Eighteen Sound 21NLW9001

Eighteen Sound 21NLW9001
Eighteen Sound 21NLW9001
General Specifications Datasheet
Brand Eighteen Sound
Reference 21NLW9001
Size 21 in
533 mm
Type Low frequency
Impedance Z 8 Ω
Minimum impedance Zmin 7.6 Ω
Nominal Power P 1800 W
Program Power Pmax 3600 W
Sensitivity SPL 95 dB
Usable frequency range 25 - 1500 Hz
Recommended crossover 150 Hz
  • 95 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
Eighteen Sound 21NLW9001 Frequency response
Eighteen Sound 21NLW9001 Impedance
Thiele/Small parameters Values in gray are calculated.
Resonant frequency Fs 32 Hz
Surface area of cone Sd 1662 cm²
DC resistance Re 5.9 Ω
Mechanical Q Qms 4.50
Electromagnetic Q Qes 0.34
Total Q factor Qts 0.31
Mechanical suspension compliance Cms 62 µm/N
Compliance equivalent air volume Vas 244 liters
Moving mass Mmd 350.9 g
Moving mass (including airload) Mms 390 g
Mechanical resistance Rms 17.4 N·s/m
BL product BL 37 T·m
Voice coil inductance Le 3.1 mH
Maximum linear excursion (one way) Xmax 14 mm
Maximum mechanical limit (one way) Xlim 35 mm
Efficiency η₀ 2.24 %
Efficiency bandwidth product EBP 94
Effective diaphragm diameter Ø 46 cm
Import this driver in a simulation software:
WinISD 18Sound 21NLW9001.wdr
Hornresp 18Sound 21NLW9001.txt
Basta! 18Sound 21NLW9001.bastaelement
Eighteen Sound 21NLW9001 Dimensions
Dimensions
Overall diameter 545 mm
Baffle hole diameter 490 mm
Overall depth 250 mm
Flange thickness 18 mm
Net weight 13.4 kg
Materials of construction
Diaphragm material Carbon Fiber reinforced Cellulose
Diaphragm shape Straight
Surround material Polycotton
Voice Coil Parameters
Voice coil diameter 135 mm
Coil material Copper
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This page may contain errors or inaccuracies. Please check the up-to-date specifications on the manufacturer website before starting your project.

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