If I put the same CD in my stock car system, it comes across as low level noise, not vibrations.
This is what gets me. So there’s some sound that is definitely there on the CD, you can hear it in the car, but it sounds different at home.
This I believe is what we call situation normal.
Main thing I want to know is what is the exact nature of this "noise"? Is it ringing? Rattling? Clanging? Scraping? You call it noise in the car and describe it almost as if its steady white noise, but in the home the same sound you call it vibrations? If its associated only with certain instruments and frequencies then its a distortion of some kind and the question is, what?