B&C 15CXN76 – Improve Your 15″ DIY Coaxial Build with Neodymium Efficiency

If you’re building a compact full-range cabinet and want genuine point-source performance without the back-breaking weight of a ferrite motor, the B&C 15CXN76 deserves your attention. This 15-inch neodymium coaxial driver packs both a high-output woofer and a 3-inch compression driver into a single chassis that weighs just 5.4 kg. That means you can build a powerful two-way cabinet that’s light enough to carry with one hand — something any gigging builder or hobbyist will appreciate on load-in day.

The B&C 15CXN76 gives you 99 dB sensitivity on the low end and 105 dB on the high-frequency section, so your build will be loud and efficient without needing a massive amplifier to drive it. With an 80-degree dispersion angle, the sound spreads wide and even — ideal for stage monitors, compact PA tops, or home studio reference builds where you want consistent coverage across the room.

Design and Construction

At the heart of the B&C 15CXN76 is a single neodymium ring magnet that powers both the woofer and compression driver. This shared-magnet design is what keeps the weight so remarkably low — nearly half the weight of comparable ferrite coaxials. For DIY builders, that translates directly into lighter enclosures, simpler rigging, and easier transport without giving up any output.

The low-frequency section uses a 76 mm (3-inch) copper voice coil on a glass fibre former. Copper gives you better thermal handling than aluminium, which means the driver stays consistent during long sessions at high volume. The cone is waterproof-treated on the front side, so if you’re building cabs for outdoor use or humid venues, you won’t have to worry about moisture degrading your investment over time.

On the high-frequency side, you get a 75 mm (3-inch) aluminium voice coil paired with a polyester/titanium composite diaphragm. This hybrid material is a real advantage for your build — titanium provides the stiffness for extended high-frequency reach, while the polyester layer damps breakup modes that can cause harshness. The result is clear, smooth highs without the brittle edge that pure titanium diaphragms sometimes produce at high SPL.

The neodymium motor pushes 1.9 T flux density at the HF gap — significantly higher than most ferrite designs in this class. That extra magnetic force is what delivers the 105 dB HF sensitivity, giving your build serious projection and vocal clarity even in larger spaces.

Performance and Applications for the B&C 15CXN76

The B&C 15CXN76 handles 800 W continuous on the LF section and 160 W on the HF section, giving you plenty of headroom for clean, undistorted output. The frequency response runs from 40 Hz all the way up to 18 kHz, with a recommended crossover point at 1.2 kHz. If you’re running an active crossover or DSP, you can fine-tune that point to suit your enclosure design. If you prefer a simpler passive setup, B&C also makes the FB15CX40 crossover network specifically matched to this driver — a plug-and-play solution that takes the guesswork out of your crossover build.

With a Qts of 0.28 and an EBP of 127 Hz, the 15CXN76 is clearly optimised for vented enclosure designs. If you’re planning a bass-reflex cabinet — which most DIY builders will be for a driver like this — you’ll get deep, controlled low-end extension that makes the most of the driver’s 855 cm² piston area. The 246-litre Vas gives you flexibility in enclosure sizing, whether you’re going for a compact wedge monitor or a larger full-range top.

Builders commonly use the B&C 15CXN76 for:

• Lightweight two-way full-range cabinets for gigging and portable PA
• Coaxial stage monitors with true point-source imaging
• Home studio reference monitors where accuracy and low colouration matter
• Outdoor and festival builds that need weather-resistant components
• Custom install projects in churches, theatres, and small venues

Because both drivers share the same acoustic centre, your build will produce coherent, phase-aligned sound at every listening position. You won’t get the comb-filtering or off-axis lobing that separate woofer-and-horn designs create, which means less time correcting problems with EQ and more time enjoying the results of your build.

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: 105 dB
• Winding Material: Aluminium
• Inductance: 0.14 mH
• Flux Density: 1.9 T
• Diaphragm Material: Polyester/Titanium
• Magnet Material: Neodymium Ring

Conclusion

The B&C 15CXN76 is one of the most compelling 15-inch coaxial drivers you can drop into a DIY build. It gives you full-range point-source performance, neodymium efficiency, and serious output — all at a weight that won’t punish your back or your enclosure design. The polyester/titanium HF diaphragm delivers smooth, detailed highs without harshness, the waterproof LF cone handles real-world conditions, and the compatibility with the B&C FB15CX40 passive crossover means you can have a complete two-way system without designing your own filter network. Whether you’re building a lightweight gigging cab, a coaxial wedge monitor, or a compact full-range top for your home rig, the B&C 15CXN76 gives you professional-grade results from a driver that’s genuinely enjoyable to build around.

VIEW MORE B&C PRODUCTS HERE.

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.