I went from REF 3 to REF 3 SE by adding the extra cap.board. I know in the REF 5 SE also the outputcaps are changed , but as I don 't have these output caps anymore I was quickly ready.Did not swap the internal wiring.You all know the improvement by the extra cap.bank.
Misternice, yes tubes can change the character of a preamp.
But the 6H30s used by ARC isn't particularly common. There are only 2 brands still being manufactured and I understand they are built in the same factory. I got a set of matched/cryoed 6H30s from cryoset.
There are some highly sought after 6H30DR NOS from the 80s which are very pricey. I gather from feedback that they sound the best but they are about 10x more than the current production 6H30s. And there are a lot of fakes around so be careful where you get them from.
Reading some posts,the 6h30 DR are a huge improvement,over the standard tubes.Ill have to get some,it will play on my mind forever if I don't.I do know,with other tubes,nos, absolutely smashes the new stuff.A member on Audiogon has them.
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