursion and perfect control is required.
Ideal for high quality professional bass reflex and bass-horn system.
The transducers low frequency extension, coupled with its extremely low generation of harmonic distortion,also makes it ideal for use within critical listening applications such as studio monitoring subwoofer system.

Main 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


Nominal Diameter: 460 / 18mm/inch
Rated Impedance: 8 ohm
Program Power: 2000 W AES
Power Handling Capacity: 1000 W AES
Sensitivity: 97.5 dB
Frequency Range: 25 Hz / 1000Hz
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


Resonance Frequency: 28 Hz
DC Resistance: 5.1 ohms
Mechanical Factor: 6.5
Electrical Factor: 0.29
Total Factor: 0.27
BL Factor: 25 T . m
Effective Moving Mass: 192g
Equivalent Cas air load: 340 liters
Effective Piston Area: 0.122 m2
Max. linear excursion (mathematical): 9.0 mm
Voice - coil inductance @ 1kHz: 2.3mH
Half-space efficiency: 2.64%


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


Shipping weight: 14.3 / 31.5 kg/lbs

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