Critical Tuning Considerations for BMW Car Audio Upgrades
The BMW is a best-selling German car with a large market presence. Many BMWs encounter specific tuning challenges during car audio upgrades. Issues include: The door-mounted 4" midrange speaker operates down to 200Hz, while typical 3-way systems use a 3" midrange with a crossover point around 500Hz. Replacing with a 3" mid creates a gap between 200-500Hz. The 6" midbass installed under the seats suffers from midrange absorption effects. Adding passive crossovers further limits midbass performance. Solution: Run the 6" midbass actively. Set a high-pass filter on the amplifier; the midrange naturally rolls off due to seat absorption.
Route the full signal (Passive Path) through the crossover to power the mid/highs passively. Route the high-passed signal (Active Path) to actively power the midbass! This constitutes a semi-active setup. The above method offers one approach. We welcome further discussion and better solutions in the comments!
Route the full signal (Passive Path) through the crossover to power the mid/highs passively. Route the high-passed signal (Active Path) to actively power the midbass! This constitutes a semi-active setup. The above method offers one approach. We welcome further discussion and better solutions in the comments!