Eighteen Sound 21LW2500

Eighteen Sound 21LW2500
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Key Features
  • 95 dB SPL 1W / 1m average sensitivity
  • 100 mm (4 in) Interleaved Sandwich Voice coil (ISV)
  • 3200 Watt program power handling
  • Composite reinforced straight ribbed cone
  • Optimized high grade ferrite magnet assembly
  • Recommended for subwoofer usage in compact vented or bandpass enclosures
DescriptionThe 21LW2500 is a 21" (533 mm) extended low frequency loudspeaker, designed for use in vented or bandpass enclosure. 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 3600 Watt program power. The 21LW2500 features a unique motor featuring a high grade ferrit magnet assembly in a structure optimized for thermal and magnetic efficiency. 21LW2500 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.
Date tehnice: General SpecificationsNominal Diameter533 mm (21 in)Rated Impedance8 OhmAES Power1600 W
Program Power3200 W
Peak Power7200 W
Sensitivity95 dB
Frequency Range30-1000Hz
Power Compression @-10dBTBD
Power Compression @-3dBTBD
Power Compression @Full PowerTBD
Max Recomm. Frequency200 Hz
Recomm. Enclosure Volume130 - 500 lt (4.59-17.7 cuft)
Minimum Impedance6,1 Ohm  @ 25°
Max Peak To Peak Excursion70 mm (2,76 in)
Voice Coil Diameter100 mm (4 in)
Voice Coil Winding MaterialCopper wire
SuspensionTriple roll, Heavy Polycotton
ConeCurved ribbed fiber loaded cellulose
Thiele Small ParametersFs30 Hz
Re4,8 Ohm
Sd0,166 sq. m (175,15 sq. in)
Qms9,35
Qes0,37
Qts0,35
Vas290 lt. (10,24 cu. ft)
Mms368 gr. (0,80 lb)
BL30,5 Tm
Linear Mathematical Xmax±14,5 mm (±0,57 in)
Le (1kHz)2,58 mH
Ref. Efficiency 1W@1m (half space)95,4 dB   
Mounting informationOverall diameter545 mm (21,46 in)N. of mounting holes and bolt8Mounting holes diameter8,5 mm (0,33 in)
Bolt circle diameter520 mm (20,47 in)
Front mount baffle cutout ø492 mm (19,37 in)
Rear mount baffle cutout ø490 mm (19,29 in)
Total depth252 mm (9,92 in)
Flange and gasket thickness18 mm (0,7 in)
Net weight17,9 kg (39,4 lb)
Shipping weight19,4 kg (42,7 lb)
CardBoard Packaging dimensions570x570x290 mm (22,4x22,4x11,4 in)
ModelsModel Code Information21LW2500 8 Ohm
Denumiri similare la Boxa auto Eighteen Sound 21LW2500: 21 LW 2500, 21 LW2500, 21LW 2500
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