- 4-inch, fiberglass inside/outside copper voice coil
- 2000W continuous program power handling
- 97.5 dB Sensitivity
- 25 Hz â 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
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.
- General specifications
- Nominal Diameter: 18 inch / 457 mm
- Rated Impedance: 8 ohm
- Program Power: 2000 W
- Power handling capacity: 1000 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
- Minimim Impedance: 6.0 ohm
- Voice Coil Diameter: 4.0 inch / 102 mm
- Voice Coil Winding Material: Copper
- Voice Coil Length: 25 mm / 0.98 inch
- Number of layers: 2
- Kind of layers: inside/outside
- Top Plate Thickness: 14 mm / 0.55 inch
- Cone Design: Straight
- Surround Material: Polycotton
- Surround Design: Triple roll
- Magnets: Ceramic
- Dual-force air ventilation: Yes
- Spider: Dual with silicon based damping control
- Thiele – small parameters
- Resonance frequency (Fs): 28 Hz
- DC resistance (Re): 5.10 ohm
- Mechanical factor: 6.50 Qms
- Electrical factor (Qes): 0.29 Qes
- Total factor: 0.27 Qts
- BL factor (BL): 25.00 T x m
- Effective moving mass (Mms): 192.0 g
- Equivalent Cas air loaded (Vas): 340.0 liters
- Effettive piston area (Sd): 0.120 m2
- Max. linear excursion (Xmax): 9.0 mm
- Voice coil inductance @ 1kHz (Le1k): 1.20 mH
- Half-space efficency (Eff): 2.64%
- 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: 424 mm / 16.69 inch
- Volume occupied by the driver: 7 liters / 0.28 ft3
- Standard compliance
- CE marking: Yes
- Size
- Weight: 13.3 kg / 29.32 lbs
- Height: 228 mm / 8.98 inches
- Diameter: 465 mm / 18.31 inches
- Shipping informations
- Package Width: 500 mm / 19.69 inches
- Package Weight: 15.6 kg / 34.39 lbs
- Package Height: 270 mm / 10.63 inches
- Package Depth: 510 mm / 20.08 inches
