woofer lf18x451

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woofer lf18x451 | Manualzz

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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