You need more bass than the original BMW 6.5” underseat woofers can deliver? Or you like to install an amplifier with more output power than the original subs can handle? The MS 8B-BMW.1 will then be the perfect choice for you – a pair of powerful 8” / 200 mm woofers that replace the original ones without the need of any other mechanical modifications. The highly efficient fringe-field neodymium magnet systems in combination with large voice coils can easily deal with up to 100 WRMS amplifier power per channel, giving you the right bass kick.