18LW2500

Extended LF Ferrite Transducer

Key Features

  • 95 dB SPL 1W / 1m average sensitivity
  • 100 mm (4 in) Interleaved Sandwich Voice coil (ISV)
  • 3200W program power handling
  • 70 mm (2,76 in) peak to peak excursion
  • Ultra linear dual magnet motor design
  • Single Demodulating Ring (SDR) for lower distortion
  • Composite reinforced straight ribbed cone
  • Optimized high grade ferrite magnet assembly
  • Recommended for subwoofer usage in compact vented enclosures
Datasheet Back

Description

The 18LW2500 is a 18" (466 mm) extended low frequency loudspeaker, designed for use in vented enclosures. The loudspeaker is designed to withstand high power levels without damage while providing clean and undistorted LF reproduction at a very high SPL. For optimum results we recommend amplifiers able to deliver 3400 Watt program power. The 18LW2500 features a unique motor featuring a high grade ferrit magnet assembly in a structure optimized for thermal and magnetic efficiency. 18LW2500 features include a large displacement suspension system which, in conjunction with a composite reinforced, straight ribbed cone and the Eighteen Sound proprietary Double Silicon Spider (DSS) technology, allows an ultra-linear piston action and provides full mechanical control across the entire working range. The 100mm (4 in) state-of-the-art voice-coil utilizing Interleaved Sandwich Voice coil (ISV) technology, provides high levels of thermal stability and durability. The ISV technology achieves a balanced linear motor unit exerting an exceptionally high force factor.



General Specifications

Nominal Diameter 462 mm (18 in)
Rated Impedance 8 Ohm
AES Power 1600 W
Program Power 3200 W
Peak Power 7200 W
Sensitivity 95 dB
Frequency Range 30 Hz - 1000 Hz
Power Compression @-10dB 0,6 dB
Power Compression @-3dB 2,2 dB
Power Compression @Full Power 3,3 dB
Max Recomm. Frequency 250 Hz
Recomm. Enclosure Volume 160-350 lt (4.59 - 12.37 cuft)
Minimum Impedance 6,1 @ 25°
Max Peak To Peak Excursion 70 mm (2,76 in)
Voice Coil Diameter 100 mm (4 in)
Voice Coil winding material Copper wire
Suspension Triple roll, Heavy Polycotton
Cone Curved ribbed fiber loaded cellulose

Thiele Small Parameters

Fs 34 Hz
Re 4,9 Ohm
Sd 0,113 sq.m (175,15 sq.in)
Qms 22
Qes 0,34
Qts 0,33
Vas 135 lt. (4.76 cu.ft)
Mms 290 gr. (0,64 lb)
BL 30 Tm
Linear Mathematical Xmax ±14 mm (±0,55 in)
Le (1kHz) 2,87 mH
Ref. Efficiency 1W@1m (half space) 93,8 dB

Mounting information

Overall diameter 462 mm (18,18 in)
N. of mounting holes and bolt 8
Mounting holes diameter 8,5 mm (0,33 in)
Bolt circle diameter 440 mm (17,32 in)
Front mount baffle cutout ø 416 mm (16,38 in)
Rear mount baffle cutout ø 422 mm (16,61 in)
Total depth 234 mm (9,21 in)
Flange and gasket thickness 26 mm (1,02 in)
Net weight 16,7 kg (36,8 lb)
Shipping weight 18,2 kg (40,1 lb)
Packaging Dimensions 482x482x257 mm (18,98x18,98x10,12 in)

Models

Model Code Info
18LW2500 0221882500 8 Ohm
18LW2500 0221842500 4 Ohm

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