Eighteen Sound 21NLW9001
4Ω
8ΩSubwoofer
| Nominal diameter | 21″ / 533 mm |
| Resonance | 31 Hz |
| Q factor | 0.34 |
| Sensitivity | 94.6 dB |
| Linear excursion | ± 14 mm |
| Program Power | 3600 W |
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Specifications
- Sensitivity (1W, 1m, infinite baffle) SPL1W 94.6dB
- Frequency response 25 - 1500Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 31Hz
- Mechanical quality factor QMS 4.54
- Electrical quality factor QES 0.37
- Total quality factor QTS 0.34
Large signal parameters
- Maximum linear excursion xmax 14mm
- Air volume displaced at xmax VD 2327cm³
- Power handling P 1800W
- Program power Pmax 3600W
Voice Coil
- Nominal impedance Z 4Ω
- DC resistance RE 2.9Ω
- Inductance (1kHz) LE 2.2mH
- VC Diameter 135mm
Magnet
- Force factor Bl 23.8N/A
- Motor constant Bl/√RE 14N/√W
- Material Neodymium
Diaphragm
- Effective diameter 460mm
- Effective area SD 1662cm²
- Moving mass MMS 375g
- Moving mass (without air load) MMD 328g
- Material Weather protected
Suspensions
- Stiffness KMS 14.3N/mm
- Compliance CMS 70µm/N
- Equivalent volume to the compliance VAS 272L
- Mechanical resistance RMS 16.1N·s/m
Dimensions
- Nominal diameter 21″
- 533mm
- Overall diameter 545mm
- Baffle cutout diameter 492mm
- Overall depth 250mm
- Flange thickness 18mm
- Mounting depth 232mm
- Volume occupied by the driver (estimated) 9.1L
- Net weight 13.4kg
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Export this driver to a simulation software:
Closed Box Simulator·
Speakerbench
WinISD
Basta!
Hornresp
QSpeakers
SpeakerSim
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