Eighteen Sound 21NLW4100
4Ω
8ΩSubwoofer
Nominal diameter | 21″ / 533 mm |
Resonance | 34 Hz |
Q factor | 0.40 |
Sensitivity | 94.4 dB |
Linear excursion | ± 15.2 mm |
Program Power | 3000 W |
.png)
.png)
- Sensitivity (1W, 1m, infinite baffle) SPL1W 94.4dB
- Frequency response 32 - 300Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 34Hz
- Mechanical quality factor QMS 7.80
- Electrical quality factor QES 0.42
- Total quality factor QTS 0.40
Large signal parameters
- Maximum linear excursion xmax 15.2mm
- Air volume displaced at xmax VD 2525cm³
- Power handling P 1500W
- Program power Pmax 3000W
Voice Coil
- Nominal impedance Z 4Ω
- DC resistance RE 2.6Ω
- Inductance (1kHz) LE 1.5mH
- VC Diameter 100mm
- Winding height HVC 36.5mm
- Winding material Copper
Magnet
- Force factor Bl 22.8N/A
- Motor constant Bl/√RE 14.1N/√W
- Air gap height HAG 12.4mm
- Material Neodymium
Diaphragm
- Effective diameter 460mm
- Effective area SD 1661cm²
- Moving mass MMS 400g
- Moving mass (without air load) MMD 353g
- Material Water repellent
Suspensions
- Stiffness KMS 18.2N/mm
- Compliance CMS 55µm/N
- Equivalent volume to the compliance VAS 219L
- Mechanical resistance RMS 11N·s/m
Dimensions
- Nominal diameter 21″
- 533mm
- Overall diameter 545mm
- Baffle cutout diameter 492mm
- Overall depth 247mm
- Flange thickness 7mm
- 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·





