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WOOFER
LF18X451
Professional Low Frequency Transducer
PART NUMBER 11100091
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Features
4.5 - inch, fibreglass inside-outside copper voice coil
3600 Watt continuous program power handling
97 dB Sensitivity
30 Hz - 1 kHz Frequency range
30.5 T/m BL
54 mm peak-to-peak excursion
Dual-forced hyper-venting and 15mm 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, 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.
Applications
The LF18X451 is ideal in applications where combinations of incredible power handling, reasonable weight and ultra fast time response are required.
Perfect for powerful lows in horn loaded sub bass systems or reflex designs.
Ideal for touring, find a perfect application in high power, heavy duty, club subwoofer systems.
20
30
100
1000
1.000
10.000
20.000
LF21X451
18 mm
194 mm
Ø 465 mm
Ø 245 mm
Ø 421 mm
LF18X451
10.000
20.000
Frequency response curve of the loudspeaker taken in a hemispherical, free field environment and mounted in a closed box with an internal volume of 600 litres (21,2 cu.ft) enclosing the rear of the driver.
10.000
20.000
General Specifications
Nominal Diameter
Rated Impedance
Program Power 1
Power handling capacity 2
Sensitivity 3
Frequency Range
Effective Piston Diameter
Max Excursion Before Damage (peak to peak)
Minimum Impedance
Voice Coil Diameter
Voice Coil Material
Voice coil former material
Voice Coil Winding Depth
Number of layers
Kind of layer
Top Plate Thickness
Cone Material
Cone Design
Surround Material
Surround Design
Thiele - Small Parameters
4
Resonance frequency
DC resistance
Mechanical factor
Electrical factor
Total factor
BL Factor
Effective Moving Mass
Equivalent Cas air load
Effettive piston area
Max. linear excursion (mathematical) 5
Voice - coil inductance @ 1KHz
Half-space efficiency
Fs
Re
Qms
Qes
Qts
BL
Mms
Vas
Sd
Xmax
Le1K
Eff
0,28
30,5
260
220
30
5,4
6,7
0,29
0,122
13,5
1,4
1,90
460 / 18
8
3600
1800
97
30-1000
395 / 15,6
54 / 2,12
6,8
115 / 4.5
Copper
Fiberglass
34 / 1,33
2
inside/outside
15 / 0,6
No pressed pulp
Straight
Polycotton
Triple roll
Mounting Information
Overall Diameter
Bolt Circle Diameter
Bolt Hole Diameter
Front Mount Baffle Cut-out
Rear Mount Baffle Cut-out
Depth
Volume occupied by the driver 6
Shipping Information
Net Weight
Shipping Weight
465 / 18,3
442-447 / 17,4-17,6
6,5 / 0,25
424 / 16,7
425 / 16,7
198 / 7,79
6,5 / 0,23
15,2 / 33,4
16,2 / 35,5 mm/inch ohm
Watts
Watts dB
Hz mm/inch mm/inch ohm mm/inch mm/inch mm/inch
Hz ohm
T · m gr liters m 2 mm mH
% mm/inch mm/inch mm/inch mm/inch mm/inch mm/inch liters/ft3
Kg/Lbs Kg/
Lbs
Notes to Specifications
1 Program Power is defined as 3 dB greater than AES power. - 2 AES standard. - 3 Sensitivity measurement is based on a 500-2,5 kHz pink noise signal with input power of 2.83V @ 8 Ohms. - 4 Thiele-Small parameters are measured after a 2 hour warm up period running the loudspeaker at full power handling capacity. - 5 The maximum linear excursion is calculated as: (Hvc - Hg)/2 + Hg/4 where Hvc is the voice coil depth and Hg the gap depth. - 6 Calculated for front mounting on 18 mm thick board.
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