BMW is a very popular German car, the market has a large amount of maintenance, and many BMW cars will encounter a lot of debugging problems when the car audio is modified. The problems are as follows: For example, the BMW car's door is a 4-inch mid-range speaker, low frequency. The lower limit can work up to 200HZ, while the traditional 3-way frequency is only 3 inches. The standard lower limiter is generally divided into 500HZ. After changing the 3-inch mid-range speaker, there will be a broken band between 200-500HZ. The 6-inch mid-woofer is mounted under the seat and affects the mid-range response. Connecting the crossover further limits the play of the mid-low frequency. The solution is as follows: 6-inch bass is active. The power amplifier hits Qualcomm, and the intermediate frequency naturally declines due to the sound absorption effect of the seat.
The B-way all-pass passes through the crossover, passively pushes the high-pitched sound, and the A-way Qualcomm actively pushes the bass! This is the semi-active crossover, and the above methods hope to give you some inspiration! If you have more and better ways to welcome everyone to discuss the message!
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