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Why Does the Turn Signal Sound Get Louder After BMW Audio System Modification?

1 Answers

MacReese

07/29/25 2:41pm

After modifying the audio system in a BMW, the turn signal sound becoming too loud may be due to excessive DSP gain. Reasons for the louder turn signal sound: This is caused by improper adjustment of the output signal between the added DSP amplifier and the head unit during the modification process. Solutions: 1. Appropriately reduce the DSP power, setting it to achieve optimal effect when the volume energy bar is at 60%. If adjusting the DSP power doesn't work, it's necessary to visit a professional repair facility for RTA debugging using specialized software. 2. Perform precise settings for crossover, delay, EQ, operating points, etc., to ensure the head unit, amplifier, speakers, and vehicle's acoustic environment work in harmony.

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