SICA 18 PFS 4
4Ω
Subwoofer
Nominal diameter | 18″ / 463 mm |
Resonance | 29 Hz |
Q factor | 0.33 |
Sensitivity | 93.6 dB |
Linear excursion | ± 9 mm |
Program Power | 2400 W |
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- Sensitivity (1W, 1m, infinite baffle) SPL1W 93.6dB
- Frequency response 30 - 2000Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 29Hz
- Mechanical quality factor QMS 5.30
- Electrical quality factor QES 0.35
- Total quality factor QTS 0.33
Large signal parameters
- Maximum linear excursion xmax 9mm
- Air volume displaced at xmax VD 1048cm³
- Power handling P 1200W
- Program power Pmax 2400W
Voice Coil
- Nominal impedance Z 4Ω
- DC resistance RE 3.1Ω
- Inductance (1kHz) LE 1.38mH
- VC Diameter 100mm
- Winding height HVC 12mm
- Winding material Copper
- Former material Glass Fiber
Magnet
- Flux density B 1.05T
- Force factor Bl 19.7N/A
- Motor constant Bl/√RE 11.2N/√W
- Weight 3.3kg
- Material Ferrite
Diaphragm
- Effective diameter 385mm
- Effective area SD 1164cm²
- Moving mass MMS 238g
- Moving mass (without air load) MMD 210g
- Material Paper
Suspensions
- Stiffness KMS 7.94N/mm
- Compliance CMS 126µm/N
- Equivalent volume to the compliance VAS 242L
- Mechanical resistance RMS 8.19N·s/m
- Surround material Treated Cloth
Dimensions
- Nominal diameter 18″
- 463mm
- Overall diameter 462mm
- Baffle cutout diameter 417mm
- Overall depth 210mm
- Volume occupied by the driver (estimated) 7.2L
- Net weight 13.0kg
- Frame material Aluminium Die-Cast
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