Lamm ML2.1 Tubes

Thank you Pierre for the New Sensor - Mullard ECC83/12AX7, didn't know that.
Thank you Triode, I will try to get some info about the difference between ribbed/smooth plate.
Thanks Rcprince, too. Well, honestly I don't want to change something, probably a bit more of everything. I have some Tele 12AX7 from my former Aesthetix Callisto, they've been really expensive. I listened to them now for 2h and yes, they are different to stock, but the price is 10x+ ....

I have the same opinion as you. After trying NOS Tele's and NOS GE's, I've decided the stock tubes sounded more like I wanted to hear. I must not have those golden ears or in the Lamm ML2.1 circuit design there's no improvement to be gained. I'm not selling those Tele's and GE's just in case.

I prefer the Amperex 12AX7 long plate D getters in my ML2's. These seem to have the best combination of clarity and bass. I liked the midrange of the Telefunken smooth plates but theywere too light in the bass in my system. Unfortunately the Amperex will set you back a few hundred dollars.

Dear Gerry, yes, the "Upgraditis" is like a wave, up and down, thank you Dmailer for your experience, Amperex is an interesting choice.