Vali 2 outputs a little over 5 ohms on high-gain. No tube is going to change your poor damping factor. Also whoever told you to have low source volume was wrong. Source volume should be 100% and you should be using your amp to adjust the volume - not the other way around. In-fact putting an amp at 100% is rarely desirable for a few reasons.
3/6/16 at 11:29am