Eighteensound 21NLW9001 Extended LF Neodymium Transducer Lautsprecher

Artikelnummer: ES21NLW9001

Extended LF Neodymium Transducer

Gewicht: 14 kg
Sie sparen: 17%
782,00 €
Von 2 Stück 636,10 €
Von 4 Stück 629,60 €
Von 8 Stück 623,10 €
Von 16 Stück 616,60 €
Sofort lieferbar Lieferzeit: 2 - 4 Tage
  • 98 dB SPL 1W / 1m average sensitivity
  • 135 mm (5.3 in) split winding four layers ISV copper coil
  • 3600 W program power handling
  • Carbon fiber reinforced cellulose cone
  • Double Silicon Spider (DSS) for improved excursion control
  • Aluminum demodulating ring (SDR) for lower distortion
  • Low noise forced ventilation design for low power compression
  • Weather protected cone and plates for outdoor usage
  • Suitable for vented and bandpass subwoofer systems

The 21NLW9001 is an ultra low frequency 21 inch neodymium high performance transducer. The transducer is the evolution of the 21NLW9001 subwoofer, and has been optimized for direct radiation and bandpass subwoofer cabinet designs. For optimum results recommended amplifier should be able to deliver 3600 Watt program power without clipping. At the heart of the updated design stays the improved double silicon spider based on DSS technology, letting the 21NLW9001 being able to control the moving mass with high linearity, showing an exceptional stability of mechanical parameter values in the long term. The transducer design features include a high performance large displacement suspension system for improved cone control at very high level of SPL matching. Eighteen Sound engineers have obtained the best possible results with today's available materials in terms of clean and undistorted LF reproduction at a ultra high SPL, with the lowest possible power compression figure. The state-of-the-art 5,3" diameter ISV copper voice coil is an inside-outside split winding, four layers design, enabling the 21NLW9001 to handle up to 3600W program power. Bl force factor, as well as all other electro-dynamic parameters, are linear within the working range. This, together with the high excursion design - 70mm before damage, ±14mm linear Xmax - makes the The 21NLW9001 has been developed after intense FEA and fluidodynamics simulation and testing, focusing on dissipating the heat generated by the powerful 5.3" coil. Special attention was given to the optimization of air flow into the gap without introducing audible noise. A special low density material air diffractor placed into the backplate acts as a cooling system, increasing the power handling capability and lowering the power compression figure. The low distortion and sound quality are further improved by an aluminum demodulating ring (SDR technology) that flatten impedance and phase with a constant power transfer. The carbon fiber reinforced, straight ribbed cone shows a proprietary resin treatment for extra pulp strength and water repellent properties. A special coating applied to both the top and back plates makes the transducer far more resistant to the corrosive effects of salts and oxidization.

Nominal Diameter 533 mm (21 in)
Rated Impedance 8 Ohm
AES Power 1600W
Program Power 3200W
Peak Power 9000W
Sensitivity 98 dB
Frequency Range 25 - 2000 Hz
Power Compression @-10dB 0,7 dB
Power Compression @-3dB 1,5 dB
Power Compression @Full Power 2,2 dB
Max Recomm. Frequency 120 Hz
Recomm. Enclosure Volume 120 ÷ 500 lt (4,24 ÷ 17,7 cuft)
Minimum Impedance 7,6 Ohm at 25°C
Max Peak To Peak Excursion 70 mm (2,75 in)
Voice Coil Diameter 135 mm (5,3 in)
Voice Coil Winding Material Copper wire
Suspension Triple roll, Heavy Polycotton
Cone Straight ribbed carbon fiber loaded cellulose
Thiele Small Parameters
Fs 32 Hz
Re 5,9 Ohm
Sd 0,1662 sq.mt. (257,6 sq.in.)
Qms 4,5
Qes 0,37
Qts 0,36
Vas 240 lt. (8,48 cuft)
Mms 385 gr. (0,85 lb)
BL 37 Tm
Linear Mathematical Xmax ±14 mm (±0,55 in)
Le (1kHz) 3,1 mH
Ref. Efficiency 1W@1m (half space) 95,5 dB
Mounting information
Overall diameter 545 mm (21,46 in)
N. of mounting holes and bolt 8
Mounting holes diameter 8,5 mm (0,33 in)
Bolt circle diameter 520 mm (20,47 in)
Front mount baffle cutout ø 492 mm (19,37 in)
Rear mount baffle cutout ø 490 mm (19,29 in)
Total depth 250 mm (9,8 in)
Flange and gasket thickness 18 mm (0,7 in)
Net weight 14 kg (30,86 lb)
Shipping weight 15,5 kg (34,17 lb)
CardBoard Packaging dimensions 570x570x290 mm (22,4x22,4x11,4 in)

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