top of page


Premium sound for premium cars...

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 coaxial system BM4 with car-specific baskets provides much better precision and dynamics across the whole frequency combined with a fantastic treble resolution thanks to its 13 mm silk dome tweeter.
Especially in combination with one of our DSP amplifiers, these speakers reveal their full potential in respect of dynamics.

bottom of page