on 5ar4, try mullard gz-34 large base. 6l6, try GEC KT-66 or W.E 350b, will give you surprise! email me direct if you can, I have more tips for you. Cheer! Hill
Hi, How big your room size? Is the tree for decorated or helping to bring better sounds? Why don't you use tube power amp? I also used AR Ref phono, I'm curious what type of tubes 5AR4, 6L6, 6922 your phono used? Cheer! Hill