You can't find real new old stock 6550s anymore. There may be a precious few here or there but the cost will be comensurately high. I don't know why you guys don't like the KT-88. It is a very good tube and the current production Gold Lions produce beautiful music in the systems I have used them in.
If you insist on 6550 output tubes they will also have to be Russian. I don't care for the 6550 sound so I can't suggest one over another. I think I have an amp that has EH6550s in it. It is in storage so I can't say for sure. I didn't like them that much I remember.
The drivers are another story good NOS should be "findable". Has an yone thought about using the KT-120s in an older ARC?
If you insist on 6550 output tubes they will also have to be Russian. I don't care for the 6550 sound so I can't suggest one over another. I think I have an amp that has EH6550s in it. It is in storage so I can't say for sure. I didn't like them that much I remember.
The drivers are another story good NOS should be "findable". Has an yone thought about using the KT-120s in an older ARC?