The LF18N451 is a very high power handling and efficiency transducer specially designed to provide powerful and accurate sub-bass frequencies with low distortion and low power compression. Ultra fast time response. The LF18N451 uses a fibre loaded cone assembly along a large triple roll surround, this combination provides remarkable strength and control. Double silicon spider sysetm ensures excellent control during large excursions.
A fully optimized T-pole design generate the minimum amount of flux modulation. The Dual-forced air venting system provides a very efficient voice coil ventilation to minimize the power compression.
• 4.5 - inch Inside/Outside copper voice coil
• 3000 Watt continuous program power handling
• 97.5 dB Sensitivity
• 30 Hz - 1 kHz Frequency range
• Dual-forced air ventilation for minimum power compression
• Dual spider designed with silicon based damping control
• BL of 30.2 Txm to provide a faster and accurate low frequency
General specifications
Cone Design: Curved
Dual-force air ventilation: Yes
Effective piston diameter: 395 mm / 15.55 inch
Frequency range: 30 - 1000 Hz
Kind of layers: inside/outside
Magnets: Neodymium
Max. Excursion Before Damage: 60 mm / 2.36 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: 4.5 inch / 114 mm
Voice Coil Material: Copper
Voice Coil Winding Material: 26 mm / 1.02 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: 5.5 liters / 0.22 ft3
Size
Diameter: 465 mm / 18.31 inches
Height: 223 mm / 8.78 inches
Weight: 10.5 kg / 23.15 lbs
Standard compliance
CE marking: Yes
Thiele - small parameters
BL factor (BL): 30.20 T x m
DC resistance (Re): 5.00 ohm
Effective moving mass (Mms): 235 gr
Effettive piston area (Sd): 0.12 m2
Electrical factor (Qes): 0.25 Qes
Equivalent Cas air loaded (Vas): 245 liters
Half-space efficency (Eff): 2.54%
Max. linear excursion (Xmax): 9 mm
Mechanical factor: 6.00 Qms
Resonance frequency (Fs): 31 Hz
Total factor: 0.24 Qts
Voice coil inductance @ 1kHz (Le1k): 2.60 mH
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