Eighteen Sound 21NLW9001

Eighteen Sound 21NLW9001
Eighteen Sound 21NLW9001
General Specifications Datasheet
Brand Eighteen Sound
Reference 21NLW9001
Manufacturer website www.eighteensound.com
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
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 350.93 g
Moving mass (including airload) Mms 390 g
Mechanical resistance Rms 17.42 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 545.0 mm
Baffle hole diameter 490.0 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
Similar drivers Power
(W)
SPL
(dB)
Fs
(Hz)
Sd
(cm²)
Qms
Qes
Vas
(L)
Xmax
(mm)
Eighteen Sound 21NLW9001 1800 95 32 1662 4.50 0.34 244 14.0
Eighteen Sound 21NLW9601 1800 96 37 1662 5.50 0.31 175 14.0
Eighteen Sound 21NTLW5000 1800 97 31 1662 5.20 0.38 270 17.5
B&C Speaker 21SW152 2000 96 32 1680 7.00 0.31 200 15.0
LaVoce SAN214.50 1700 99 30 1661 5.50 0.28 226 15.5
B&C Speaker 21SW115 4Ω 1700 97 33 1680 7.70 0.37 278 14.0
Eighteen Sound 21NLW9601C 1800 95 38 1660 6.28 0.31 140 14.0
Eighteen Sound 21iD 1800 94 38 1660 5.60 0.24 143 14.0
B&C Speaker 18SW115 8Ω 1700 97 32 1210 5.60 0.32 187 14.0
Celestion NTR21-5010JD 1600 98 30 1663 5.23 0.31 341 9.0
B&C Speaker 18SW115 4Ω 1700 96 34 1210 6.10 0.31 149 14.0

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