18 Sound 21NLW4000 1500watt 8ohm Extended LF Neodymium Driver 8ohm

94 dB SPL 1W / 1m average sensitivity
100 mm (4 in) Interleaved Sandwich Voice coil (ISV)
3200 W program power handling
70 mm (2,76 in) peak to peak excursion
Composite reinforced straight ribbed cone
Optimized high grade neodymium magnet assembly
Recommended for subwoofer usage in compact vented or bandpass enclosures

Designed & manufatured in Italy and provided exclusively by Lean Business, this Eighteen Sound speaker comes complete wth 2 years warranty.

See specification tab for technical details or Click HERE for full details, response curves and Thiele & Small parameters. (opens in new window)

Model: 18 Sound 21NLW4000

note: Price includes VAT

General Specifications

Nominal Diameter 533mm (21 in)
Rated Impedance 8 Ohm
AES Power 1500W
Program Power 3200 W
Peak Power 7200 W
Sensitivity 94 dB
Frequency Range 30-1800Hz
Power Compression @-10dB 0,62 dB Power
Compression @-3dB 2,18 dB
Power Compression @Full Power 3,57 dB
Max Recomm. Frequency 150Hz
Recomm. Enclosure Volume 120-300 lt (4.24 - 10.60 cuft)
Minimum Impedance 6 Ohm at 25°C
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, Polycotton
Cone Complex Composite

Thiele Small Parameters

Fs 29 Hz
Re 4,9 Ohm
Sd 0,166 sq. mt. (257,30 sq. in.)
Qms 22,0
Qes 0,38
Qts 0,37
Vas 305 lt. (10,77 cuft)
Mms 380 gr. (0,83 lb)
BL 30,0 Tm
Linear Mathematical Xmax ± 15 mm (± 0,59 in)
Le (1kHz) 2,80 mH
Ref. Efficiency 1W@1m (half space) 2%

Mounting information

Overall diameter 545mm (21,46 in)
N. of mounting holes and bolt 8
Mounting holes diameter 8,5 mm (0,33 in)
Bolt circle diameter 520mm (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 245 mm (9,64 in)
Flange and gasket thickness 18 mm (0,7 in)
Net weight 11,6 kg (25.5 lb)
Shipping weight 13,1 Kg (28,8 lb)
Packaging Dimensions 13,1 Kg (28,8 lb)