B&C 12CL64 High-Efficiency 12-Inch Woofer Designed for Vocal-Forward Professional Sound Systems
The B&C 12CL64 is a professional 12-inch low frequency driver designed as a wide-band woofer with a strong emphasis on vocal clarity, efficiency, and controlled midrange performance. Positioned within B&C’s CL series, it is optimised for compact two-way loudspeaker systems, portable PA cabinets, KTV systems, and installation loudspeakers where speech intelligibility and forward vocal projection are more important than extended sub-bass reproduction.
With a 64 mm copper voice coil, high sensitivity, and a lightweight motor assembly, the B&C 12CL64 delivers strong output from relatively low amplifier power. It is engineered for applications where clarity, efficiency, and reliability are key system requirements, particularly in environments where DSP resources or system complexity may be limited.
Wide-Band Woofer Design for Vocal Clarity and Intelligibility
The B&C 12CL64 is built around a wide-bandwidth operating philosophy, covering a frequency range from 50 Hz to 3 kHz. This extended upper bandwidth allows the driver to reproduce a significant portion of the vocal spectrum, making it highly effective in speech reinforcement and vocal-heavy music applications.
With a sensitivity of 98 dB, the driver is highly efficient, converting amplifier power into acoustic output with minimal loss. This makes the B&C 12CL64 particularly suitable for systems that need high output levels while maintaining low power consumption, such as distributed PA systems and compact portable loudspeakers.
The tonal balance is intentionally forward in the midrange region, allowing voices and critical program material to cut through mixes with clarity and presence. This characteristic is especially valuable in communication-focused systems and smaller venues where intelligibility is the primary requirement.
64 mm Copper Voice Coil and High-Flux Ferrite Motor System
At the core of the B&C 12CL64 is a 64 mm (2.5-inch) copper voice coil wound on a glass fibre former. This design provides a strong balance between thermal durability and low moving mass, allowing the driver to maintain good transient response while handling sustained power levels.
The ferrite motor structure produces a flux density of approximately 1.15 T and a BL factor of 17.5 Tm, delivering solid electromagnetic control over cone movement. This ensures stable operation and reduced distortion even when the driver is pushed toward higher excursion limits.
Copper winding improves thermal robustness, allowing the driver to handle up to 500 W program power while maintaining consistent performance. The combination of motor strength and efficient heat handling makes the B&C 12CL64 a reliable option for long-duration operation in professional environments.
A waterproof cone treatment on the front surface enhances durability, particularly in installations where environmental exposure or humidity may be present.
Enclosure Behaviour and System Integration
The B&C 12CL64 is designed for vented enclosure applications, with a recommended cabinet volume of approximately 40 litres tuned around 64 Hz. This alignment supports a controlled low-frequency response with emphasis on punch and clarity rather than deep sub-bass extension.
Key Thiele-Small parameters such as Qts of 0.30 and EBP of 163 indicate a driver strongly suited to bass-reflex systems with efficient output characteristics. These values reflect a design optimised for sensitivity and vocal presence rather than subwoofer-style low-frequency depth.
The moving mass of 55 g contributes to fast transient behaviour, allowing the driver to respond quickly to dynamic input signals. Combined with a BL factor of 17.5 Tm, this ensures tight cone control and consistent performance across its operating range.
With a relatively high Sd of 522 cm², the B&C 12CL64 is capable of moving sufficient air volume to deliver impactful midbass performance in compact systems.
Reliable Power Handling for Professional Applications
The B&C 12CL64 is rated at 250 W AES and 500 W program power handling, making it suitable for moderate-to-high output professional applications where efficiency is more important than extreme power capacity.
The copper voice coil provides stable thermal performance under continuous use, while the motor structure ensures predictable behaviour under load. This combination makes the driver well suited to portable PA systems, installation loudspeakers, and vocal reinforcement cabinets.
Its balance of high sensitivity, wide frequency response, and moderate power handling makes it particularly effective in systems designed for speech intelligibility and general-purpose sound reinforcement.
Specifications
- Nominal Diameter: 320 mm (12″)
- Voice Coil Diameter: 64 mm (2.5″)
- Continuous Power Handling: 500 W
- Nominal Power Handling: 250 W AES
- Nominal Impedance: 8 Ω
- Minimum Impedance: 6.3 Ω
- Frequency Range: 50 Hz – 3000 Hz
- Sensitivity: 98 dB
- Resonance Frequency (Fs): 52 Hz
- Qes: 0.32
- Qms: 4.3
- Qts: 0.30
- Vas: 64 dm³
- BL Factor: 17.5 Tm
- Xmax: 4.5 mm
- Moving Mass (Mms): 55 g
- Effective Cone Area (Sd): 522 cm²
- Inductance (Le): 1.1 mH
- Recommended Enclosure Volume: 40 dm³
- Recommended Tuning Frequency: 64 Hz
- Net Weight: 1.9 kg
Conclusion
The B&C 12CL64 is a high-efficiency wide-band woofer designed for professional systems where vocal clarity, sensitivity, and controlled midrange performance are the primary requirements. Its 64 mm copper voice coil, lightweight moving assembly, and high sensitivity make it especially effective in compact two-way systems and installation loudspeakers. For designers seeking a reliable 12-inch driver optimised for speech intelligibility and efficient operation, the B&C 12CL64 delivers consistent performance in demanding professional audio applications.
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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.
