Proposal:

Last time I had a nice audio system in my car, some SOB broke into that car and stole it.  After that, Quoth The Raven, Never More!

JD

Gordon Holt said it right 30+ years ago, "Quality audio in a car is like Arpege in a glue factory"

I'll contribute my amp suggestion to the unneeded car audio forum thread

Milbert  vacuum tube car amps

https://milbert.com/

I heard a full setup years ago, and was blown away by the performance. I don't mean silly loud, thumping but convincing sonics clearly above the average "hi end" car audio setup.