Eighteen Sound 18NLTW4500
8Ω
Subwoofer
Nominal diameter | 18″ / 462 mm |
Resonance | 35 Hz |
Q factor | 0.33 |
Sensitivity | 94.1 dB |
Linear excursion | ± 15.3 mm |
Program Power | 3600 W |
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- Sensitivity (1W, 1m, infinite baffle) SPL1W 94.1dB
- Frequency response 30 - 1000Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 35Hz
- Mechanical quality factor QMS 9.70
- Electrical quality factor QES 0.34
- Total quality factor QTS 0.33
Large signal parameters
- Maximum linear excursion xmax 15.3mm
- Air volume displaced at xmax VD 1836cm³
- Power handling P 1800W
- Program power Pmax 3600W
Voice Coil
- Nominal impedance Z 8Ω
- DC resistance RE 5.0Ω
- Inductance (1kHz) LE 2mH
- VC Diameter 115mm
Magnet
- Force factor Bl 30.3N/A
- Motor constant Bl/√RE 13.6N/√W
- Material Neodymium
Diaphragm
- Effective diameter 391mm
- Effective area SD 1200cm²
- Moving mass MMS 286g
- Moving mass (without air load) MMD 257g
- Material Weather protected
Suspensions
- Stiffness KMS 13.5N/mm
- Compliance CMS 74µm/N
- Equivalent volume to the compliance VAS 151L
- Mechanical resistance RMS 6.48N·s/m
Dimensions
- Nominal diameter 18″
- 462mm
- Overall diameter 462mm
- Baffle cutout diameter 422mm
- Overall depth 233mm
- Flange thickness 23mm
- Mounting depth 210mm
- Volume occupied by the driver (estimated) 7.3L
- Net weight 12.0kg
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