B&C Speaker 8FMB51
8Ω
16Ω
Woofer
Nominal diameter | 8″ / 200 mm |
Resonance | 68 Hz |
Q factor | 0.39 |
Sensitivity | 93.1 dB |
Linear excursion | ± 5.5 mm |
Program Power | 500 W |
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- Sensitivity (1W, 1m, infinite baffle) SPL1W 93.1dB
- Frequency response 68 - 4500Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 68Hz
- Mechanical quality factor QMS 4.10
- Electrical quality factor QES 0.43
- Total quality factor QTS 0.39
Large signal parameters
- Maximum linear excursion xmax 5.5mm
- Air volume displaced at xmax VD 125cm³
- Power handling P 250W
- Program power Pmax 500W
Voice Coil
- Nominal impedance Z 16Ω
- DC resistance RE 9.8Ω
- Inductance (1kHz) LE 0.83mH
- VC Diameter 51mm
- Winding height HVC 15mm
- Winding material Aluminium
- Former material Glass Fibre
Magnet
- Flux density B 1.19T
- Force factor Bl 13.7N/A
- Motor constant Bl/√RE 4.39N/√W
- Air gap height HAG 8mm
- Material Ferrite
Diaphragm
- Effective diameter 170mm
- Effective area SD 227cm²
- Moving mass MMS 19.7g
- Moving mass (without air load) MMD 17.1g
- Material Waterproof
Suspensions
- Stiffness KMS 3.53N/mm
- Compliance CMS 283µm/N
- Equivalent volume to the compliance VAS 20.5L
- Mechanical resistance RMS 2.05N·s/m
Dimensions
- Nominal diameter 8″
- 200mm
- Overall diameter 225mm
- Baffle cutout diameter 187mm
- Overall depth 92mm
- Flange thickness 9mm
- Mounting depth 83mm
- Volume occupied by the driver 1.1L
- Net weight 3.4kg
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