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?
I have a rockford fosgate 650w in my 2011 eclipse GT. It’s quite frankly good enough for me as it is. It’s got a 10 inch in a scealed enclosure and it’s loud enough to shake the mirrors pretty damn good. Well balanced, too. For a setup that’s 12 years old, it’s very well put together.
The only downside is the amount of rattles in the car.
It might not be super impressive to the average basshead, but it’s by far the best one I have ever heard as a factory setup.