Overview4,5 - inch fiberglas Inside/Outside copper voice coil 3600 Watt continuous program power handling 97 dB Sensitivity 30 Hz - 1 kHz Frequency range Dual Forced Hyperventing System Dual spider designed with silicon based damping control BL of 30.5 Txm to provide a faster and accurate low frequency Specifications
Incredibly linear frequency response characteristics, the highest power handling of any comparable 18-inch transducer, the lowest power compression. The LF18X451 features a fibre loaded cone assembly along with a high excursion triple roll, constant geometry surround: this combination provides remarkable strength and a peak to peak maximum excursion of 54 mm. The new dual forced hyper-venting system guarantee a very efficient voice coil ventilation for minimum power compression and incredible power handling. A double silicon spider system ensures excellent control during large excursions. A fully optimised T-pole design generate the minimum amount of flux modulation.
Features General specifications
Nominal Diameter : 18 inch / 457 mm
Rated Impedance : 8 ohm
Program Power (watt) : 3600 W
Power handling capacity : 1800 W
Sensitivity : 97.0 dB
Frequency range : 30 - 1000 Hz
Effective piston diameter : 395 mm / 15.55 inch
Max. Excursion Before Damage : 54 mm / 2.13 inch
Minimum Impedance (ohm) : 6.8 ohm
Voice Coil Diameter : 4.5 inch / 114 mm
Voice Coil Winding Material : Copper
Voice Coil Length : 34 mm / 1.34 inch
Number of layers : 2
Kind of layers : inside/outside
Top Plate Thickness : 15 mm / 0.59 inch
Cone Design : Straight
Surround Material : Polycotton
Surround Design : Triple roll
Magnets : Ceramic
Dual-force air ventilation : Yes
Spider : 03
Thiele - small parameters
Resonance frequency (Fs) : 30 Hz
DC resistance (Re) (ohm) : 5.40 ohm
Mechanical factor : 6.70 Qms
Electrical factor : 0.29 Qes
Total factor : 0.28 Qts
Bl factor (Bl) (T x m) : 30.50 T x m
Effective moving mass (Mms) : 260.0 g
Equivalent Cas air loaded (Vas) : 220.0 liters
Effective piston area (Sd) : 0.120 m2
Max. linear excursion (Xmax) : 14 mm
Voice coil inductance @ 1kHz (Le1k) : 1.38 mH
Half-space efficency (Eff) : 1.90%
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 : 6.5 liters / 0.26 ft3
Standard compliance
Safety agency : CE compliant
Size / Weight
Height : 212 mm / 8.35 inches
Diameter : 465 mm / 18.31 inches
Weight : 15.2 kg / 33.51 lbs
Shipping information
Package Height : 254 mm / 10 inches
Package Width : 524 mm / 20.63 inches
Package Depth : 494 mm / 19.45 inches
Package Weight : 17 kg / 37.48 lbs
