I just received a TAD 6V6 tube and put it in my Supro 16T single ended 5 watt amp. To my ears, a great tube. Plenty mids, nice highs, and big bottom. Compared to the Tung Sol and the JJ that were in their previously, not worlds apart. For me the Tung Sol was a let down considering how man great reviews it got. Pedestrian. Less powerful, than both the JJ and TAD. The TAD to me seems a bit more musical than the JJ. So here's the punchline. When talking about tubes, essentially your talking about what you hear. When you talk about your hear, it's part perception, part feeling and mostly made up of adjectives. So it seems like a crapshoot to read a tube review, get that tube, and be like, oh yeah, that guy on the forum was absolutely right. Even the descriptions made by the vendors are dubious. Seems like you just have to get a tube and see if you like it or see if it works with your particular amp.