B&C 10CLA76 – Highest-Power 10-Inch Neodymium Woofer with 3-Inch Coil and Maximum Excursion
The B&C 10CLA76 is the newest and most powerful neodymium 10-inch woofer in B&C’s range. Stepping up to a 76 mm voice coil — the largest neodymium coil diameter available in a B&C 10-inch woofer — the B&C 10CLA76 delivers 400 W AES power handling and 6.5 mm of linear excursion, both figures that exceed every other neo 10-inch in the lineup. At 96.5 dB sensitivity, 1.92% efficiency, and 3.15 kg, it brings the CLA series promise of neodymium performance at ferrite-competitive pricing to the 3-inch coil class.
The jump from a 2.5-inch to a 3-inch coil changes what a neo 10-inch woofer can do. The larger coil provides substantially more surface area for heat dissipation, which is why the B&C 10CLA76 handles 400 W AES — 33% more than the NW64’s 300 W and 60% more than the CLA64’s 250 W. The 18.55 Tm force factor matches the NW64 as the strongest motor in the neo 10-inch woofer range, and the triple-roll surround — unique among B&C’s 10-inch woofers — supports the 6.5 mm Xmax with controlled, progressive compliance.
B&C recommends a 29-litre vented enclosure tuned to 70 Hz. With a Qts of 0.29 and an EBP of 237 Hz, the B&C 10CLA76 is built for vented and horn-loaded enclosures where its strong motor damping and high power handling deliver tight, controlled, sustained output. At 3.15 kg, it remains price-competitive with ferrite designs offering similar performance — B&C’s own CLA series positioning.
Design and Construction of the B&C 10CLA76
The B&C 10CLA76 uses a 76 mm (3-inch) aluminium voice coil wound on a glass fibre former. This is the largest neodymium coil in B&C’s 10-inch woofer range, and the step up from 2.5 inches is significant — the 3-inch coil provides roughly 44% more coil surface area for thermal dissipation, directly supporting the 400 W AES power rating. The 18.5 mm winding depth operating in an 11 mm magnetic gap yields 6.5 mm of linear one-way excursion (Xmax) with an additional 7 mm of travel (Xvar) before mechanical limits — the highest excursion figures of any neodymium 10-inch woofer B&C makes.
The motor uses a neodymium inside-slug magnet in a T-pole configuration, producing 1.2 T of flux density and a force factor (Bl) of 18.55 Tm. The T-pole design concentrates flux more efficiently than the straight pole found on the CLA64, and the resulting Bl figure matches the NW64 as the joint-strongest motor in the neo 10-inch woofer range. The 18.55 Tm driving the 44.7 g moving mass produces firm motor control with 1.92% efficiency — the highest efficiency of any 3-inch coil 10-inch neo woofer B&C offers.
A ventilated voice coil gap reduces power compression during sustained high-power operation — a critical feature when the driver is handling 400 W AES over extended periods. The triple-roll surround is unique among B&C’s 10-inch woofers — every other 10-inch uses a double-roll design. The triple-roll provides more controlled compliance and better excursion behaviour at the 6.5 mm Xmax this driver delivers, supporting consistent performance throughout the stroke.
The exponential cone features TWP waterproof treatment on both sides for full weather resistance. A single spider handles suspension. At 3.15 kg, 258 mm overall diameter, 122 mm depth, and 10 mm flange thickness, the B&C 10CLA76 shares the same overall diameter and baffle cutout (232 mm) as the CLA64, making it a drop-in replacement in CLA64 cabinets — though the 11 mm deeper depth (122 mm vs 111 mm) should be verified for rear clearance.
Performance and Applications for the B&C 10CLA76
The B&C 10CLA76 delivers 96.5 dB sensitivity and 1.92% reference efficiency across a 70 Hz – 2500 Hz bandwidth. The 96.5 dB sensitivity edges the 96 dB of the CLA64, CL64, CL51, and NW64 — half a dB that comes from the stronger T-pole motor and higher flux density (1.2 T vs 1.05–1.16 T on the 2.5-inch coil alternatives). At full rated power, the combination of 96.5 dB sensitivity and 400 W AES produces peak output that surpasses every other neo 10-inch woofer in the range by a meaningful margin.
The Thiele–Small parameters define a motor-dominant driver built for vented and horn-loaded enclosures. A Qts of 0.29 and an EBP of 237 Hz place the B&C 10CLA76 firmly in tuned-enclosure territory, producing tight, fast, well-controlled bass and mid-bass output. B&C recommends a 29-litre (1.02 ft³) vented enclosure tuned to 70 Hz — a compact cabinet that targets punchy mid-bass output in the 75–300 Hz range where live sound energy is most concentrated.
The 70 Hz lower frequency limit and 71 Hz Fs are higher than the 2.5-inch coil alternatives (50–65 Hz), which means the B&C 10CLA76 doesn’t reach as deep into the bass as the NDL64 or NW64. The trade-off is clear and intentional — the 3-inch coil adds thermal capacity and motor authority at the expense of low-end extension. For systems using a dedicated sub section below the 10-inch woofer, the B&C 10CLA76’s 70 Hz lower limit is not a limitation — it’s a design match. For two-way systems requiring deeper bass reach without a sub, the 2.5-inch coil NDL64 or NW64 remain the better choice.
Ideal applications for the B&C 10CLA76 include:
- High-power compact two-way tops with dedicated sub support
- Vented and horn-loaded 10-inch cabinets requiring maximum sustained power handling
- Flown speaker systems where B&C’s “especially where flown” positioning applies
- Three-way systems where the 10-inch handles mid-bass duties above a dedicated bass section
- Builds upgrading from CLA64 installations needing more power handling and excursion
Specifications – B&C 10CLA76
- Nominal Diameter: 250 mm (10 in)
- Nominal Impedance: 8 Ω
- Minimum Impedance: 6.5 Ω
- Nominal Power Handling: 400 W
- Continuous Power Handling: 800 W
- Sensitivity: 96.5 dB
- Frequency Range: 70 Hz – 2500 Hz
- Voice Coil Diameter: 76 mm (3 in)
- Winding Material: Aluminium
- Former Material: Glass Fibre
- Winding Depth: 18.5 mm (0.73 in)
- Magnetic Gap Depth: 11 mm (0.43 in)
- Flux Density: 1.2 T
- Magnet Material: Neodymium (inside slug)
- Cone Shape: Exponential
- Cone Treatment: TWP Waterproof (both sides)
- Surround Shape: Triple Roll
- Spider: Single
- Pole Design: T-Pole
- Net Weight: 3.15 kg (6.94 lb)
Thiele–Small Parameters – B&C 10CLA76
- Fs: 71 Hz
- Re: 5.2 Ω
- Qes: 0.3
- Qms: 6.72
- Qts: 0.29
- Vas: 16.4 dm³ (0.58 ft³)
- Sd: 320 cm² (49.6 in²)
- η0: 1.92%
- Xmax: 6.5 mm
- Xvar: 7 mm
- Mms: 44.7 g
- Bl: 18.55 Tm
- Le: 1.14 mH
- EBP: 237 Hz
Mounting Information – B&C 10CLA76
- Overall Diameter: 258 mm (10.16 in)
- Bolt Circle Diameter: 245 mm (9.65 in)
- Baffle Cutout Diameter: 232 mm (9.13 in)
- Depth: 122 mm (4.8 in)
- Flange and Gasket Thickness: 10 mm (0.39 in)
- Air Volume Occupied by Driver: 1.6 dm³ (0.06 ft³)
- Recommended Enclosure Volume: 29 dm³ (1.02 ft³)
- Recommended Tuning Frequency: 70 Hz
Conclusion – B&C 10CLA76 Woofer
The B&C 10CLA76 is the most powerful neodymium 10-inch woofer B&C makes. The 400 W AES power rating and 6.5 mm Xmax both lead the neo 10-inch range, and the 3-inch coil provides the thermal headroom that no 2.5-inch coil alternative can match. The triple-roll surround — unique at this format — and TWP dual-side waterproofing confirm that B&C built this driver for sustained professional use, not just spec-sheet performance.
The trade-off against the 2.5-inch coil range is the higher Fs and narrower low-frequency reach — 70 Hz lower limit versus 50–65 Hz on the NDL64, NW64, and CL64. For systems with a dedicated sub section below the 10-inch woofer, the B&C 10CLA76’s tighter bandwidth and higher power handling make it the stronger choice. For sub-less two-way systems needing deep bass reach from the woofer alone, the 2.5-inch coil alternatives still hold the advantage.
For high-power compact tops, flown speaker systems, horn-loaded mid-bass applications, and any build where a 10-inch woofer needs to handle the most power and deliver the most excursion available in a neodymium package, the B&C 10CLA76 is the neo 10-inch that sets the ceiling. CLA series pricing, 3-inch coil performance, 3.15 kg — B&C’s best 10-inch woofer for sustained high-power use.
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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.
