B&C 6MBX44 6.5″ Professional Mid-Bass LF Driver
The B&C 6MBX44 is a professional 6.5-inch mid-bass LF driver engineered for applications requiring high efficiency, lightweight construction, and extended bandwidth from compact enclosure designs. Developed as part of B&C’s MBX series, the B&C 6MBX44 combines a lightweight neodymium motor structure with advanced moving components to deliver strong mid-bass performance, excellent transient response, and controlled frequency reproduction across demanding professional applications.
Designed specifically for compact two-way loudspeaker systems, portable PA cabinets, stage monitors, and high-performance installed sound reinforcement systems, the B&C 6MBX44 provides strong output capability while maintaining very low weight. Its combination of high sensitivity, compact loading requirements, and extended bandwidth makes it particularly suitable for system designers looking to maximize performance from smaller enclosure volumes.
Key Features
- 200 W nominal power handling
- 400 W continuous program power capacity
- 44 mm (1.7 inch) aluminium voice coil
- 98 dB sensitivity
- 115 Hz – 5000 Hz frequency response
- Lightweight neodymium ring magnet assembly
- Aluminium demodulation ring for reduced distortion
- Waterproof impregnated cone treatment
- Triple roll surround geometry
- Optimized for compact two-way loudspeaker systems
Lightweight Neodymium Motor Design
The B&C 6MBX44 utilizes a neodymium ring magnet motor assembly, allowing the driver to maintain extremely low weight while preserving strong magnetic performance. This lightweight motor structure makes the driver especially suitable for portable loudspeaker systems and compact installations where minimizing total system mass remains important.
An integrated aluminium demodulation ring helps reduce inductance variation and lowers distortion throughout the operating bandwidth. By stabilizing inductance characteristics, the driver maintains smoother response characteristics and improved mid-bass clarity during higher output operation.
The motor structure generates approximately 1.55 T flux density, providing strong control over cone movement while maintaining efficient acoustic output. Combined with an 11.7 Tm BL factor, the magnetic system contributes to accurate transient response and controlled behavior throughout the intended operating range.
Voice Coil Construction and Thermal Stability
At the center of the B&C 6MBX44 is a 44 mm aluminium voice coil wound on a glass fibre former. This construction reduces moving mass while maintaining sufficient thermal stability for demanding professional applications. Lower moving mass contributes directly to improved transient performance and higher efficiency.
The driver supports 200 W nominal power handling and 400 W continuous program power capacity, allowing it to maintain strong output performance in compact professional loudspeaker systems. The optimized voice coil geometry contributes to stable thermal behavior during prolonged operation.
The lightweight moving assembly and efficient thermal design make the driver particularly effective in systems requiring strong output while preserving fast dynamic response.
Cone Geometry and Suspension Design
The B&C 6MBX44 utilizes an exponential cone profile combined with a triple roll surround geometry, optimized for controlled cone movement and improved linearity across the operating bandwidth. This suspension design allows the driver to maintain efficient output while preserving transient accuracy.
A single spider suspension system maintains mechanical stability while supporting predictable movement characteristics. Combined with the optimized motor structure, the suspension contributes to controlled mid-bass reproduction and improved vocal articulation when used in two-way systems.
The cone assembly incorporates a waterproof impregnated cone treatment, improving environmental resistance and enhancing durability for both portable and installed sound reinforcement applications.
Compact Enclosure Integration
One of the primary advantages of the B&C 6MBX44 is its suitability for extremely compact enclosure designs.
The manufacturer recommends a 3 dm³ enclosure volume with a 120 Hz tuning frequency, allowing designers to create compact loudspeaker systems while maintaining strong output capability and efficient acoustic loading. These characteristics make the driver especially well suited for compact two-way loudspeaker applications.
Typical applications include:
- Compact two-way loudspeaker systems
- Professional stage monitors
- Portable PA systems
- Compact bass reflex cabinets
- Installed sound reinforcement systems
- High-output mid-bass applications
Technical Specifications
Nominal Diameter: 170 mm (6.5 in)
Nominal Impedance: 8 Ω
Minimum Impedance: 6 Ω
Nominal Power Handling: 200 W
Continuous Program Power: 400 W
Sensitivity: 98 dB
Frequency Range: 115 Hz – 5000 Hz
Voice Coil Diameter: 44 mm (1.7 in)
Winding Material: Aluminium
Former Material: Glass Fibre
Winding Depth: 10 mm
Magnetic Gap Depth: 6 mm
Flux Density: 1.55 T
Magnet Material: Neodymium Ring
Cone Shape: Exponential
Surround Shape: Triple Roll
Spider Design: Single
Pole Design: T-Pole
Cone Treatment: Waterproof Impregnated Cone
Recommended Enclosure: 3 dm³
Recommended Tuning: 120 Hz
Thiele-Small Parameters
Fs: 113 Hz
Re: 5.4 Ω
Qes: 0.34
Qms: 3.9
Qts: 0.31
Vas: 4.1 dm³
Sd: 132 cm²
η₀: 1.4 %
Xmax: 3.5 mm
Xvar: 3 mm
Mms: 12 g
BL Factor: 11.7 Tm
Le: 0.2 mH
EBP: 332 Hz
Mounting Information
Overall Diameter: 187 mm
Bolt Circle Diameter: 172 mm
Baffle Cutout Diameter: 145 mm
Depth: 87 mm
Flange and Gasket Thickness: 11 mm
Air Volume Occupied by Driver: 0.6 dm³
Net Weight: 1.59 kg
Shipping Weight: 1.79 kg
Shipping Box: 210 × 210 × 125 mm
Recone Kit: RCK06MBX448
Applications
The B&C 6MBX44 is engineered for professional mid-bass applications where compact loading, lightweight construction, and high sensitivity are priorities. Its neodymium motor structure, low distortion design, and compact enclosure compatibility make it particularly suitable for portable PA systems, stage monitors, two-way loudspeaker systems, and professional installed audio applications.
For system designers requiring a lightweight professional mid-bass driver optimized for compact enclosures and efficient output performance, the B&C 6MBX44 provides an effective balance of sensitivity, low weight, and professional-grade reliability.
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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.
