18 Sound 21NLW9001 Extended LF Neodymium Driver 8ohm (price includes VAT)

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

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 21NLW9601

note: Price includes VAT

Nominal Diameter 533mm (21 in)
Rated Impedance 8 Ohm
AES Power 1800W
Program Power 3600W
Peak Power 10000W
Sensitivity 98 dB
Frequency Range 25 - 2000 Hz
Power Compression @ -10 dB 0.7 dB
Power Compression @ -3 dB 1.5 dB
Power Compression @ Full Power 2.2 dB
Max Recomm. Frequency 150 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 Technology split winding, 4 layers copper wire
Suspension Triple roll, Polycotton
Cone Straight ribbed carbon fiber loaded cellulose


Fs 32 Hz
Re 5,9 Ohm
Sd 0,1662 sq.mt. (257,6 sq.in.)
Qms 4,50
Qes 0,34
Qts 0,31
Vas 244 lt. (8,62 cuft)
Mms 390 gr. (0,86 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


Overall diameter 545 mm (21,46 in)
N. of mounting holes 8
Mounting holes diameter 8,5 mm (0,33 in)
Bolt circle diameter 520 mm (20,47 in)
Front mount baffle cutout diameter 492 mm (19,37 in)
Rear mount baffle cutout diameter 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 (30,9 lb)