B&C Speakers - 21SW115 4 Ohm Push Buttons

The B&C Speakers 21SW115 4 Ohm Push Buttons is a reference speaker in the subwoofer category. Designed for the most powerful professional broadcasting systems, it stands out for its ability to deliver impressive energy while retaining great precision in the reproduction of the lower end of the spectrum.

Its 21-inch (53 cm) cone offers an exceptional emissive surface area of 1680 cm², guaranteeing massive air displacement and punchy sonic impact. The 4.5-inch (115 mm) moving coil, wound in copper on a fibreglass support, supports 1700 W AES continuously and ensures excellent thermal stability. Thanks to a powerful neodymium magnet and an integrated demodulation ring, the magnetic flux remains stable, reducing distortion and improving the linearity of the cone's movement.

The 21SW115 delivers 97dB sensitivity and an extended frequency response from 33 to 1000 Hz, with smooth, controlled reproduction of the lowest frequencies. Its Xmax of ±14 mm allows a wide excursion without loss of control, while its robust mechanical design - aluminium basket, triple-roller suspension, front/rear waterproof treated cone - ensures remarkable longevity even in the most extreme conditions of use.

Designed for bass-reflex loads of around 250 litres, tuned to 32 Hz, this model is perfect for high-output subwoofers. Powerful, precise and extremely reliable, it's an essential choice for sound professionals.