Art Audio uses Valve Arts EL34's.I had a pair of their mono
Quintet and tried some Svetlana's and they were terrible compared to the Valve Arts.Go to tubeman.com and look under catalog and then popular output tubes.I think they are $50.00 a quad
Quintet and tried some Svetlana's and they were terrible compared to the Valve Arts.Go to tubeman.com and look under catalog and then popular output tubes.I think they are $50.00 a quad