WOOFER
LF18X451
Professional Low Frequency Transducer
PART NUMBER 11100091
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
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..
..
.
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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
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.
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
30
20
1000
100
1.000
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
Ø 465 mm
18 mm
194 mm
Thiele - Small Parameters
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
Ø 245 mm
Ø 421 mm
LF18X451
110
SPL, 1w/1m (dB)
100
90
80
20
100
1.000
10.000
20.000
Frequency (Hz)
Frequency
response
curve
of the
loudspeaker
make
in a in
hemispherical,
free field
in a reflex
box with in
anainternal
Frequency
response
curve
of the
loudspeaker
taken
a hemispherical,
free and
fieldmounted
environment
and mounted
volume
160with
litresanand
tuned volume
at 38Hz,ofapplying
a sinusoidal
of 2.83theV @8
closedofbox
internal
600 litres
(21,2 cu.ft)signal
enclosing
rearatof 1m.
the driver.
Impedance (ohms)
316
100
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
mm/inch
ohm
Watts
Watts
dB
Hz
mm/inch
mm/inch
ohm
mm/inch
30
5,4
6,7
0,29
0,28
30,5
260
220
0,122
13,5
2,6
1,90
Hz
ohm
T·m
gr
liters
m2
mm
mH
%
465 / 18,3
442-447 / 17,4-17,6
6,5 / 0,25
424 / 16,7
424 / 16,7
194 / 7,63
6,5 / 0,23
mm/inch
mm/inch
mm/inch
mm/inch
mm/inch
mm/inch
liters/ft3
15,2 / 33,4
16,2 / 35,5
Kg/Lbs Kg/
Lbs
mm/inch
mm/inch
4
Fs
Re
Qms
Qes
Qts
BL
Mms
Vas
Sd
Xmax
Le1K
Eff
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
10
Shipping Information
20
100
1.000
Frequency (Hz)
10.000
20.000
Net Weight
Shipping Weight
Impedance magnitude curve measured in free air.
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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