Impressions are funny, and I can find my own changing a lot from time to time.It's funny how my impressions of B6s are different from yours. If anything, it's the high end which is lacking a little, and low and midrange are great. What I like about these speakers is that no matter how much I turn the volume up, they sound pleasant and controlled.
I was just driving my wife’s car the last time I did I set the EQ back to flat. That time, I felt even with EQ flat, there was a lot of bass, not unpleasant.
Tonight I was listening to random music and it sounded “thin” annoyingly so. I assumed someone had cut the bass. Nope, EQ still flat.
I have no idea the cause of this perceptual shift. My only theory was that this time I was driving highway, much noisier with wind and road noise. This might have biased my hearing.
Our brains basically have a real time analyzer and an active EQ going at all times
It works relatively quickly to “normalize” the frequency response we hear.
A demonstration of this that boggles my mind is to crank the bass on a playback system, listen for 30 secs or so. Then put EQ back to where it was, and it will sound very “thin.”