Recommendation for a highly resolving amp

@yyzsantabarbara,  X1 is directly connected to the ethernet/modem. X1 does not take wifi. Looking back, I don't think I was very clear with my intent. As many of you mentioned Pass/Don Sach are very high quality instruments and I agree. In fact it sounds VERY good-as good as my local dealer's set up with ARC Ref 6/ARC Ref 160S. But, I still feel I can better hear the "peach fuzz" and realism in music with my friend's system.

Let me get this straight. You’ve got a Pass amp and yet you don’t find it resolves enough? There’s nothing worse in this hobby than trying to throw money at an issue that can otherwise be fixed. Your buddies sound is unique to his room. First, what are you using for room treatments? Begin there. 

@chungjh I knew that was how you had connected the X1 but how are you streaming. What is the software client that you use to play music on the connected X1. Knowing this can open up some options.

Oh, the  Lumin app is running on my iPad. Works very well.

The biggest difference is in the preamplifier. The tube sound is darker, and the transistor sound has a higher micro dynamic density. So Spectral sound is more vivid. You can refer to this article to analyze your equipment.