Greetings!

If it is any help, I use them in my own car. They help mask the problem. They do not fix the root cause (I have not tried to find that yet...), but they do help. And, I know what you mean - I am a little ashamed of the sound of my install too because of it.
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Paul Grzelak
200GB with 48MB RAM, Illuminated Buttons and Digital Outputs