I was in the same boat as you sir! Even so far as to pull up the Cello Audio Palette circuit diagram and see what was so good about it.
There are a couple simple solutions:
A. get the Schiit tone controls
B. get a DAC with LOUDNESS feature.
I went with an RME as my DAC, it has a unique loudness feature. Google the manual for it. It changes with volume. I also remapped the EQ front button to turn loudness on or off. I use a different Preamp.
Have fun and take care, let us know what you get. It’s a common problem.
Posted and saw your phono problem, looks like Schiit for now. Or get another Preamp. I'm A/B ing the RME, I have the Anniversary edition for the extra analog input to run my phono. Will let you know how it goes.