Eighteen Sound 21NLW4000

Eighteen Sound 21NLW4000
Eighteen Sound 21NLW4000
General Specifications Datasheet
Brand Eighteen Sound
Reference 21NLW4000
Size 21 in
533 mm
Type Low frequency
Impedance Z 8 Ω
Minimum impedance Zmin 6.0 Ω
Nominal Power P 1600 W
Program Power Pmax 3200 W
Sensitivity SPL 94 dB
Usable frequency range 30 - 1800 Hz
Recommended crossover 150 Hz
  • 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
  • Single Demodulating Ring (SDR) for lower distortion
  • Composite reinforced straight ribbed cone
  • Optimized high grade neodymium magnet assembly
  • Recommended for subwoofer usage in vented enclosures
Eighteen Sound 21NLW4000 Frequency response
Eighteen Sound 21NLW4000 Impedance
Thiele/Small parameters Values in gray are calculated.
Resonant frequency Fs 29 Hz
Surface area of cone Sd 1660 cm²
DC resistance Re 4.9 Ω
Mechanical Q Qms 22.00
Electromagnetic Q Qes 0.38
Total Q factor Qts 0.37
Mechanical suspension compliance Cms 78 µm/N
Compliance equivalent air volume Vas 305 liters
Moving mass Mmd 341 g
Moving mass (including airload) Mms 380 g
Mechanical resistance Rms 3.1 N·s/m
BL product BL 30 T·m
Voice coil inductance Le 2.8 mH
Maximum linear excursion (one way) Xmax 15 mm
Maximum mechanical limit (one way) Xlim 35 mm
Efficiency η₀ 2 %
Efficiency bandwidth product EBP 76
Effective diaphragm diameter Ø 46 cm
Import this driver in a simulation software:
WinISD 18Sound 21NLW4000.wdr
Hornresp 18Sound 21NLW4000.txt
Basta! 18Sound 21NLW4000.bastaelement
Eighteen Sound 21NLW4000 Dimensions
Dimensions
Overall diameter 545 mm
Baffle hole diameter 490 mm
Overall depth 245 mm
Flange thickness 18 mm
Net weight 11.6 kg
Materials of construction
Diaphragm material Composite
Surround material Polycotton
Voice Coil Parameters
Voice coil diameter 100 mm
Coil material Copper
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