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I have a new 2022 Outback. The speakers are harsh. I asked about upgrading in a sound quality forum on FB. Was told that I needed a DSP before I did anything. Now I am sure this would make a big difference but I dont want to get that involved right now. So I did my own thing. I measured the car and did a distortion sweep. High (2 to 3%) distortion at 2 to 4khz. The single cap was not bringing the level down enough on the tweeter. I pulled the tweeters in the dash, a $1 1/2" mylar special, and replaced them with a Vifa BC25 I had on hand. Much better sound. I used a 2nd order crossover with a resister to bring the level down. I still think that there is something not right about the system. But measuring in a car is not easy!