RCF LF18X401 18" 1500W Bass Driver


RCF LF18X401 18" 1500W Bass Driver


Incredibly linear frequency response characteristics, the highest power handling of any comparable 18-inch transducer, the lowest power compression.

The LF18X401 features a fibre loaded cone assembly along with a high excursion triple roll, constant geometry surround. This combination provides remarkable strength venting system guarantee a very efficient voice coil ventilation for minimum power compression and higher power handling.


The LF18X401 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 system. Ideal for use within critical listening applications as studio monitoring subwoofer system.

General Specifications:

Nominal Diameter: 460 mm / 18 inch
Rated Impedance: 8 Ohms
Power handling capacity: 1500 W AES
Sensitivity: 97.5 dB
Frequency Range: 25 Hz - 1000 Hz
Effective Piston Diameter: 395 mm / 15.6 inch
Max Excursion Before Damage (peak to peak): 50 mm / 1.97 inch
Minimum Impedance: 6.5 Ohms
Voice Coil Diameter: 100 mm / 4 inch
Voice Coil Material: Copper
Voice Coil Winding Depth: 30 mm / 1.18 inch
Number of layers: 2
Kind of layer: inside / outside
Top Plate Thickness: 15 mm /0.6 inch
Cone Material: No pressed pulp
Cone Design: Straight
Surround Material: Polycotton
Surround Design: Triple roll

Thiele/Small Parameters :

Resonance frequency: 30 Hz
DC resistance: 5.4 Ohms
Mechanical factor: 7.4
Electrical factor: 0.31
Total factor: 0.30
Bl: 26.5 T m
Effective Moving Mass: 215 g
Equivalent Cas air load: 274 litres
Effective piston area: 0.122 sq m
Max. linear excursion (mathematical): 11.5 mm
Voice - coil inductance @ 1kHz: 1.2 mH
Half-space efficiency: 2.30%

Mounting information:

Overall Diameter: 465 mm / 18.3 inch
Bolt Circle Diameter: 442-447 mm / 17.4-17.6 inch
Bolt Hole Diameter: 6.5 mm / 0.25 inch
Front Mount Baffle Cut-out: 424 mm / 16.7 inch
Rear Mount Baffle Cut-out: 424 mm / 16.7 inch
Depth: 210 mm / 8.3 inch
Volume occupied by the driver: 6.5 litres / 0.23 cu ft
Net Weight: 13.3 kg / 29.3 lbs