Weak Headphone Output

  • I used Beyerdynamic DT770 - 80 Ohm headphones. I seemingly standard for my studio applications. I'm finding that when I use headphones on my Kemper that I have to crank the output volume to around -7dB to get it to be a relatively high level in my headphones. I feel like it didn't use to be like that. Also when i use my Sony headphones i don't have to crank it nearly as high. Is this an issue with the impedance of the headphones or is that a normal level to have to use? For reference, I'm usually about -20dB when going out of the main outs into my DAW interface.