Eighteen Sound 21NLW4100 8Ω
4Ω
8Ω
Subwoofer
| Nominal diameter | 21″ / 533 mm |
| Resonance | 36 Hz |
| Q factor | 0.46 |
| Sensitivity | 94.2 dB |
| Linear excursion | ± 15.2 mm |
| Program Power | 3000 W |
.png)
.png)
Specifications
- Sensitivity (1W, 1m, infinite baffle) SPL1W 94.2dB
- Frequency response 32 - 300Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 36Hz
- Mechanical quality factor QMS 7.80
- Electrical quality factor QES 0.49
- Total quality factor QTS 0.46
Large signal parameters
- Maximum linear excursion (one way) xmax 15.2mm
- Air volume displaced at xmax VD 2525cm³
- Power handling P 1500W
- Program power Pmax 3000W
Voice Coil
- Nominal impedance Z 8Ω
- DC resistance RE 5.1Ω
- Inductance (1kHz) LE 2.1mH
- VC Diameter 100mm
- Winding height HVC 36.5mm
- Winding material Copper
Magnet
- Force factor Bl 29.4N/A
- Motor constant Bl/√RE 13N/√W
- Air gap height HAG 12.4mm
- Material Neodymium
Diaphragm
- Effective diameter 460mm
- Effective area SD 1661cm²
- Moving mass MMS 374g
- Moving mass (without air load) MMD 327g
- Material Water repellent
Suspensions
- Stiffness KMS 19.2N/mm
- Compliance CMS 52µm/N
- Equivalent volume to the compliance VAS 210L
- Mechanical resistance RMS 10.9N·s/m
Dimensions
- Nominal diameter 21″
- 533mm
- Overall diameter 545mm
- Baffle cutout diameter 492mm
- Overall depth 245mm
- Flange thickness 24mm
- Mounting depth 240mm
- Volume occupied by the driver (estimated) 7.7L
- Net weight 10.5kg
.gif)
.gif)
.png)
Export this driver to a simulation software:
Closed Box Simulator·
Speakerbench
WinISD
Basta!
Hornresp
QSpeakers
SpeakerSim
MfbLabs.png.webp)
.png.webp)
.jpg.webp)