I went to Genalex Gold Lions on my CJ Premier 11a and a friend went to the same manufacturer's KT77s in his Quicksilver monos. We are both happy with the improvements.
If there are significant additional improvements to be had from original vintage NOS Gold Lions I don't really want to hear about it, given the relatively huge prices asked for those tubes!
If there are significant additional improvements to be had from original vintage NOS Gold Lions I don't really want to hear about it, given the relatively huge prices asked for those tubes!