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.
Features
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95 dB SPL 1W / 1m average sensitivity
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100 mm (4 in) Interleaved Sandwich Voice coil (ISV)
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3200W program power handling
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70 mm (2,76 in) peak to peak excursion
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Ultra linear dual magnet motor design
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Single Demodulating Ring (SDR) for lower distortion
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Composite reinforced straight ribbed cone
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Optimized high grade ferrite magnet assembly
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Recommended for subwoofer usage in compact vented enclosures
Specification
General Specifications
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Nominal Diameter: 462 mm (18 in)
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Rated Impedance: 8 Ohm
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AES Power: 1600 W
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Program Power: 3200 W
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Peak Power: 7200 W
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Sensitivity: 95 dB
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Frequency Range: 30 Hz - 1000 Hz
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Power Compression @-10dB: 0,6 dB
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Power Compression @-3dB: 2,2 dB
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Power Compression @Full Power: 3,3 dB
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Max Recomm. Frequency: 250 Hz
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Recomm. Enclosure Volume: 160-350 lt (4.59 - 12.37 cuft)
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Minimum Impedance: 6,1 @ 25°
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Max Peak To Peak Excursion: 70 mm (2,76 in)
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Voice Coil Diameter: 100 mm (4 in)
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Voice Coil winding material: Copper wire
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Suspension: Triple roll, Heavy Polycotton
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Cone: Curved ribbed fiber loaded cellulose
Thiele Small Parameters
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Fs 34 Hz
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Re 4,9 Ohm
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Sd 0,113 sq.m (175,15 sq.in)
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Qms 22
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Qes 0,34
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Qts 0,33
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Vas 135 lt. (4.76 cu.ft)
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Mms 290 gr. (0,64 lb)
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BL 30 Tm
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Linear Mathematical Xmax ±14 mm (±0,55 in)
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Le (1kHz) 2,87 mH
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Ref. Efficiency 1W@1m (half space) 93,8 dB
Mounting information
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Overall diameter: 462 mm (18,18 in)
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N. of mounting holes and bolt: 8
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Mounting holes diameter: 8,5 mm (0,33 in)
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Bolt circle diameter: 440 mm (17,32 in)
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Front mount baffle cutout: ø 416 mm (16,38 in)
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Rear mount baffle cutout: ø 422 mm (16,61 in)
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Total depth: 234 mm (9,21 in)
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Flange and gasket thickness: 26 mm (1,02 in)
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Net weight: 16,7 kg (36,8 lb)
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Shipping weight: 18,2 kg (40,1 lb)
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Packaging Dimensions: 482x482x257 mm (18,98x18,98x10,12 in)