RCF LF18X401 ΜΕΓΑΦΩΝΟ 18″ Bass Speaker 1500 watt power 4inch VC

RCF LF18X401 18" Low Frequency Woofer w/ 4" Voice Coil Very 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 LF18X401 uses a fibre loaded cone assembly along with a high excursion triple roll surround. This combination provides remarkable strength and a peak to peak maximum excursion of 50 mm. The new dual forced hyper-venting system guarantee a very efficient voice coil ventilation for minimum power compression and incredible power handling.

• 4-inch, fiberglass inside/outside copper voice coil
• 3000W continuous program power handling
• 97.5 dB Sensitivity
• 25 Hz 1 kHz Frequency range
• Dual Forced Hyperventing System
• Dual spider design with silicon based dampening control
• Triple-roll surround and corrugated straight cone geometry

General specifications
Cone Design: Straight
Dual-force air ventilation: Yes
Effective piston diameter: 395 mm / 15.55 inch
Frequency range: 25 - 1000 Hz
Kind of layers: inside/outside
Magnets: Ceramic
Max. Excursion Before Damage: 50 mm / 1.97 inch
Minimim Impedance: 6 ohm
Nominal Diameter: 18 inch / 457 mm
Number of layers: 2
Power handling capacity: 1500 W
Program Power: 3000 W
Rated Impedance: 8 ohm
Sensitivity: 97 dB
Spider: Dual with silicon based damping control
Surround Design: Triple roll
Surround Material: Polycotton
Top Plate Thickness: 15 mm / 0.59 inch
Voice Coil Diameter: 4.0 inch / 102 mm
Voice Coil Material: Copper
Voice Coil Winding Material: 30 mm / 1.18 inch

Mounting Information
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
Overall diameter: 465 mm / 18.31 inches
Rear mount baffle cut-out: 425 mm / 16.73 inch
Volume occupied by the driver: 6.5 liters / 0.26 ft3

Size
Diameter: 465 mm / 18.31 inches
Height: 196 mm / 7.72 inches
Weight: 12.5 kg / 27.56 lbs

Standard compliance
CE marking: Yes

Thiele - small parameters
BL factor (BL): 26.50 T x m
DC resistance (Re): 5.40 ohm
Effective moving mass (Mms): 215 gr
Effettive piston area (Sd): 0.12 m2
Electrical factor (Qes): 0.31 Qes
Equivalent Cas air loaded (Vas): 274 liters
Half-space efficency (Eff): 2.30%
Max. linear excursion (Xmax): 12 mm
Mechanical factor: 7.40 Qms
Resonance frequency (Fs): 30 Hz
Total factor: 0.30 Qts
Voice coil inductance @ 1kHz (Le1k): 0.83 mH

• 1000Wrms continuous power handling (AES Standard)
• Flexirol™ technology for greater excursion control
• Double suspension for exceptional linearity at the highest excursions
• Saturated gap technology for lower harmonic distortion
• Extremely low frequency response, down to 30Hz
• Smart chassis design minimises acoustic distortion