B&C FBCLX64 Passive Crossover Network for 12CLX64 Coaxial Loudspeakers
The B&C FBCLX64 is a purpose-built passive crossover network specifically designed for the B&C 12CLX64 coaxial loudspeaker and the recommended CX12.64 enclosure design. Developed by B&C Speakers to provide seamless integration between the low-frequency and high-frequency sections of the 12CLX64, this crossover network eliminates the guesswork involved in crossover design and delivers factory-optimised performance for professional coaxial loudspeaker systems.
In any coaxial loudspeaker, the crossover network plays a critical role in determining overall sound quality, phase coherence, frequency response consistency, and long-term reliability. The B&C FBCLX64 has been engineered to ensure that the individual components within the 12CLX64 work together as a unified acoustic source, providing the smooth frequency transition, accurate imaging, and controlled dispersion that professional audio applications demand.
Unlike generic crossover solutions that require extensive testing and tuning to achieve acceptable results, the B&C FBCLX64 has been specifically matched to the acoustic and electrical characteristics of the 12CLX64 coaxial driver. Every aspect of the crossover design has been optimised by B&C engineers to maximise performance, making it the ideal choice for OEM manufacturers, loudspeaker builders, installers, and audio professionals seeking predictable results and exceptional sound quality.
Featuring a 1.7 kHz crossover frequency, carefully selected filter slopes, and a robust passive design, the B&C FBCLX64 ensures accurate integration between the coaxial woofer and compression driver sections. The result is a highly coherent point-source loudspeaker system capable of delivering natural vocals, detailed midrange reproduction, smooth high-frequency performance, and outstanding intelligibility across a wide range of professional audio environments.
Whether used in stage monitoring systems, portable PA loudspeakers, fixed installations, houses of worship, corporate venues, or high-performance coaxial speaker projects, the B&C FBCLX64 provides a reliable and professionally engineered solution that helps unlock the full potential of the renowned B&C 12CLX64 coaxial transducer.
Purpose-Built for the B&C 12CLX64 Coaxial Driver
The B&C FBCLX64 has been specifically developed for one purpose: delivering optimal crossover integration for the B&C 12CLX64 coaxial loudspeaker.
The 12CLX64 combines a powerful 12-inch low-frequency transducer with a centrally mounted high-frequency compression driver, creating a true point-source loudspeaker capable of exceptional phase coherence and uniform dispersion characteristics.
However, achieving the full benefits of a coaxial design depends heavily on the crossover network used.
The FBCLX64 ensures that both sections operate together as intended by the manufacturer, providing:
- Smooth frequency transition
- Consistent phase response
- Improved acoustic summation
- Enhanced speech intelligibility
- Accurate tonal balance
- Superior imaging characteristics
- Uniform coverage throughout the listening area
By using the crossover network specifically engineered for the driver, loudspeaker designers can avoid the compromises often associated with generic passive crossover solutions.
Optimised for the CX12.64 Recommended Cabinet Design
One of the key advantages of the B&C FBCLX64 is its compatibility with the CX12.64 suggested enclosure design.
B&C developed the crossover and enclosure concept together, ensuring that the driver, cabinet, and crossover network function as a complete system.
This integrated design approach delivers numerous advantages:
Improved Acoustic Performance
The crossover complements the acoustic loading characteristics of the recommended enclosure.
Predictable Results
Builders can achieve performance that closely matches B&C’s intended design goals.
Faster Development
Manufacturers and DIY builders can significantly reduce design and testing time.
Reliable Integration
The crossover network has already been optimised for the driver’s operating characteristics.
Professional Sound Quality
The combination of the FBCLX64 and CX12.64 enclosure design creates a refined and balanced loudspeaker system suitable for demanding professional applications.
For builders seeking a proven coaxial loudspeaker solution, the FBCLX64 provides a factory-developed foundation that helps ensure successful results.
1.7 kHz Crossover Frequency for Smooth Driver Integration
At the heart of the B&C FBCLX64 is a carefully selected crossover frequency of:
1.7 kHz
This crossover point has been engineered to provide an optimal transition between the low-frequency and high-frequency sections of the 12CLX64.
The crossover frequency directly affects how seamlessly both driver sections blend together.
A properly selected crossover point provides:
Natural Vocal Reproduction
Vocals transition smoothly between frequency sections without audible discontinuities.
Improved Midrange Clarity
Critical speech frequencies remain balanced and intelligible.
Better Driver Protection
Each section operates within its most efficient frequency range.
Enhanced Tonal Accuracy
The crossover helps preserve the natural character of the source material.
Consistent Directivity
The transition between drivers occurs in a region where dispersion characteristics remain well controlled.
The result is a loudspeaker capable of delivering detailed, balanced, and highly intelligible audio across a wide range of applications.
Advanced Filter Slopes for Accurate Acoustic Summation
The B&C FBCLX64 employs carefully engineered filter slopes of:
- 24 dB/octave
- 12 dB/octave
This combination of crossover slopes helps optimise the acoustic relationship between the low-frequency and high-frequency sections of the coaxial driver.
Filter slopes play an important role in determining how frequencies are divided between drivers and how smoothly they combine through the crossover region.
The selected slopes provide several advantages:
Reduced Driver Overlap
Minimises unwanted interaction between frequency sections.
Improved Phase Alignment
Helps maintain coherent summation across the crossover region.
Increased Clarity
Reduces potential interference that can affect vocal and instrumental reproduction.
Better Driver Protection
Steeper slopes limit unwanted frequencies from reaching sensitive components.
Enhanced System Reliability
Supports long-term performance by ensuring each driver section operates within its intended range.
The result is a cleaner, more controlled acoustic presentation with improved overall system performance.
Point-Source Performance Advantages
The B&C 12CLX64, when paired with the FBCLX64 crossover, benefits from the inherent advantages of coaxial loudspeaker technology.
Because both low-frequency and high-frequency sections share a common acoustic axis, the system behaves much like a single sound source.
This provides several important benefits.
Consistent Coverage
Listeners experience more uniform frequency response throughout the coverage area.
Superior Imaging
The point-source design improves localisation and spatial accuracy.
Improved Phase Coherence
The acoustic centres of both driver sections remain closely aligned.
Better Monitor Performance
Coaxial systems often excel in stage monitoring applications due to their symmetrical coverage patterns.
Enhanced Speech Intelligibility
Accurate summation contributes to improved vocal clarity and articulation.
The FBCLX64 crossover is specifically engineered to preserve and enhance these advantages.
Ideal Applications for the B&C FBCLX64
The B&C FBCLX64 is suitable for a wide range of professional loudspeaker applications.
Typical uses include:
Professional Stage Monitors
Coaxial designs provide excellent coverage consistency for performers.
Portable PA Systems
Compact point-source loudspeakers benefit from coherent dispersion and excellent vocal clarity.
Houses of Worship
High intelligibility and even coverage make coaxial systems ideal for speech reinforcement.
Corporate AV Systems
Clear speech reproduction is critical in conference and presentation environments.
Fixed Installations
Reliable passive operation simplifies installation and maintenance.
Theatres and Performing Arts Centres
Accurate imaging and controlled coverage support professional sound reinforcement.
Educational Facilities
Coaxial loudspeakers provide consistent coverage in lecture halls and auditoriums.
OEM Loudspeaker Manufacturing
Manufacturers can utilise the FBCLX64 as part of a complete factory-optimised loudspeaker design.
Passive Design Simplicity and Reliability
The B&C FBCLX64 offers all the benefits associated with a high-quality passive crossover network.
Advantages include:
- No external power requirements
- Simplified system wiring
- Reduced installation complexity
- Proven reliability
- Easy integration into loudspeaker enclosures
- Lower system cost compared to active multi-amplifier configurations
- Consistent performance across installations
For many professional loudspeaker projects, a passive crossover remains one of the most practical and reliable solutions available.
Compact Integration for Loudspeaker Manufacturers
Despite its sophisticated crossover design, the B&C FBCLX64 maintains a compact form factor suitable for installation inside a wide range of loudspeaker enclosures.
Overall Dimensions
173 x 120 mm (6.81 x 4.72 inches)
The compact layout allows manufacturers to integrate the crossover efficiently while preserving valuable cabinet volume.
This makes the FBCLX64 suitable for:
- OEM production
- Custom loudspeaker projects
- Retrofit applications
- Prototype development
- Commercial loudspeaker manufacturing
Professional Reliability for Long-Term Operation
B&C products are trusted worldwide throughout the professional audio industry because of their reliability and engineering quality.
The FBCLX64 continues this tradition through:
- Purpose-built crossover design
- Professional-grade components
- Factory-optimised performance
- Reliable passive operation
- Consistent long-term behaviour
- Compatibility with professional sound reinforcement systems
Whether installed in mobile touring systems or permanent installations, the crossover is designed to provide dependable performance over years of operation.
Technical Specifications
B&C FBCLX64 Technical Specifications
Nominal Impedance: 8 Ω
Filter Type: Two-Way Passive Crossover
Crossover Frequency: 1.7 kHz
Filter Slopes: 24 dB/octave – 12 dB/octave
Overall Dimensions: 173 x 120 mm (6.81 x 4.72 in)
Compatible Driver
Designed Specifically For
B&C 12CLX64 Coaxial Loudspeaker – 8 Ω
The crossover network has been engineered exclusively for use with the B&C 12CLX64 and the recommended CX12.64 enclosure design.
Mounting and Shipping Information
Physical Specifications
Net Weight: 0.64 kg (1.41 lb)
Shipping Weight: 0.68 kg (1.50 lb)
Shipping Units: 1 Piece
Shipping Box Dimensions: 180 x 130 x 55 mm (7.1 x 5.1 x 2.2 in)
Why Choose the B&C FBCLX64?
The B&C FBCLX64 is a factory-engineered passive crossover network specifically developed for the B&C 12CLX64 coaxial loudspeaker and CX12.64 recommended enclosure design. Featuring a carefully optimised 1.7 kHz crossover frequency, advanced 24 dB/octave and 12 dB/octave filter slopes, and purpose-built integration with one of B&C’s most respected coaxial transducers, it delivers the performance, consistency, and reliability required in professional audio applications.
For loudspeaker manufacturers, system designers, installers, and builders seeking a proven crossover solution that maximises the acoustic performance of the B&C 12CLX64, the B&C FBCLX64 provides an ideal combination of factory-optimised tuning, professional reliability, and exceptional point-source sound quality.
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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.
