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 Precision’s 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.
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
Specifications
- Nominal Diameter: 460 / 18 mm/inch
- Rated Impedance: 8 Ω
- Program Power: 2000 W AES
- Power handling capacity: 1000 W AES
- Sensitivity: 97.5 dB
- Frequency Range: 25 Hz ÷ 1000 Hz
- Effective Piston Diameter: 395 / 15.6 mm/inch
- Max Excursion Before Damage (peak to peak): 50 / 2.0 mm/inch
- Minimum Impedance: 6.0 Ω
- 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: 5.1Ω
- Mechanical factor: 6.5
- Electrical factor: 0.29
- Total factor: 0.27
- BL Factor: 25 T · m
- Effective Moving Mass: 192 g
- Equivalent Cas air load: 340 liters
- Effettive piston area: 0.122 m²
- Max. linear excursion (mathematical): 9.0 mm
- Voice - coil inductance @ 1kHz: 2.3 mH
- 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