The STEG BM4C-II two-way kit creates a three-dimensional soundstage and adds essential sonic accuracy to the musical signal.

The 100 mm (4 “) midrange driver is equipped with a water-repellent pressed paper cone: a material that offers natural sound.

The 25mm coil and titanium silk dome tweeter provide wide extension for mid and high frequencies and are optimized for off-axis output for an expanded soundstage in the three dimensions that enhances the real-life listening experience in the cabin.


  • 2-way STEG speaker set for BMW and MINI.
    • Surround loudspeaker for E, F and X from approx. 2004 BJ.

    • for X3 E83, X5 E70, X6 E71

    • 5-series E60, E61, F07

    • Z4 E89

    • i8 rear

    • Mini R60, R61

  • The set contains:
    • 2 pcs. Tweeter (25 mm)
    • 2 pcs. midrange driver (100 mm) with neodymium magnet
    • 2 pcs. Crossover
    • Plug&Play cable set
    • Tweeter mounts

Technical data of the midrange driver:

  • Neodymium magnet
  • Paper cone
  • Resonant frequency fs=75Hz
  • Impedance 4 Ohm
  • Efficiency 88dB 1W/1m
  • Maximum power:30W
  • Frequenzbereich:90-15000Hz
  • Qms:2.34
  • Qes:0.30
  • Qts:0.26
  • Mms:6.95G
  • Vas:4.97 L
  • Weight:0.38 KG
  • Installation depth:36.0 MM
  • Mounting diameter:98.0 MM

Additional information



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