B&C 15HCX76 – Improve Your 15″ Coaxial Build with Neodymium Power and Controlled Dispersion

If your build calls for a 15-inch coaxial that throws sound with precision rather than just filling a room, the B&C 15HCX76 is the driver to consider. This neodymium-powered coaxial pairs a high-output 15-inch woofer with a titanium compression driver through a modified exponential horn, delivering a tight 60°×40° coverage pattern that puts your sound exactly where you point it. At just 6 kg, the B&C 15HCX76 keeps your enclosure light enough for easy transport while giving you the kind of focused, high-SPL output that wider-dispersion coaxials simply can’t match at distance.

With 99 dB LF sensitivity and a remarkable 107 dB on the HF section, this driver is built to project. Whether you’re designing a compact horn-loaded top, a long-throw PA cabinet, or a directional stage monitor that keeps vocals off the mics, the B&C 15HCX76 gives you professional-grade pattern control from a single coaxial point source — no separate horn or waveguide needed.

Design and Construction of the B&C 15HCX76

The standout feature of the B&C 15HCX76 is its modified exponential horn flare with a 33 mm (1.3-inch) exit diameter. This isn’t just an aesthetic detail — the horn geometry directly shapes how the high frequencies load and disperse from your cabinet. The exponential profile improves acoustic loading at the crossover point, giving you a smoother handoff between the woofer and compression driver. The 60°×40° pattern means your build will project sound in a controlled beam that maintains its energy over distance, rather than dissipating quickly like wider-dispersion designs tend to do.

The high-frequency section uses a 75 mm (3-inch) aluminium voice coil driving a pure titanium diaphragm. Titanium gives you the stiffness and speed needed for crisp, detailed highs with excellent transient response — you’ll hear the snap and presence in vocals, cymbals, and percussion that softer diaphragm materials struggle to reproduce at high output levels. The neodymium motor pushes 1.9 T flux density at the HF gap, which is what drives the impressive 107 dB sensitivity. For your build, that means your compression driver will keep up with the woofer effortlessly, even at high SPL.

The low-frequency section features a 76 mm (3-inch) copper voice coil wound on a glass fibre former. Copper winding gives you superior thermal conductivity compared to aluminium, which translates to better power compression performance during extended high-volume use. The waterproof-treated paper cone protects against moisture, making the driver a reliable choice if you’re building cabinets for outdoor gigs, humid venues, or any environment where untreated cones would deteriorate.

An aluminium demodulating ring is built into the motor structure, keeping distortion remarkably low across the driver’s operating range. You’ll notice this as cleaner, more detailed midrange reproduction — especially important in a coaxial design where the woofer is handling everything from low bass through to the crossover point. The single neodymium ring magnet drives both the LF and HF sections simultaneously, which is why the B&C 15HCX76 weighs only 6 kg despite its serious output capabilities.

Performance and Applications for the B&C 15HCX76

The B&C 15HCX76 handles 800 W continuous on the LF section and 160 W on the HF, giving you substantial headroom for clean, undistorted output even when you’re pushing your amp hard. The frequency response spans 40 Hz to 18 kHz with a recommended crossover at 1.2 kHz, allowing smooth integration between the woofer and titanium compression driver whether you’re running active DSP or a passive network.

The Thiele–Small parameters tell an important story for your enclosure design. With a Qts of 0.28 and an EBP of 127 Hz, this driver is clearly optimised for vented cabinets. The 246-litre Vas and 855 cm² piston area give you plenty of low-end displacement, while the 3.7% reference efficiency means you’ll get serious volume from modest amplification. If you’re working with a smaller amp or want to keep your rig efficient, the 15HCX76 makes the most of every watt you feed it.

The controlled 60°×40° dispersion makes the B&C 15HCX76 ideal for builds where precision matters:

• Long-throw PA tops and compact horn-loaded cabinets
• Directional stage monitors that keep sound off nearby microphones
• Focused front-of-house cabinets for small-to-medium venues
• Delay fills and under-balcony speakers that need tight pattern control
• Outdoor builds where you need sound to carry further with less spill

Because both the woofer and compression driver share the same acoustic centre, your build produces true point-source output with no phase offset between the low and high frequencies. You won’t deal with the comb-filtering or off-axis lobing that two-way designs with separate components create. The sound is coherent, focused, and predictable — which means less time wrestling with EQ corrections and more time enjoying what you’ve built.

Specifications – LF Section

• Nominal Diameter: 380 mm (15 in)
• Voice Coil Diameter: 76 mm (3 in)
• Continuous Power Handling: 800 W
• Nominal Power Handling: 400 W
• Nominal Impedance: 8 Ω
• Minimum Impedance: 6 Ω
• Frequency Range: 40 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 15HCX76 is the coaxial to reach for when your build needs focused, long-throw performance from a lightweight neodymium platform. Its 60°×40° controlled dispersion, modified exponential horn, and 107 dB titanium compression driver give you the kind of directional precision and vocal clarity that wider-coverage coaxials can’t deliver at distance. The aluminium demodulating ring keeps distortion low through the critical midrange, and the waterproof-treated LF cone handles tough real-world conditions without flinching. At only 6 kg, the B&C 15HCX76 lets you build compact, high-output cabinets that are easy to move and seriously impressive to listen to — whether you’re designing a horn-loaded PA top, a tight-pattern stage monitor, or a focused fill speaker for your next install project.

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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.