Eighteen Sound 21NTLW5000 8Ω
4Ω
8Ω
Subwoofer
| Nominal diameter | 21″ / 533 mm |
| Resonance | 31 Hz |
| Q factor | 0.36 |
| Sensitivity | 94.7 dB |
| Linear excursion | ± 17.5 mm |
| Program power | 4000 W |
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Specifications
- Sensitivity (1W, 1m, infinite baffle) SPL1W 94.7dB
- Frequency response 30 - 1800Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 31Hz
- Mechanical quality factor QMS 5.20
- Electrical quality factor QES 0.38
- Total quality factor QTS 0.36
Large signal parameters
- Maximum linear excursion (one way) xmax 17.5mm
- Air volume displaced at xmax VD 2909cm³
- Power handling P 1800W
- Program power Pmax 4000W
Voice Coil
- Nominal impedance Z 8Ω
- DC resistance RE 5.3Ω
- Inductance (1kHz) LE 1.6mH
- VC Diameter 115mm
- Winding height HVC 42.5mm
Magnet
- Force factor Bl 32N/A
- Motor constant Bl/√RE 13.9N/√W
- Air gap height HAG 15mm
- Material Neodymium
Diaphragm
- Effective diameter 460mm
- Effective area SD 1662cm²
- Moving mass (including air load) MMS 372g
- Moving mass MMD 325g
Suspensions
- Stiffness KMS 14.1N/mm
- Compliance CMS 71µm/N
- Equivalent volume to the compliance VAS 270L
- Mechanical resistance RMS 13.9N·s/m
Dimensions
- Nominal diameter 21″
- 533mm
- Overall diameter 545mm
- Baffle cutout diameter 492mm
- Overall depth 320mm
- Flange thickness 18mm
- Mounting depth 302mm
- Volume occupied by the driver (estimated) 10L
- Net weight 12.5kg
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Export this driver to a box design software:
Closed Box Simulator·
Speakerbench
WinISD
Basta!
Hornresp
QSpeakers
SpeakerSim
MfbLabs
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