The KEF R400b is a powered subwoofer engineered to complement high-fidelity speaker systems. It features dual 9-inch bass drivers with heavy-duty constructions that allow for extensive movement and optimized performance in the low-frequency range. With a sealed enclosure design, the R400b minimizes distortion and provides clear, impactful bass response. The aesthetics of the R400b include a modern, polished look available in high-gloss finishes of black or white, enhanced by sleek metal strips. The unit uses force-cancelling drivers arranged back-to-back to eliminate cabinet vibrations, ensuring that bass output remains clean and precise. Boasting a frequency response from 26Hz to 140Hz and a maximum output of 111dB, it is powered by two 250W Class-D amplifiers. Users can customize their listening experience with a variable low-pass filter (40Hz - 140Hz), phase settings, and equalization options, making it adaptable to various room environments and personal preferences. Its compact dimensions (365 x 330 x 351 mm) help it fit seamlessly into living spaces while delivering rich bass that enhances music and movie soundtracks alike.
