B&C 14NDL76 – Precision 14-Inch Neodymium Woofer Bridging the Gap Between 12 and 15

The B&C 14NDL76 is a 13.5-inch / 14-inch neodymium woofer that occupies a unique position in B&C’s range — more cone area and output than a 12-inch driver, but compact enough to fit cabinet designs where a full 15-inch frame won’t work. At 4.35 kg with 99 dB sensitivity, 2.7% reference efficiency, a 40 Hz – 3000 Hz bandwidth, and premium features including an aluminium demodulating ring and ventilated gap, the B&C 14NDL76 delivers 15-inch-class performance in a 14-inch footprint.

The 3000 Hz upper bandwidth matches B&C’s best wideband 15-inch woofers, which means the B&C 14NDL76 crosses over to a compression driver just as comfortably as its larger siblings — but from a driver that’s 34 mm narrower and over a kilogram lighter than B&C’s lightest neo 15. For two-way tops, compact line array modules, and space-constrained speaker designs, that size advantage translates directly into tighter cabinets and lower system weight.

B&C recommends a 75-litre vented enclosure tuned to 53 Hz — a compact cabinet that maximises mid-bass punch and output density in the frequency range where most live sound energy lives. With a Qts of 0.30 and an EBP of 132 Hz, the B&C 14NDL76 is designed for vented and horn-loaded enclosures where its efficiency and bandwidth deliver the most value.

Design and Construction of the B&C 14NDL76

The B&C 14NDL76 uses a 76 mm (3-inch) copper voice coil wound on a glass fibre former. The 21 mm winding depth operating in a 10 mm magnetic gap yields 8 mm of linear one-way excursion (Xmax) with an additional 9.5 mm of travel (Xvar) before mechanical limits. The copper winding provides strong thermal conductivity, supporting the 500 W AES power rating through sustained high-power operation.

The motor uses a neodymium inside-slug magnet in a T-pole configuration, producing 1.15 T of flux density and a force factor (Bl) of 19 Tm. An aluminium demodulating ring in the motor assembly reduces flux modulation in the voice coil gap, keeping harmonic and intermodulation distortion low as power and excursion increase. This is a genuine premium feature — having both a demodulating ring and a ventilated gap on a 4.35 kg woofer at this price point makes the B&C 14NDL76 a strong value proposition against both 12 and 15-inch alternatives.

The ventilated voice coil gap allows air circulation around the coil, reducing power compression so the B&C 14NDL76 maintains its rated output during extended use. The exponential cone profile supports pistonic behaviour well into the upper frequencies, enabling the remarkable 3000 Hz upper bandwidth. A single spider handles suspension, reflecting the light 85 g moving assembly.

WP waterproof treatment on the front side of the cone provides moisture resistance. At 4.35 kg, 359 mm overall diameter, and 161 mm depth, the B&C 14NDL76 is exceptionally compact and light — the kind of driver that disappears inside a cabinet and lets the enclosure designer focus on system performance rather than working around driver bulk.

Performance and Applications for the B&C 14NDL76

The B&C 14NDL76 delivers 99 dB sensitivity and 2.7% reference efficiency across a 40 Hz – 3000 Hz bandwidth. That 99 dB sensitivity from a 14-inch driver is remarkable — it matches the 15-inch NDL76 and CLA76, which means you’re getting the same output per watt from a smaller, lighter driver. The trade-off is radiating area: 707 cm² vs the 15-inch platform’s 855 cm², which means slightly less displacement capability at the low end. For mid-bass and full-range woofer duties, the difference is negligible.

The Thiele–Small parameters show a versatile alignment profile. A Qts of 0.30 and an EBP of 132 Hz place the B&C 14NDL76 in vented territory with enough flexibility for builders to tune for different output profiles. B&C recommends a 75-litre (2.65 ft³) vented enclosure tuned to 53 Hz — a compact, high-tuned alignment that maximises output density in the punch zone. The 85 g moving mass and exponential cone keep the driver responsive and coherent through the entire 3000 Hz bandwidth.

The 14-inch format makes sense in specific design scenarios. If your cabinet width is constrained and a 15-inch driver won’t fit, the B&C 14NDL76 delivers 15-inch sensitivity from a frame that’s 34 mm narrower. In line arrays, every millimetre of driver width affects inter-element spacing and splay angle. In compact two-way tops, the smaller baffle cutout (323 mm vs 354 mm on a 15-inch) can be the difference between a cabinet that works aesthetically and one that doesn’t.

Ideal applications for the B&C 14NDL76 include:

• Compact two-way and three-way active speaker systems
• Line array modules where 15-inch drivers are too wide for the element spacing
• Lightweight portable PA tops and stage monitors
• Horn-loaded mid-bass designs exploiting the low Qts and exponential cone
• Space-constrained cabinet designs where 12-inch drivers lack output and 15-inch drivers won’t fit

Specifications – B&C 14NDL76

• Nominal Diameter: 359 mm (14 in)
• Nominal Impedance: 8 Ω
• Minimum Impedance: 6.1 Ω
• Nominal Power Handling: 500 W
• Continuous Power Handling: 1000 W
• Sensitivity: 99 dB
• Frequency Range: 40 Hz – 3000 Hz
• Voice Coil Diameter: 76 mm (3 in)
• Winding Material: Copper
• Former Material: Glass Fibre
• Winding Depth: 21 mm (0.83 in)
• Magnetic Gap Depth: 10 mm (0.4 in)
• Flux Density: 1.15 T
• Magnet Material: Neodymium (inside slug)
• Cone Shape: Exponential
• Cone Treatment: WP Waterproof (front side)
• Surround Shape: Triple Roll
• Spider: Single
• Pole Design: T-Pole
• Net Weight: 4.35 kg (9.59 lb)

Thiele–Small Parameters – B&C 14NDL76

• Fs: 41 Hz
• Re: 5 Ω
• Qes: 0.31
• Qms: 8.2
• Qts: 0.3
• Vas: 123 dm³ (4.34 ft³)
• Sd: 707 cm² (109.59 in²)
• η0: 2.7%
• Xmax: 8 mm
• Xvar: 9.5 mm
• Mms: 85 g
• Bl: 19 Tm
• Le: 1.1 mH
• EBP: 132 Hz

Mounting Information – B&C 14NDL76

• Overall Diameter: 359 mm (14.13 in)
• Bolt Circle Diameter: 343 mm (13.5 in)
• Baffle Cutout Diameter: 323 mm (12.72 in)
• Depth: 161 mm (6.34 in)
• Flange and Gasket Thickness: 12 mm (0.47 in)
• Air Volume Occupied by Driver: 3 dm³ (0.11 ft³)
• Recommended Enclosure Volume: 75 dm³ (2.65 ft³)
• Recommended Tuning Frequency: 53 Hz

Conclusion – B&C 14NDL76 Woofer

The B&C 14NDL76 solves a specific design problem that neither 12-inch nor 15-inch drivers can address on their own. It delivers 99 dB sensitivity and 3000 Hz bandwidth — matching B&C’s best wideband 15-inch neo woofers — from a 359 mm frame that fits where a 393 mm 15-inch driver can’t. At 4.35 kg, it’s lighter than any 15-inch driver in B&C’s range, and the demodulating ring and ventilated gap ensure the output stays clean and consistent under load.

The 85 g moving mass is the key enabler — it’s the lightest of any neo woofer in B&C’s range above 12 inches, and it’s the reason the B&C 14NDL76 achieves 2.7% efficiency from a 3-inch coil. Fast transient response, coherent upper-frequency output, and the kind of snap that makes vocal reproduction and percussive content sound immediate and present.

For compact two-way tops, line arrays with tight element spacing, lightweight portable PA, and any build where 15 inches is too big but 12 inches isn’t enough, the B&C 14NDL76 fills the gap with 15-inch sensitivity, 3000 Hz bandwidth, and a 4.35 kg weight that makes the cabinet lighter than you expected it could be.

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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.