This is confusing and comes up on the Facebook site occasionally. I spoke with the Japanese exporter and he claims the amp can be upgraded to the X version. The importer says it can’t be done.
In any event I have some tubes left from when I owned this amp. A matched quad and a half dozen NOS tubes. Let me know if you have trouble finding them.
In any event I have some tubes left from when I owned this amp. A matched quad and a half dozen NOS tubes. Let me know if you have trouble finding them.