B&C 8FMB51 8 Ω LF Drivers - 8" Woofer 250W to 500W Aluminium Sensitivity 96.5 dB
The FMB series mid-bass woofers from B&C Speakers offer acoustic designers a new range of high efficiency, wide bandwidth alternatives that are not currently available in the B&C range. These full-featured transducers incorporate lower cost ferrite motors, inside/outside wound copper clad aluminum wire voice coils, weatherproof impregnated paper cones, and a symmetrical inductance profile. The FMB Series is especially well suited for two-way loudspeaker enclosures.
Features
- Power Capacity: 500 W continuous program power capacity
- Voice Coil: 51 mm (2 in) aluminium voice coil
- Frequency Response: 67 - 4500 Hz
- Sensitivity: 96.5 dB
- Design: Ventilated voice coil gap for reduced power compression
Specifications
- Nominal Diameter: 200 mm (8.0 in)
- Impedance: 8 Ω
- Minimum Impedance: 5.5 Ω
- Power Handling: 250 W nominal, 500 W continuous
- Frequency Range: 67 - 4500 Hz
- Voice Coil Diameter: 51 mm (2.0 in)
- Winding Material: Aluminium
- Former Material: Glass Fibre
- Magnetic Gap Depth: 8.0 mm (0.31 in)
- Flux Density: 1.19 T
Parameters
- Resonance Frequency: 67 Hz
- Qes: 0.31
- Qms: 3.07
- Qts: 0.28
- Vas: 20.7 dm³ (0.73 ft³)
- Surface Area of Cone (Sd): 227.0 cm² (35.19 in²)
- Xmax: ± 5.5 mm
- Mms: 20.2 g
- Bl: 11.3 Txm
- Le: 0.48 mH
- EBP: 216 Hz
Design
- Surround Shape: Triple Roll
- Cone Shape: Curvilinear
- Magnet Material: Ferrite Ring
- Cone Treatment: Waterproof Impregnated Cone
- Recommended Enclosure: 14.0 dm³ (0.49 ft³)
- Tuning Frequency: 80 Hz
Mounting and Shipping Info
- Overall Diameter: 225 mm (8.86 in)
- Bolt Circle Diameter: 210 mm (8.27 in)
- Baffle Cutout Diameter: 187.0 mm (7.36 in)
- Depth: 92 mm (3.62 in)
- Net Weight: 3.4 kg (7.5 lb)
- Shipping Weight: 3.85 kg (8.49 lb)
- Shipping Box Dimensions: 255x255x150 mm (10.04x10.04x5.91 in)
