I don’t have much experience in high-end luxury cars but I have owned a spectrum of brands from European,domestic and Japanese manufacturers.
Honestly I have never been impressed by a factory system. The H/K in our older Mercedes was a joke. We all know Bose is a gimmick. I’ve heard the Fender systems are pretty good but I’ve never had the chance to demo them.
The best I think I’ve heard is the Logic 7 in BMW.
What are some of your favorites?
Had a 2011 Audi A4 and the B&O system was surprisingly good.
However, the B&O system in the more recent Audis (2016-present) are sadly a down grade. They’re now too boosted in the treble and bass, I get why they did it. But it sounds worse.