Hi
low levels depend on:
-input level (check the source feeding the H8000)
-algorithm level (should name which presets you are using)
you should try loading the THRU preset in both dsps and check the audio levels then.
You can't boost a digital level. Whn it's at 0 dB …that's it. The source level is what needs to be boosted/raised.
best
I
