B&C 19RS115 – Precision 19-Inch Subwoofer Driver with Unmatched Power Density

The B&C 19RS115 is B&C’s first-ever 19-inch subwoofer driver, and it enters the lineup with a clear mission: deliver the output and displacement of a large-format sub while keeping sensitivity high and weight low. Built on the new RS Series motor platform, this driver takes the proven four-layer aluminium voice coil design from B&C’s popular DS Series and pushes it further with a higher-flux motor and extended excursion capability.

With a 2000 W AES power rating, 4000 W continuous program power, and 23.5 mm of linear excursion, the B&C 19RS115 is purpose-built for high-output subwoofer applications where every watt needs to count. At just 15.8 kg, it’s significantly lighter than most 21-inch alternatives — a meaningful advantage for touring rigs and portable systems.

The 19-inch format itself is the sweet spot here. You get more radiating area than an 18-inch driver without the cabinet bulk of a 21, making the B&C 19RS115 an ideal candidate for compact sub designs that still need to hit hard in the low end.

Design and Construction of the B&C 19RS115

The heart of the B&C 19RS115 is its 116 mm (4.5-inch) four-layer copper-clad aluminium wire voice coil wound on a glass fibre former. The four-layer winding geometry is key — it concentrates more energy in the magnetic gap while generating less heat than a comparable two-layer design with a larger coil diameter. The result is higher sensitivity and better thermal behaviour without sacrificing power handling.

The motor uses a neodymium inside-slug magnet in a T-pole configuration, fitted with an aluminium demodulating ring. That demodulating ring is doing real work — it reduces flux modulation in the voice coil gap, which directly translates to lower harmonic and intermodulation distortion under load. Combined with a force factor (Bl) of 42 Tm, the motor exerts exceptional control over the 447 g moving mass, keeping transients tight even at high excursion levels.

Suspension is handled by a double silicone spider with optimised compliance, paired with a triple-roll surround. The 54 mm winding depth operating in a 14 mm magnetic gap yields 23.5 mm of linear one-way excursion (Xmax) with 19 mm of additional travel (Xvar) before mechanical limits. Lead wires are woven through the spider — an excursion-optimised design that prevents fatigue and breakage during sustained high-displacement use.

The straight-profile cone features TWP waterproof treatment on both sides, giving you weather resistance for outdoor rigs and festival deployments. A ventilated voice coil gap rounds out the thermal design, reducing power compression so output stays consistent when the driver is working hard over extended sets.

Performance and Applications for the B&C 19RS115

The B&C 19RS115 covers a 30 Hz – 1000 Hz frequency range with 96.7 dB sensitivity and 2.3% reference efficiency. For a long-throw 19-inch transducer carrying 447 g of moving mass, that sensitivity figure is impressive — it means you’re getting meaningful output from every watt before you even start pushing power.

The Thiele–Small parameters tell a clear story. A Qts of 0.20 and an EBP of 138 Hz place this driver firmly in vented or horn-loaded enclosure territory. The low Fs of 29 Hz combined with a Vas of 197 litres means it wants a reasonably sized vented cabinet — expect something in the 150–200 litre range depending on your alignment target and tuning frequency. The 1450 cm² of radiating area multiplied by 23.5 mm of Xmax gives you substantial displacement capability for deep sub-bass work.

Where the B&C 19RS115 really stands out is in power density. B&C’s own positioning is direct — this driver outperforms many alternatives that rely on larger-diameter voice coils and higher power ratings but lack the motor efficiency to convert that power into useful acoustic output. The RS Series approach favours a balanced motor over brute-force power handling, and that philosophy shows in the numbers.

Ideal applications for the B&C 19RS115 include:

• Compact touring subwoofer cabinets that need maximum output in minimum size
• Vented and horn-loaded sub designs for live sound reinforcement
• Permanent install systems in clubs, venues, and houses of worship
• High-output DIY subwoofer builds where weight and efficiency matter

Specifications – B&C 19RS115

• Nominal Diameter: 483 mm (19 in)
• Nominal Impedance: 8 Ω
• Minimum Impedance: 6.5 Ω
• Nominal Power Handling: 2000 W
• Continuous Power Handling: 4000 W
• Sensitivity: 96.7 dB
• Frequency Range: 30 Hz – 1000 Hz
• Voice Coil Diameter: 116 mm (4.5 in)
• Winding Material: Copper-Clad Aluminium Wire (four-layer)
• Former Material: Glass Fibre
• Winding Depth: 54 mm (2.13 in)
• Magnetic Gap Depth: 14 mm (0.55 in)
• Flux Density: 0.9 T
• Magnet Material: Neodymium (inside slug)
• Cone Shape: Straight
• Cone Treatment: TWP Waterproof (both sides)
• Surround Shape: Triple Roll
• Spider: Double Silicone
• Pole Design: T-Pole
• Net Weight: 15.8 kg (34.83 lb)

Thiele–Small Parameters – B&C 19RS115

• Fs: 29 Hz
• Re: 4.6 Ω
• Qes: 0.21
• Qms: 6.2
• Qts: 0.20
• Vas: 197 dm³ (6.96 ft³)
• Sd: 1450 cm² (224.75 in²)
• η0: 2.3%
• Xmax: 23.5 mm
• Xvar: 19 mm
• Mms: 447 g
• Bl: 42 Tm
• Le: 4.1 mH
• EBP: 138 Hz

Mounting Information – B&C 19RS115

• Overall Diameter: 494 mm (19.45 in)
• Bolt Circle Diameter: 476 mm (18.74 in)
• Baffle Cutout Diameter: 455 mm (17.91 in)
• Depth: 285 mm (11.22 in)
• Flange and Gasket Thickness: 13 mm (0.51 in)

Conclusion – B&C 19RS115 Subwoofer Driver

The B&C 19RS115 carves out a new category in B&C’s lineup. The 19-inch format gives you more cone area than an 18 without the weight and cabinet volume of a 21, and the RS Series motor architecture backs that up with a force factor and efficiency that punches well above what the 4.5-inch voice coil diameter might suggest on paper.

For builders looking to get maximum acoustic output per kilogram, the B&C 19RS115 makes a compelling case. The combination of 96.7 dB sensitivity, 23.5 mm of Xmax, and a 42 Tm force factor at just 15.8 kg is a rare combination in the sub driver market. Add in the aluminium demodulating ring for cleaner output under load, and you’ve got a driver that performs as well as it measures.

Whether you’re designing compact touring subs, high-output permanent install systems, or a serious DIY build that needs real low-end authority, the B&C 19RS115 delivers the power density and control to get the job done, without the bulk.

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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.