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Eighteensound 18LW1250 Extended LF Ferrite Transducer Lautsprecher

Artikelnummer: ES18LW1250

Extended LF Ferrite Transducer

Sofort lieferbar
  • 98 dB SPL 1W / 1m average sensitivity
  • 100 mm (4 in) Interleaved Sandwich Voice coil (ISV)
  • 1000 W AES power handling
  • Double Silicon Spider (DSS) for improved excursion control and linearity
  • Weather protected cone and plates for outdoor usage
  • Improved heat dissipation via unique basket design and backplate vents
  • Suitable for high SPL subwoofer design

The 18LW1250 is a 18 inch (460 mm) high performance extended low frequency transducer. It has been designed for use as a low bass or sub-woofer component, in either a reflex, bandpass or horn loaded configuration, in high power loudspeaker systems. The 18LW1250 design has evolved from extensive research carried out at our own R&D and Engineering facilities. It provides clean, undistorted low frequency reproduction at very high levels and is able to withstand high power without damage. The transducer design features include a large displacement suspension system which in conjunction with a high quality cone and the Eighteen Sound Double Silicon Spider (DSS), assure a very linear piston action and provide full control across the entire working range. This is further improved by a inside outside copper voice coil, based on our Interleaved Sandwich Voice coil (ISV) technology. This provides high levels of thermal stability and durability. The ISV technology is based on a high strength fiberglas former with half the coil wound on the outside and half on the inside, bonded together using unique high temperature resin adhesives. The result is a balanced linear motor exerting a very high force factor. Excellent heat dissipation is derived from a basket design which incorporates air channels between the basket and the magnetic top plate. In addition, eight air vents in the back plate, aligned with the voice coil, force the air into the lower part of the gap. Maximum flux density in the gap is assured by the special top and back plate design, resulting in a high BL factor. Due to the increasing use of audio systems at outdoor events, the ability to perform in adverse weather conditions or in areas of high humidity is a key feature of the 18LW1250. This has been achieved using exclusive cone treatment and magnetic plate processes which increase resistance to corrosion and render the cone water repellent.

Nominal Diameter 460 mm (18 in)
Rated Impedance 8 Ohm
AES Power 1000 W
Program Power 1400 W
Peak Power 7000 W
Sensitivity 98 dB
Frequency Range 35 - 3500 Hz
Power Compression @-10dB 0,7 dB
Power Compression @-3dB 1,6 dB
Power Compression @Full Power 2,6 dB
Max Recomm. Frequency 150 Hz
Recomm. Enclosure Volume 120 ÷ 350 lt. (4,24 ÷ 12,36 cuft)
Minimum Impedance 6,4 Ohm at 25°C
Max Peak To Peak Excursion 36 mm (1,42 in
Voice Coil Diameter 100 mm (4 in)
Voice Coil Winding Material copper
Suspension M-roll. Polycotton
Cone Curvilinear, Paper
Thiele Small Parameters
Fs 35 Hz
Re 5 Ohm
Sd 0,1134 sq.mt. (175,7 sq.in.)
Qms 8
Qes 0,28
Qts 0,27
Vas 268 lt. (9,47 cuft)
Mms 142 gr. (0,31 lb)
BL 23,6 Tm
Linear Mathematical Xmax ± 9 mm (±0,35 in)
Le (1kHz) 2,73 mH
Ref. Efficiency 1W@1m (half space) 98 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 438-440 mm (17,24-17,32 in)
Front mount baffle cutout ø 416 mm (16,38 in)
Rear mount baffle cutout ø 412 mm (16,22 in)
Total depth 207,9 mm (8,18 in)
Flange and gasket thickness 19 mm (0,75 in)
Net weight 13 kg (28,7 lb)
Shipping weight 14,7 kg (32,45 lb)
CardBoard Packaging dimensions 482 x 482 x 257 mm (19 x 19 x 10,1 in)

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