May I ask which sound system you have? The standard High Performance Audio or Harmon Kardon Premium Sound?I recently took delivery of my car and have been enjoying the sound system: the car interior is noticeably quieter than my last car, and the audio quality is better, so overall a big upgrade for me.
However, I feel like better sound could be achieved with this system (for me, better = flatter frequency response curve). I find the bass is hyped a lot, and even when turning off the subwoofer, turning bass level down, and lowering bass in the advanced graphic EQ, there is still a lot there. I find the graphic EQ changes are too subtle overall.
I would love to see a "reference" setting, where instead of a hyped, showroom-demo style EQ curve, you get one aiming to behave more like a studio monitor, to whatever degree it can.
Has anyone done any experimenting in this regard, i.e., trying to squeeze the most faithful sound out of the existing system? If I can find time I might measure with a spectrum analyzer and see what settings get me closest to flat.