I found it!!
I went to -output and checked -high cut!
It was somehow turned all the way to the left, dont know why cause I never touched it ....??? Could be some preset I was checking yesterday dunno
Once I turned it up somewhere around 7000 the dull sound was gone. I changed presets and came back to the first preset and it was auto matically set to 7272. Checked other presets and they all had their own settings again.
Hopefully this solves your problem also. Good luck!