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?
We have an upgraded Bang & Olufsen in our Audi, and I’m sure it sounds better than the base model stereo, but it’s not my favorite. It’s so fatiguing to the ear! The bass just hurts your ears if you turn it up to sing. The “Surround sound” effect is also fatiguing and adds a lot of high-end shrillness. I’ve had to dial everything back past the center EQ to make it tolerable. Now, with almost all of the EQ settings dialed down, it doesn’t sound too bad.