I even't compare before the tube device in different state of the equipment but the tube amp is pure analog so the best position is still on the last state that directly output to speakers
Isn't it the tube amp is old design a lot of it can't support above 20k frequency which not hires compatible. The hi Res autdi main advantage is can produce higher frequency range but a lot of devices not supported that will makes the music clipping in high frequency or sloop down became unable to hear or feel.
