SB Acoustics SB20PFCR30-4
4Ω
8ΩWoofer
| Nominal diameter | 8″ / 203 mm |
| Resonance | 34 Hz |
| Q factor | 0.33 |
| Sensitivity | 89.7 dB |
| Linear excursion | ± 5.8 mm |
| Program Power | 100 W |
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Specifications
- Sensitivity (1W, 1m, infinite baffle) SPL1W 89.7dB
Thiele & Small parameters
- Resonance frequency (free air) fS 34Hz
- Mechanical quality factor QMS 2.78
- Electrical quality factor QES 0.37
- Total quality factor QTS 0.33
Large signal parameters
- Maximum linear excursion xmax 5.8mm
- Air volume displaced at xmax VD 124cm³
- Power handling P 50W
- Program power Pmax 100W
Voice Coil
- Nominal impedance Z 4Ω
- DC resistance RE 3.4Ω
- Inductance (1kHz) LE 0.71mH
- VC Diameter 30.5mm
- Winding height HVC 16.5mm
Magnet
- Flux density B 1.2T
- Force factor Bl 6.6N/A
- Motor constant Bl/√RE 3.58N/√W
- Air gap height HAG 5mm
- Weight 0.54kg
Diaphragm
- Effective diameter 166mm
- Effective area SD 216cm²
- Moving mass MMS 22.4g
- Moving mass (without air load) MMD 20.1g
- Material Natural fibers (made in-house)
Suspensions
- Stiffness KMS 1N/mm
- Compliance CMS 1000µm/N
- Equivalent volume to the compliance VAS 66.2L
- Mechanical resistance RMS 1.7N·s/m
- Surround material Rubber
Dimensions
- Nominal diameter 8″
- 203mm
- Volume occupied by the driver (estimated) 0.57L
- Net weight 1.42kg
- Frame material Reinforced plastic
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Export this driver to a simulation software:
Closed Box Simulator·
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WinISD
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Hornresp
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