I know what you mean. I go direct from my Vivaldi stack with 2V to my Tenor Amp which has a sensitivity of 1.3V. However, occasionally I feel the need to push the dCS up to 6V for an extra kick.
There’s a downside to that though, superficially the 6V sounds punchier, but I once measured my speakers with both the 2V and 6V settings; with the volume knob to level things, the necessary digital attenuation being higher for the 6V setting, dynamics seems to suffer measurably.
I posted about it back in the “6V vs 2V” thread from 2020.