Stereolist.com Hi & welcome to AK. :wave: I'm a little slow seeing this, because I've been finding out what tubes work best "for me" in a couple pieces of gear, the MX110 (likes Telefunken & will settle for Phillips), and the Fisher KM60 (prefers Phillps/Mullards). If you want to prove me wrong, with your Genelex, you'll have to make it 3 tubes, LOL. I've been hearing a lot of Yes & Pink Floyd lately, along with the mandatory Led Zeppelin.
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Thanks