Eighteen Sound 21NLW9601 8Ω
4Ω
8Ω
Subwoofer
21″ / 533 mm
Nominal diameter
37 Hz
Resonance
0.29
Q factor
96 dB
Sensitivity
± 14 mm
Linear excursion
3600 W
Program Power
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- Amazon.com
- $$$
- Sensitivity (1W, 1m, infinite baffle)
- SPL1W
- 95.9
- dB
- Frequency response
- 25 - 2000
- Hz
- Resonance frequency (free air)
- fS
- 37.0
- Hz
- Mechanical quality factor
- QMS
- 5.50
- Electrical quality factor
- QES
- 0.31
- Total quality factor
- QTS
- 0.29
- Maximum linear excursion
- xmax
- 14.0
- mm
- Air volume displaced at xmax
- VD
- 2327
- cm³
- Power handling
- P
- 1800
- W
- Program power
- Pmax
- 3600
- W
- Nominal impedance
- Z
- 8
- Ω
- DC resistance
- RE
- 5.9
- Ω
- Inductance (1kHz)
- LE
- 3.1
- mH
- VC Diameter
- 135
- mm
- Winding material
- Copper
- Force factor
- Bl
- 43.0
- N/A
- Motor constant
- Bl/√RE
- 17.7
- N/√W
- Material
- Neodymium
- Effective diameter
- 460
- mm
- Effective area
- SD
- 1662
- cm²
- Moving mass
- MMS
- 408
- g
- Moving mass (without air load)
- MMD
- 360.5
- g
- Material
- Water,UV repellent
- Stiffness
- KMS
- 22.22
- N/mm
- Compliance
- CMS
- 45
- µm/N
- Equivalent volume to the compliance
- VAS
- 175
- L
- Mechanical resistance
- RMS
- 17.25
- N·s/m
- Nominal diameter
- 21
- ″
- 533
- mm
- Overall diameter
- 545
- mm
- Baffle cutout diameter
- 492
- mm
- Overall depth
- 250
- mm
- Flange thickness
- 18
- mm
- Mounting depth
- 232
- mm
- Volume occupied by the driver (estimated)
- 9.2
- L
- Net weight
- 13.5
- kg
Available on (affiliate link)
Specifications
Thiele & Small parameters
Large signal parameters
Voice Coil
Magnet
Diaphragm
Suspensions
Dimensions
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Export this driver to a simulation software:
Closed Box Simulator·
WinISD
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Hornresp
QSpeakers
SpeakerSim
MfbLabs
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