B&C 8FG64 8″ Professional Subwoofer LF Driver
The B&C 8FG64 is a professional 8-inch subwoofer and low-frequency driver engineered for compact high-output applications where extended low-frequency performance, controlled excursion capability, and strong thermal stability are required. Designed around a ferrite motor structure with advanced inductance control and cooling technologies, the B&C 8FG64 is optimized for compact vented enclosures where cabinet size must remain small without sacrificing low-frequency performance.
Developed for compact subwoofer systems, portable PA cabinets, professional two-way loudspeaker systems, and installed audio applications, the B&C 8FG64 combines substantial power handling with carefully optimized moving mass and suspension geometry. Its compact loading characteristics allow system designers to achieve strong low-frequency output from smaller enclosure volumes while maintaining predictable integration into professional sound reinforcement systems.
Key Features
- 300 W nominal power handling
- 600 W continuous program power capacity
- 64 mm (2.5 inch) copper voice coil
- Ferrite magnet motor structure
- 92 dB sensitivity
- 50 Hz – 3000 Hz frequency response
- Aluminium demodulating ring for reduced distortion
- WP waterproof front cone treatment
- Compact enclosure optimization
- Designed for compact subwoofer applications
Ferrite Motor Design and Distortion Control
The B&C 8FG64 utilizes a ferrite motor assembly engineered to maintain stable magnetic performance during sustained operation. Ferrite motor systems remain widely used throughout professional audio because of their predictable thermal behavior and long-term reliability under demanding conditions.
A major design feature is the integrated aluminium demodulating ring, which helps reduce inductance variation and lower distortion throughout the operating range. By minimizing modulation effects within the motor structure, the driver maintains cleaner low-frequency reproduction while improving system integration in compact loudspeaker designs.
With a measured 0.9 T flux density, the motor structure provides effective control over cone movement while supporting efficient power transfer to the moving assembly. The result is controlled low-frequency performance from compact cabinet volumes.
Voice Coil Construction and Thermal Performance
At the center of the B&C 8FG64 is a 64 mm copper voice coil wound on a glass fibre former. This construction provides thermal stability while maintaining the structural rigidity required for continuous high-output operation.
The driver supports 300 W nominal power handling and 600 W continuous program power, making it suitable for professional applications where sustained output capability is required. Combined with the large voice coil diameter, the thermal design helps maintain stable performance during extended operation.
The moving assembly has been optimized to balance excursion capability with cone control, contributing to low-frequency performance while maintaining predictable behavior across the operating bandwidth.
Cone Geometry and Suspension Design
The B&C 8FG64 utilizes a radial cone profile paired with a roll surround geometry. This configuration supports controlled cone motion while allowing the excursion required for compact low-frequency applications.
A single spider suspension system provides mechanical stability while maintaining predictable movement characteristics during higher excursion operation. The suspension geometry works together with the motor structure to support compact subwoofer designs where cone control is critical.
The cone assembly incorporates WP waterproof front-side treatment, helping improve resistance to humidity and environmental exposure in portable and installed sound reinforcement systems.
Compact Enclosure Loading and System Integration
One of the major advantages of the B&C 8FG64 is its ability to provide useful low-frequency extension from compact cabinet volumes.
The manufacturer recommends a 16 dm³ enclosure volume with a 50 Hz tuning frequency, making the driver particularly suitable for compact bass reflex and small-format subwoofer designs. These loading characteristics provide flexibility for designers working with strict space limitations.
Typical applications include:
- Compact subwoofer systems
- Portable PA loudspeakers
- Compact bass reflex cabinets
- Two-way professional loudspeaker systems
- Installed audio systems
- Small-format low-frequency reinforcement systems
Technical Specifications
Nominal Diameter: 200 mm (8 in)
Nominal Impedance: 8 Ω
Minimum Impedance: 6.7 Ω
Nominal Power Handling: 300 W
Continuous Program Power: 600 W
Sensitivity: 92 dB
Frequency Range: 50 Hz – 3000 Hz
Voice Coil Diameter: 64 mm (2.5 in)
Winding Material: Copper
Former Material: Glass Fibre
Winding Depth: 19 mm
Magnetic Gap Depth: 10 mm
Flux Density: 0.9 T
Magnet Material: Ferrite
Cone Shape: Radial
Surround Shape: Roll
Spider Design: Single
Pole Design: T-Pole
Woofer Cone Treatment: WP Waterproof Front Side
Recommended Enclosure: 16 dm³
Recommended Tuning: 50 Hz
Thiele-Small Parameters
Fs: 51 Hz
Re: 5.8 Ω
Qes: 0.32
Qms: 10.1
Qts: 0.31
Vas: 15 dm³
Sd: 220 cm²
η₀: 0.7 %
Xmax: 7 mm
Xvar: 8 mm
Mms: 41 g
BL Factor: 15.8 Tm
Le: 1.7 mH
EBP: 159 Hz
Mounting Information
Overall Diameter: 225 mm
Bolt Circle Diameter: 210 mm
Baffle Cutout Diameter: 187 mm
Depth: 100 mm
Flange and Gasket Thickness: 9 mm
Air Volume Occupied by Driver: 1.5 dm³
Net Weight: 4 kg
Shipping Weight: 4.45 kg
Shipping Box: 255 × 255 × 150 mm
Recone Kit: RCK008FG648
Applications
The B&C 8FG64 is engineered for professional low-frequency applications where compact dimensions, strong power handling, and extended low-frequency capability are required. Its combination of compact enclosure loading, controlled excursion behavior, and distortion reduction technologies makes it suitable for compact subwoofers, portable sound systems, installed audio, and professional loudspeaker systems requiring efficient low-frequency reproduction.
For system designers looking for a compact professional subwoofer driver optimized for small enclosures and reliable long-term operation, the B&C 8FG64 provides a strong balance of power handling, low-frequency performance, and installation flexibility.
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About B&C Speakers S.r.L.
B&C Speakers products are built in Bagno a Ripoli (Florence), Italy., ensuring high quality products to suite your speaker building requirements. Their 10,500 square meter facility incorporates highly sophisticated automation and quality control. Over the years they become one of the world leaders in the Professional Audio market, a brand recognized everywhere as a premium product that offers excellent value to the consumer.
