Eighteen Sound 18NTLW5000
4Ω
8ΩSubwoofer
Nominal diameter | 18″ / 462 mm |
Resonance | 32 Hz |
Q factor | 0.30 |
Sensitivity | 94 dB |
Linear excursion | ± 17.5 mm |
Program Power | 4000 W |
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- Sensitivity (1W, 1m, infinite baffle) SPL1W 94dB
- Frequency response 35 - 1000Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 32Hz
- Mechanical quality factor QMS 9.50
- Electrical quality factor QES 0.31
- Total quality factor QTS 0.30
Large signal parameters
- Maximum linear excursion xmax 17.5mm
- Air volume displaced at xmax VD 2144cm³
- Power handling P 1800W
- Program power Pmax 4000W
Voice Coil
- Nominal impedance Z 4Ω
- DC resistance RE 3.1Ω
- Inductance (1kHz) LE 1.23mH
- VC Diameter 115mm
- Winding material Aluminum
Magnet
- Force factor Bl 25N/A
- Motor constant Bl/√RE 14.2N/√W
Diaphragm
- Effective diameter 395mm
- Effective area SD 1225cm²
- Moving mass MMS 306g
- Moving mass (without air load) MMD 276g
- Material Water,UV repellent
Suspensions
- Stiffness KMS 12.3N/mm
- Compliance CMS 81µm/N
- Equivalent volume to the compliance VAS 165L
- Mechanical resistance RMS 6.48N·s/m
Dimensions
- Nominal diameter 18″
- 462mm
- Overall diameter 462mm
- Baffle cutout diameter 416mm
- Overall depth 310mm
- Flange thickness 26mm
- Mounting depth 284mm
- Volume occupied by the driver (estimated) 8.8L
- Net weight 12.0kg
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