Eighteen Sound 18NLW4100
4Ω
8ΩSubwoofer
Nominal diameter | 18″ / 462 mm |
Resonance | 29 Hz |
Q factor | 0.27 |
Sensitivity | 94 dB |
Linear excursion | ± 15 mm |
Program Power | 3000 W |
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- Sensitivity (1W, 1m, infinite baffle) SPL1W 94dB
- Frequency response 30 - 800Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 29Hz
- Mechanical quality factor QMS 11.90
- Electrical quality factor QES 0.28
- Total quality factor QTS 0.27
Large signal parameters
- Maximum linear excursion xmax 15mm
- Air volume displaced at xmax VD 1838cm³
- Power handling P 1500W
- Program power Pmax 3000W
Voice Coil
- Nominal impedance Z 4Ω
- DC resistance RE 2.5Ω
- Inductance (1kHz) LE 1.55mH
- VC Diameter 100mm
Magnet
- Force factor Bl 22.8N/A
- Motor constant Bl/√RE 14.4N/√W
- Material Neodymium
Diaphragm
- Effective diameter 395mm
- Effective area SD 1225cm²
- Moving mass MMS 314g
- Moving mass (without air load) MMD 284g
- Material Weather protected
Suspensions
- Stiffness KMS 10.4N/mm
- Compliance CMS 96µm/N
- Equivalent volume to the compliance VAS 207L
- Mechanical resistance RMS 4.81N·s/m
Dimensions
- Nominal diameter 18″
- 462mm
- Overall diameter 462mm
- Baffle cutout diameter 416mm
- Overall depth 232mm
- Flange thickness 23mm
- Mounting depth 209mm
- Volume occupied by the driver (estimated) 6.5L
- Net weight 10.0kg
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