The BM 100 FS is a tailored 4″ component system featuring separate 100 mm woofers and 25 mm soft-dome tweeters, each paired with 6 dB/octave in-line high-pass filters. Engineered for BMW and MINI vehicles, this kit delivers 50 W RMS (100 W peak) output with 90.3 dB sensitivity, operating across a broad 80 Hz–30 kHz range and presenting a 2 Ω load
Praised for its quality craftsmanship, the woofer relies on a fiberglass-reinforced composite basket, treated cellulose cone, butyl surround, and Conex spider, driven by a 25 mm Kapton voice coil and 70×15 mm ferrite motor on a robust 4 mm plate. A dual BMW plug ensures truly plug‑and‑play fitment with factory wiring—no modifications needed .
Designed and manufactured in France by BLAM Audio, and distributed in the UK by InCarTec, this kit is trusted by installers and OEM specialists looking to upgrade door-stage systems in BMW & MINI vehicles.
Are 10cm/ 4 inch speakers good for my vehicle?
4-inch or 10cm speakers are a compact audio solution that delivers impressive sound quality in a small package. Ideal replacements in popular smaller 3-door cars like the Vauxhall Corsa D and select Alfa Romeo, Fiat, and BMW, these lightweight speakers can easily be installed in rear doors, ensuring an unobtrusive fit. Despite their size, they produce powerful and immersive audio, making them perfect for music lovers who seek clarity without the bulk of larger equipment. Whether you're upgrading your vehicle's sound system or simply looking to reduce the size of your car audio set up, 4-inch speakers provide a remarkable audio experience that doesn’t compromise on performance.
What size speakers are in my car?
If your unsure what speakers fit your car we would recommend using our market-leading Search By Car feature
Brand: BLAM
Car models: The years stated refer to the model's years of manufacture, please check the item description for information about any changes there may be within these productions years.
BMW - 1 series (E81/E82/E87/E88) (2004 - 2010 )
BMW - 3 series (E90/E91/E92/E93) (2006 - 2011)
BMW - 3 Series (F30/F31/F34) (2012 - 2019)
BMW - 5 Series (E60) (E61)* (2004 - 2010 )
BMW - Z4 (E89)* (2009 - 2016)
Mini - Clubman 2nd Gen (F54) (2015 >)
Mini - Countryman 2nd Gen (F60) (2017 >)
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