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

• 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

Specification

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)