Eighteen Sound 21NTLW5000 8Ω
4Ω
8Ω
Subwoofer
21″ / 533 mm
Nominal diameter
31 Hz
Resonance
0.36
Q factor
95 dB
Sensitivity
± 17.5 mm
Linear excursion
4000 W
Program Power
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- Amazon.com
- $$$
- Sensitivity (1W, 1m, infinite baffle)
- SPL1W
- 94.7
- dB
- Frequency response
- 30 - 1800
- Hz
- Resonance frequency (free air)
- fS
- 31.0
- Hz
- Mechanical quality factor
- QMS
- 5.20
- Electrical quality factor
- QES
- 0.38
- Total quality factor
- QTS
- 0.36
- Maximum linear excursion
- xmax
- 17.5
- mm
- Air volume displaced at xmax
- VD
- 2909
- cm³
- Power handling
- P
- 1800
- W
- Program power
- Pmax
- 4000
- W
- Nominal impedance
- Z
- 8
- Ω
- DC resistance
- RE
- 5.3
- Ω
- Inductance (1kHz)
- LE
- 1.6
- mH
- VC Diameter
- 115
- mm
- Winding height
- HVC
- 42.5
- mm
- Force factor
- Bl
- 32.0
- N/A
- Motor constant
- Bl/√RE
- 13.9
- N/√W
- Air gap height
- HAG
- 15
- mm
- Material
- Neodymium
- Effective diameter
- 460
- mm
- Effective area
- SD
- 1662
- cm²
- Moving mass
- MMS
- 372
- g
- Moving mass (without air load)
- MMD
- 324.5
- g
- Stiffness
- KMS
- 14.09
- N/mm
- Compliance
- CMS
- 71
- µm/N
- Equivalent volume to the compliance
- VAS
- 270
- L
- Mechanical resistance
- RMS
- 13.93
- N·s/m
- Nominal diameter
- 21
- ″
- 533
- mm
- Overall diameter
- 545
- mm
- Baffle cutout diameter
- 492
- mm
- Overall depth
- 320
- mm
- Flange thickness
- 18
- mm
- Mounting depth
- 302
- mm
- Volume occupied by the driver (estimated)
- 10.0
- L
- Net weight
- 12.5
- 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
Basta!
Hornresp
QSpeakers
SpeakerSim
MfbLabs
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