RCF LF 18N401

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 remarkablestrength venting system guarantee a very efficient voice coil ventilation for minimum power compression and higher power handling.

More Information

4 - inch, fiberglass 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 15mm top plate for minimum power compression
Dual spider design with silicon based dampening control
Triple-roll surround and corrugated straight cone geometry

Technical Specification

General Specifications

Nominal Diameter: 460mm / 18inch
Rated Impedance: 8 O
Program Power: 2400 W AES
Power handling capacity: 1200 W AES
Sensitivity: 98 dB
Frequency Range: 30 Hz - 1000 Hz
Effective Piston Diameter: 395mm / 15.6inch
Max Excursion Before Damage (peak to peak): 52mm / 2.1inch
Minimum Impedance: 6.3 O
Voice Coil Diameter: 100mm / 4inch
Voice Coil Material: Copper
Voice Coil Winding Depth: 25mm / 1.0inch
Number of layers: 2
Kind of layer: inside / outside
Top Plate Thickness: 15mm / 0.6inch
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: 5.1 Ohms
Mechanical factor: 6.5
Electrical factor: 0.27
Total factor: 0.26
BL Factor: 27.8 T · m
Effective Moving Mass: 201 g
Equivalent Cas air load: 257 litres
Effective piston area: 0.122 m²
Max. linear excursion (mathematical): 8.8 mm
Voice - coil inductance @ 1kHz: 2.5 mH
Half-space efficiency: 3.01%

Mounting information

Overall Diameter: 465mm / 18.3inch
Bolt Circle Diameter: 442-447mm / 17.4-17.6inch
Bolt Hole Diameter: 6.5mm / 0.3inch
Front Mount Baffle Cut-out: 424mm / 16.7inch
Rear Mount Baffle Cut-out: 424mm / 16.7inch
Depth: 205mm / 8.1inch
Volume occupied by the driver: 5.5 litre s/ 0.19 ft³
Net Weight: 9.1 kg / 20.2 lbs

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