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APBMW K4E Kit | 100 W Peak Power | Kit 2 way 4 ohm | BMW Upgrade

The two-way APBMW K4E kit creates a three-dimensional sound stage and give the musical message the essential timbre accuracy. The 100 mm (4 in.) midrange is provided with a water-repellent pressed-paper cone, a material providing natural sound. It features a low resonance frequency that allows hi-pass cut-off in the 150-200 Hz range for an excellent mid-low reproduction. The 25 mm coil and Tetolon dome tweeter features a great extension on both medium and high frequencies and is optimized for off-axis output, for an extended sound stage in the three dimensions, that amplifies the perception of reality in the car cabin.

Technical Specs

Woofer Size 100 mm
Tweeter Size 29 mm
Woofer Voice Coil Diameter 25 mm
Tweeter Voice Coil Diameter 25 mm
Magnet Size Woofer 50 x 29 x 3
Power Handling - Peak 100 W
Power Handling - Continuous 50 W
Sensitivity 89 dB
Impedance 4 Ohm
Frequency Response 90 ÷ 23k
Crossover Woofer Hi-Pass: 6 KHz @ 6dB/Oct.
Adjustment Tweeter Level -3; 0
Woofer Cone Diameter 80 mm
Xmax Woofer 0.5 mm

Electric-acoustic Specs

Re Woofer 3.3 Ohm
Fs Woofer 90 Hz
Le Woofer mH @ 1 kHz 0.32
Vas Woofer 1.8 l
Mms Woofer 6.3 g
Cms Woofer 0.5
Bxl Woofer 4.8
Qts Woofer 0.48
Qms Woofer 8.2
Spl Woofer 88 dB


Weight Woofer 0.46 kg
Weight Tweeter 0.06 kg


Specially developed to fit the midrange and coaxials on BMW models equipped with non-standard fixings.
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  • Specially developed for the upgrade of BMW-Mini featuring
    factory 2 way systems, to create an extended sound stage in
    the three dimensions, amplifying the perception of reality in the
    car cabin;
  • Neodymium Magnetic group to maximize performance while
    minimizing bulk and weight;
  • 25 mm (1″) fiberglass woofer voice coil for high power
    dissipation and stiffness;
  • Waterproof pressed-paper cone for medium natural
    frequencies free from any plastic resonance;
  • BMW-Mini compatible aluminum die-cast basket with Plug &
    Play connectors;
  • 25 mm Tetolon coil tweeter with dispersion characteristics
    optimized with FEM simulations;
  • Tweeter support supplied for Plug&Play OEM placements;
  • 30 cm extension provided featuring Plug & Play connectors,
    for high flexibility of installation;
  • Damping removable motor cover;
  • Crossover equipped with high-quality components and
    Plug&Play connections.

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