B&C 12HCX76 – Improve Your 12″ Build with Focused Neodymium Coaxial Precision

When your build needs a 12-inch coaxial that throws sound with focus and accuracy rather than just filling a room, the B&C 12HCX76 delivers. This neodymium coaxial combines a 700 W woofer with a 107 dB titanium compression driver through a modified exponential horn, giving you a tight 60°×40° coverage pattern that puts your sound exactly where you aim it.

At just 5.3 kg, the B&C 12HCX76 is remarkably light for what it delivers. The controlled dispersion, copper voice coil, and 4.1% reference efficiency make this one of the most efficient and focused 12-inch coaxials you can build with — a driver that rewards careful enclosure design with precise, projecting sound.

With 99 dB LF sensitivity and a featherweight 47 g moving mass, the B&C 12HCX76 is built for speed, efficiency, and directional control. It’s the 12-inch coaxial to choose when your project demands more than just wide-angle coverage.

Design and Construction of the B&C 12HCX76

The defining feature of the B&C 12HCX76 is its modified exponential horn flare with a 33 mm (1.3-inch) exit diameter. This horn geometry shapes how the high frequencies load and project from your cabinet, providing smoother acoustic loading at the crossover point and a controlled 60°×40° beam that maintains its energy over distance.

For your build, that means sound arrives at the listener with more presence and impact than wider-dispersion coaxials can achieve at the same distance. If you’re building a long-throw compact top, a directional fill speaker, or a stage monitor that needs to stay off nearby microphones, the 12HCX76’s pattern control is a genuine advantage.

The low-frequency section uses a 76 mm (3-inch) copper voice coil on a glass fibre former. Copper winding provides better thermal conductivity than aluminium, which means the coil sheds heat more efficiently during sustained high-power use. Your driver maintains consistent output without the power compression that degrades performance over long sessions.

The moving mass is an exceptionally low 47 g — the lightest in the entire B&C coaxial range. That low mass gives the B&C 12HCX76 lightning-fast transient response. You’ll hear the difference in the snap of percussion, the attack of plucked strings, and the crisp articulation of vocal consonants. Fast drivers like this simply sound more alive and immediate.

The waterproof-treated paper cone handles moisture without degrading, so outdoor and humid-venue builds are covered. The neodymium ring magnet powers both the LF and HF sections from a single compact motor, keeping the total driver weight to just 5.3 kg.

The high-frequency section features a 75 mm (3-inch) aluminium voice coil driving a pure titanium diaphragm at an impressive 107 dB sensitivity. The neodymium motor delivers 1.9 T flux density at the HF gap — the highest in the B&C coaxial range — giving the compression driver exceptional magnetic force for crisp, cutting highs that project clearly even in larger spaces.

Performance and Applications for the B&C 12HCX76

The B&C 12HCX76 handles 700 W continuous on the LF section and 160 W on the HF, giving you solid headroom for professional use. The 4.1% reference efficiency is the highest in B&C’s 12-inch coaxial range, meaning your amplifier watts convert into SPL more effectively than with any other 12-inch coaxial in the lineup.

The Thiele–Small parameters reveal a driver that’s highly optimised for vented enclosures. A Qts of just 0.19 and an EBP of 210 Hz confirm the 12HCX76 is designed for bass-reflex cabinets where the port tuning extends the low end beyond what the driver achieves in free air.

The 120-litre Vas gives you good flexibility in enclosure tuning. The 17.6 Tm Bl factor provides strong motor control over the ultra-light 47 g cone, delivering tight, defined bass that doesn’t smear or get muddy under load. This is a driver that stays articulate even when you push it hard.

Builders commonly choose the B&C 12HCX76 for:

• Compact long-throw PA tops and horn-loaded cabinets
• Directional stage monitors that keep sound off nearby microphones
• Focused fill speakers and delay lines in installed sound systems
• Under-balcony and precision-coverage speakers in theatres and venues
• Lightweight portable cabinets for vocal reinforcement and acoustic acts

Because both drivers share the same acoustic centre, your build produces true point-source output with coherent phase alignment at every listening position. The controlled 60°×40° dispersion means your coverage is predictable and repeatable — less time correcting problems with EQ, more time appreciating how your cabinet sounds.

Specifications – LF Section

• Nominal Diameter: 320 mm (12 in)
• Voice Coil Diameter: 76 mm (3 in)
• Continuous Power Handling: 700 W
• Nominal Power Handling: 350 W
• Nominal Impedance: 8 Ω
• Minimum Impedance: 6.7 Ω
• Frequency Range: 45 Hz – 18,000 Hz
• Sensitivity: 99 dB
• Winding Material: Copper
• Former Material: Glass Fibre
• Winding Depth: 16.5 mm (0.65 in)
• Magnetic Gap Depth: 8 mm (0.31 in)
• Flux Density: 1.15 T
• Cone Treatment: WP Waterproof Front Side

Specifications – HF Section

• Voice Coil Diameter: 75 mm (3 in)
• Continuous Power Handling: 160 W
• Nominal Power Handling: 80 W
• Nominal Impedance: 8 Ω
• Minimum Impedance: 8 Ω
• Recommended Crossover: 1.2 kHz
• Sensitivity: 107 dB
• Winding Material: Aluminium
• Inductance: 0.14 mH
• Flux Density: 1.9 T
• Diaphragm Material: Titanium
• HF Exit Diameter: 33 mm (1.3 in)
• Magnet Material: Neodymium Ring

Conclusion

The B&C 12HCX76 is the 12-inch coaxial to choose when your build demands focused projection, fast transients, and maximum efficiency from a lightweight package. Its 60°×40° controlled dispersion and modified exponential horn give you directional precision that wide-coverage coaxials can’t match at distance.

With the lightest moving mass in the B&C coaxial range at 47 g, the highest reference efficiency at 4.1%, and 107 dB HF sensitivity from a titanium compression driver with 1.9 T flux density, the B&C 12HCX76 rewards you with a cabinet that sounds fast, focused, and effortlessly loud. Whether you’re building a compact long-throw top, a directional monitor, or a precision fill speaker, this driver delivers the kind of controlled performance that makes your enclosure design work exactly the way you intended.

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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.