I just bought a PS Audio preamp that uses 12au7’s in its input section. I put out a
some feelers and was given advice from A to Z. So far I’ve tried the PSVANE Art Series, the New Release Tung-Sol the Gold Lions and some NOS RCA Clear Tops.
To my ears, The PSVANE Art Series were just okay. The Gold Lion were definitely better. The Tung-Sol and the RCA Clear Tops are definitely the best so far, but I want to give the top three tubes 100 hours of play before I A/B them again.
BTW, what are you using them on?