BM4C

The basic speaker setup in BMW vehicles does not meet the expectations of ambitious music lovers in many cases. For all those, the tailor-made STEG UPGRADE speaker systems offer the perfect alternative that opens new horizons of sound.
The 2-way component system BM4C with car-specific baskets provides much better precision and dynamics across the whole frequency range combined with a fantastic treble resolution thanks to the 25 mm silk dome tweeter. Additionally its level is adjustable in three steps according to personal listening preferences.
Especially in combination with one of our DSP amplifiers, these speakers reveal their full potential in respect of dynamics.