atisvt99: i had around 150 hours on the original EL34s when i switched to the KT90s.It's not like the EL34s sound bad it's just that the KT90s sound that much better in both triode and ultralinear mode.
I gathered the info on the psvane 1 and 2: they are incomplete valves, they go towards the middle high sacrificing the low zone .. they are out of my choice. I'm looking the tubes for my QS Silver mono KT88 (90 watt).
I have settled on the Shuguang KT88-T tubes in my KT88 tube amp (Don Sachs ~74 watts). I also like the Shuguang Treasure KT88-Z tubes but they are a bit muddled on the top end compared to the -T tubes. These are noticeably better than any PSVANE or Gold Lion tubes I tried. I am using a tube preamp as well.
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