The B&C 18SW115-8 is a high-performance 18-inch professional neodymium subwoofer speaker driver built for powerful, clean low-frequency reproduction in demanding professional audio applications. With a massive 4.5-inch split-winding copper voice coil, 1700 watts nominal power handling, 3400 watts continuous program power, and 14 mm Xmax, the 18SW115-8 delivers exceptional output while maintaining excellent control and low distortion.

Designed for professional PA systems, touring sound, high-output subwoofer cabinets, live sound reinforcement, DJ systems, and custom speaker builds, the B&C 18SW115 8 Ohm combines high power handling with a lightweight and powerful neodymium motor structure.

B&C 18SW115-8 Features

• Genuine B&C Speakers 18SW115
• 18″ professional subwoofer speaker
• 8 Ohm nominal impedance
• 1700W nominal power handling
• 3400W continuous program power handling
• 4.5″ (116 mm) split-winding copper voice coil
• 97 dB sensitivity
• 35 Hz–1500 Hz frequency range
• 14 mm Xmax
• High-performance neodymium magnet
• Double silicone spider with optimized compliance
• Ventilated voice coil gap for reduced power compression
• Aluminum demodulating ring for very low distortion
• Excursion-optimized lead wires woven through the spider
• Triple-roll surround
• TWP waterproof cone treatment on both sides

Specifications

Model: 18SW115-8
Nominal Diameter: 18″ (460 mm)
Nominal Impedance: 8 Ohms
Minimum Impedance: 6.5 Ohms
Nominal Power Handling: 1700 Watts
Continuous Program Power: 3400 Watts
Sensitivity: 97 dB
Frequency Range: 35 Hz–1500 Hz
Voice Coil Diameter: 4.5″ (116 mm)
Voice Coil Material: Copper
Former Material: Glass Fibre
Magnet: Neodymium
Fs: 32 Hz
Re: 5.3 Ohms
Qes: 0.32
Qms: 5.6
Qts: 0.30
Vas: 187 L / 6.5 ft³
Sd: 1210 cm² / 187.6 in²
Xmax: ±14 mm
Xvar: ±16 mm
Mms: 275 g
BL: 30.3 Tm
Le: 1.9 mH

Mounting Dimensions

Overall Diameter: 18″ (460 mm)
Bolt Circle Diameter: 17.44″ (443 mm)
Baffle Cutout Diameter: 16.73″ (425 mm)
Mounting Depth: 9.5″ (242 mm)
Flange & Gasket Thickness: 0.62″ (16 mm)
Net Weight: 26.2 lbs (11.9 kg)

B&C recommends an enclosure volume of approximately 5.3 ft³ (150 liters) with a 35 Hz tuning frequency.

Powerful Professional Low-Frequency Performance

The B&C 18SW115-8 is engineered for applications requiring substantial low-frequency output and long excursion without the excessive weight of a traditional ferrite 18-inch woofer. Its neodymium motor provides a high force factor, while the large 4.5-inch copper voice coil and ventilated magnetic structure help manage heat and minimize power compression during extended high-output operation.

The aluminum demodulating ring helps reduce distortion, while the double silicone spider and triple-roll surround provide the controlled excursion required for demanding professional subwoofer applications.

With 97 dB sensitivity, 14 mm Xmax, and 3400 watts continuous program power handling, the 18SW115-8 is an excellent choice for professional subwoofer systems where high output, reliability, and reduced driver weight are important.

Genuine B&C Speakers Replacement Driver

The Speaker Exchange supplies genuine B&C Speakers replacement drivers, recone kits, and professional speaker repair components.

Need help determining whether the B&C 18SW115-8 8 Ohm is the correct replacement for your speaker cabinet? Contact The Speaker Exchange with your speaker make and model, and our experienced speaker repair team can help verify compatibility.