Best tubes for sonic frontiers power 2?


What is the best sounding tubes for SF power 2?
6550-Svetlana,Tung-sol,Electro harmonics gold,Sovtek or
Genelex gold lion KT-88. Is KT-88 better than 6550?
I am using Svetlana 6550c right now.
If its sound better but is it reliable?
and What is the best input tubes? I got Sovtek 6992.
THANKS
ellyjr

Showing 1 response by radicalsteve

I changed winged Svetlanas for the new Tung-sol 6550's in my Power 3's and they are a much better tube all around. Better low end definition, smoother mids and extended, sweeter treble. A significant upgrade and I was surprised that a variant power tube of the same type would have made such a difference. I am very partial to the KT88's as well as I think they are a little "sweeter" than 6550's, but I never tried them in the Power 3's.