I use this tube and like it a lot. I haven't done any tube comparisons so I can't say how it compares with JJ's or the TJ music version. I like it much better then the sovtek it replaced. Made the sovtek seem like a toy tube in comparison. This is a big tube about 6 inches tall and can handle a bias wattage of 28 watts continuous. The seller
www.usatubes.com has the data on the tube and claims that at a 28 watt bias it puts out 9 watts. The Stereomour which I have is biased at 15 watts and at 15 watts it puts out the standard 3.5 watts. I think its similar to JJ's in that it can be biased up to 28 watts for more than double the power of the standard 2a3.
