Primaluna Prologue 2 Upgrades

Not parts, but I rolled tubes and the improvements were fantastic. I used all NOS made in UK around 50's Mullards / Brimars in pre and driver sections plus UK made NOS GEC KT88.
The tonality of amp become miles ahead from stock tubes, its like day and night, thats all I can say.

EL34 NOS Tesla's were very good, but not at the level of NOS GEC KT88, so, before you do any change, I hope you have the funds to do that roll. KT88 are simply much better tubes, power and delicacy, where EL34 cant match.

I also tried NOS Tung Sols 6550 Smooth Black Plates and Sylvanias, but again, KT88 GEC's simply eats them for breakfast.

Thanks Davide256

Yes, I may sound Mad, but, this is end station in tube rolling and if the OP would like to know what to do to make it better, why not this option, even it sounds crazy. You can find them in UK, some NOS, some used, but good testing, price depends and will be around GBP100 each, maybe more. There are places where you can get them in US to, but I am not sure about the price these days, as I bought them in Europe.

There are EAT KT88 as well, but I dont know if they are worth that kind of money, never tried them, besides, EAT do not build them, probably KR does, as their 300B to.