I recently re-tubed my 2 ARC Classic 120 monoblocks. I buy from the Parts Connexion, 16 6560c Svetlana`s, 20 tubes total for about a reasonable $450, (I requested and got matched quads).
I too was going to try KT88`s but at the last minute I found out you have to move a wire in each socket if you change to KT-88`s, something I can`t do.
This is my fourth set for these amps and I`m very satisfied with the Svetlanas, your situation with a ref 600 may be different,
Len W
I too was going to try KT88`s but at the last minute I found out you have to move a wire in each socket if you change to KT-88`s, something I can`t do.
This is my fourth set for these amps and I`m very satisfied with the Svetlanas, your situation with a ref 600 may be different,
Len W