I tried a Tung sol in V1, and didn't like it. It had a muffled, dry, less gain quality with that tube. It could have been my ears that day. haha Nonetheless, I threw the JJ back in. I have Tung Sols in the power section, and Tube doctors also sound great in the power. I have them in my dual rec now. I haven't tried JJs yet for power. I HIGHLY, I mean fuckin HIGHLY, reccomend getting the bias mod. The fizz is GONE, with the bias hotter. Best tone I've ever had with the mod.