RME 2 DAC? There is no such product. Do you mean the "ADI-2 DAC FS"?
Can you please provide a picture of what you mean?
Maybe a screenshot of the relevant "ADI-2 Remote" settings (remote control software for ADI-2 DAC/Pro *, ADI-2/4 Pro SE).
The ADI-2 Pro FS R BE is not that different, and I can change Bass / Treble settings between -12 and +12dB without issues by turning the encoders B + T on the right side of the unit.
BR Ramses - UFX III, 12Mic, XTC, ADI-2 Pro FS R BE, RayDAT, X10SRi-F, E5-1680v4, Win10Pro22H2, Cub14