B&C 10BG76 – Superior 10-Inch Neodymium Long-Throw Subwoofer Driver for Compact Deep Bass
The B&C 10BG76 is the smallest driver in B&C’s BG long-throw subwoofer family — and it carries the full premium feature set of the platform without compromise. With 9.6 mm of linear excursion, 12 mm of Xvar, a neodymium ring magnet, aluminium demodulating ring, double silicone spider, excursion-optimised woven lead wires, and a 500 W AES power rating, the B&C 10BG76 delivers displacement capability from a 10-inch frame that rivals many 12-inch subwoofer drivers. This is not a woofer repurposed for sub duties — it’s a dedicated long-throw sub engineered from the ground up for deep, controlled bass output.
The 9.6 mm Xmax is extraordinary for a 10-inch driver — it matches the 15BG76’s figure from a cone that’s five inches smaller. The 25 mm winding depth, the deepest of any 10-inch driver in B&C’s range, keeps more coil inside the magnetic gap through the long excursion stroke, maintaining consistent force output at the displacement extremes where conventional short-coil 10-inch drivers have already lost control.
At 4.85 kg with a 49 Hz – 800 Hz bandwidth and a Qts of 0.22 that favours vented enclosures, the B&C 10BG76 is built for ultra-compact sub cabinets, under-seat subs, distributed bass arrays, and any application where a 10-inch sub needs to deliver genuine low-frequency authority that the woofer-class 10s can’t provide.
Design and Construction of the B&C 10BG76
The B&C 10BG76 uses a 76 mm (3-inch) copper voice coil wound on a glass fibre former. Copper winding is the deliberate choice for a high-power sub driver — the superior thermal conductivity manages heat more effectively than aluminium under the sustained high-power, high-excursion operation this driver is designed for. The 25 mm winding depth — the deepest of any 10-inch driver B&C makes — operating in an 11.5 mm magnetic gap yields 9.6 mm of linear one-way excursion (Xmax) with a generous 12 mm of additional travel (Xvar) before mechanical limits.
That 21.6 mm total one-way excursion before damage is the highest of any 10-inch driver in B&C’s range by a significant margin — the next closest is the woofer-class NDL64 at 13 mm total. Excursion-optimised lead wires woven through the spider prevent fatigue and breakage at these sustained displacement levels, and the double silicone spider provides the progressive stiffness needed for controlled behaviour through the full excursion stroke.
The motor uses a neodymium ring magnet in a T-pole configuration, producing 1.22 T of flux density and a force factor (Bl) of 22.4 Tm — the highest Bl of any 10-inch driver in B&C’s range. The ring magnet topology provides uniform flux distribution, and an aluminium demodulating ring reduces flux modulation in the voice coil gap, keeping distortion controlled as the driver operates at the high excursion levels it’s built for. The 22.4 Tm motor has absolute authority over the 91.4 g moving mass at every point of the excursion stroke.
The curvilinear cone profile is optimised for low-frequency piston behaviour within the 800 Hz upper bandwidth. The rubber roll surround provides the high compliance and large stroke capability that long-throw sub-bass operation demands. TWP waterproof treatment on both sides provides full weather resistance. At 4.85 kg, 261 mm overall diameter, and 131 mm depth, the B&C 10BG76 is the heaviest and deepest 10-inch driver in B&C’s range — the neo ring magnet, double spider, and deep-wound copper coil account for every gram.
Performance and Applications for the B&C 10BG76
The B&C 10BG76 delivers 91.5 dB sensitivity and 0.86% reference efficiency across a 49 Hz – 800 Hz bandwidth. The sensitivity is lower than B&C’s woofer-class 10s (96–97 dB) — and that’s by design. Every parameter trades efficiency for displacement and low-frequency output. The heavy 91.4 g moving mass, deep 25 mm winding, and high-compliance roll surround all sacrifice sensitivity to achieve the 9.6 mm Xmax and 49 Hz Fs that make genuine sub-bass output from a 10-inch frame possible.
The Thiele–Small parameters are surprisingly motor-dominant for a BG sub driver. A Qts of 0.22 and an EBP of 213 Hz are lower than the larger BG-series subs (12BG100 at 0.33, 15BG100 at 0.44, 15BG76 at 0.56) — the B&C 10BG76’s neo ring magnet and 22.4 Tm Bl provide extreme electromagnetic damping that keeps the cone under tight control. This driver demands a vented enclosure — the low Qts will produce an over-damped, thin response in a sealed box. Builders should model the T/S parameters in simulation software — expect optimal results in the 10–20 litre range depending on target tuning frequency and response shape.
The 800 Hz upper bandwidth confirms the B&C 10BG76’s role as a dedicated sub driver — it operates below a woofer or mid-range section, handling the low-frequency energy that the woofer-class 10s can’t reach. For systems using a 10-inch woofer-class driver for mid-bass and a dedicated 10-inch sub below it, the B&C 10BG76 is the sub half of that equation.
Ideal applications for the B&C 10BG76 include:
- Ultra-compact subwoofer cabinets for portable PA and DJ systems
- Under-seat and in-fill sub applications where larger formats won’t fit
- Distributed bass arrays using multiple compact 10-inch sub cabinets
- Dedicated sub section paired with woofer-class 10-inch drivers above
- Vented sub designs where the low Qts delivers tight, controlled bass output
Specifications – B&C 10BG76
- Nominal Diameter: 250 mm (10 in)
- Nominal Impedance: 8 Ω
- Minimum Impedance: 6.8 Ω
- Nominal Power Handling: 500 W
- Continuous Power Handling: 1000 W
- Sensitivity: 91.5 dB
- Frequency Range: 49 Hz – 800 Hz
- Voice Coil Diameter: 76 mm (3 in)
- Winding Material: Copper
- Former Material: Glass Fibre
- Winding Depth: 25 mm (1 in)
- Magnetic Gap Depth: 11.5 mm (0.45 in)
- Flux Density: 1.22 T
- Magnet Material: Neodymium Ring
- Cone Shape: Curvilinear
- Cone Treatment: TWP Waterproof (both sides)
- Surround Shape: Roll
- Spider: Double Silicone
- Pole Design: T-Pole
- Net Weight: 4.85 kg (10.69 lb)
Thiele–Small Parameters – B&C 10BG76
- Fs: 49 Hz
- Re: 4.1 Ω
- Qes: 0.23
- Qms: 5.74
- Qts: 0.22
- Vas: 16.7 dm³ (0.59 ft³)
- Sd: 320 cm² (49.6 in²)
- η0: 0.86%
- Xmax: 9.6 mm
- Xvar: 12 mm
- Mms: 91.4 g
- Bl: 22.4 Tm
- Le: 1.37 mH
- EBP: 213 Hz
Mounting Information – B&C 10BG76
- Overall Diameter: 261 mm (10.28 in)
- Bolt Circle Diameter: 246 mm (9.69 in)
- Baffle Cutout Diameter: 233 mm (9.17 in)
- Depth: 131 mm (5.16 in)
- Flange and Gasket Thickness: 14 mm (0.55 in)
- Air Volume Occupied by Driver: 1.5 dm³ (0.05 ft³)
Conclusion – B&C 10BG76 Subwoofer Driver
The B&C 10BG76 is the most displacement-capable 10-inch driver in B&C’s entire range — and it isn’t close. The 9.6 mm Xmax, 12 mm Xvar, 25 mm winding depth, and 22.4 Tm Bl are all absolute range-topping figures at 10 inches, and the full BG platform feature set — neo ring magnet, demod ring, double spider, woven leads, TWP both sides — ensures the driver delivers that displacement cleanly, consistently, and reliably under sustained high-power use.
The Qts of 0.22 makes the B&C 10BG76 more motor-dominant than the larger BG-series subs, which means it produces tight, fast, tightly controlled bass in vented enclosures rather than the softer, more naturally extended response the higher-Qts BG drivers deliver. Builders should model the enclosure carefully — the low Qts and small Vas of 16.7 litres mean this driver responds well to compact vented cabinets in the 10–20 litre range, which is exactly the kind of ultra-compact sub design the 10-inch format is made for.
For ultra-compact sub cabinets, under-seat subs, distributed bass arrays, and any application where a 10-inch driver needs to deliver genuine sub-bass displacement with the motor control and distortion performance of a premium long-throw transducer, the B&C 10BG76 is the smallest member of the BG family — and it carries every gram of the platform’s authority.
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.
