Ciare NDH18-4S
4Ω
8ΩSubwoofer
Nominal diameter | 18″ / 450 mm |
Resonance | 31 Hz |
Q factor | 0.25 |
Sensitivity | 95.3 dB |
Linear excursion | ± 11.5 mm |
Program Power | 2000 W |
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- Sensitivity (1W, 1m, infinite baffle) SPL1W 95.3dB
Thiele & Small parameters
- Resonance frequency (free air) fS 31Hz
- Mechanical quality factor QMS 9.80
- Electrical quality factor QES 0.25
- Total quality factor QTS 0.25
Large signal parameters
- Maximum linear excursion xmax 11.5mm
- Air volume displaced at xmax VD 1339cm³
- Power handling P 1000W
- Program power Pmax 2000W
Voice Coil
- Nominal impedance Z 4Ω
- DC resistance RE 3.0Ω
- Inductance (1kHz) LE 1.7mH
- VC Diameter 100mm
- Winding height HVC 30mm
Magnet
- Force factor Bl 22.2N/A
- Motor constant Bl/√RE 12.8N/√W
- Air gap height HAG 14mm
Diaphragm
- Effective diameter 385mm
- Effective area SD 1164cm²
- Moving mass MMS 216g
- Moving mass (without air load) MMD 193g
- Material Treated Cellulose
Suspensions
- Stiffness KMS 8N/mm
- Compliance CMS 125µm/N
- Equivalent volume to the compliance VAS 240L
- Mechanical resistance RMS 4.29N·s/m
- Spider material Nomex Fabric
Dimensions
- Nominal diameter 18″
- 450mm
- Overall diameter 388mm
- Baffle cutout diameter 354mm
- Overall depth 208mm
- Flange thickness 13mm
- Mounting depth 195mm
- Volume occupied by the driver (estimated) 4.7L
- Net weight 8.0kg
- Frame material Diecast Aluminium
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Export this driver to a simulation software:
Closed Box Simulator·





