SB Acoustics SB23NBACS45-8
4Ω
8Ω
Woofer
Nominal diameter | 8″ / 203 mm |
Resonance | 25 Hz |
Q factor | 0.40 |
Sensitivity | 86.4 dB |
Linear excursion | ± 6.5 mm |
Program Power | 120 W |
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- Sensitivity (1W, 1m, infinite baffle) SPL1W 86.4dB
Thiele & Small parameters
- Resonance frequency (free air) fS 25Hz
- Mechanical quality factor QMS 5.54
- Electrical quality factor QES 0.43
- Total quality factor QTS 0.40
Large signal parameters
- Maximum linear excursion xmax 6.5mm
- Air volume displaced at xmax VD 140cm³
- Power handling P 60W
- Program power Pmax 120W
Voice Coil
- Nominal impedance Z 8Ω
- DC resistance RE 5.7Ω
- Inductance (1kHz) LE 0.37mH
- VC Diameter 45.5mm
- Winding height HVC 19mm
- Winding material Copper Clad Aluminium
- Former material Glass Fiber
Magnet
- Flux density B 0.9T
- Force factor Bl 7.9N/A
- Motor constant Bl/√RE 3.31N/√W
- Air gap height HAG 6mm
- Weight 0.8kg
Diaphragm
- Effective diameter 166mm
- Effective area SD 216cm²
- Moving mass MMS 31.2g
- Moving mass (without air load) MMD 28.9g
- Material Aluminium
Suspensions
- Stiffness KMS 0.699N/mm
- Compliance CMS 1430µm/N
- Equivalent volume to the compliance VAS 93.4L
- Mechanical resistance RMS 0.8N·s/m
- Surround material Rubber
Dimensions
- Nominal diameter 8″
- 203mm
- Volume occupied by the driver (estimated) 1.1L
- Net weight 2.7kg
- Frame material Cast aluminium
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