I have a PrimaLuna Prologue Premium integrated since 2018. No tubes changed.I have the original Chinese tubes but I bought Golden Lion KT 77 and 12au7. Yes the sound is different, a bit more transparent but this integrated is sensible to power cords and fuse, yes fuse. The PLPPi drives my Magneplanar LRS quite well but not at deafening levels, easily at 85 db. SPL. I would probably stay with EL34 power tubes. Sometimes when the planets are aligned :-) it sounds so well and it never sounds bad. I also have a Moon 250i and I prefer the PrimaLuna being less analytic and more musical.
Primaluna?
I’m thinking about giving a full tube setup a go and Primaluna in particular. Looking to hear people’s experiences with Primaluna in general. My main draw to them outside of tubes is there auto bias and protective features. Wondering if people generally replace a single bad tube or if people are replacing all tubes of that type when there’s a failure. Also would be interested if there were any other companies with at least a similar protective feature. The auto bias sounds great but the protective features are a bigger deal to me.