Holland - period.
Also stick with E88CC/6922 if you want full/balanced mid-bass with less than a WAY full range speaker setup sans subs.
You might also look into current production (based on some online assessments).
I stopped using 6922 types 15-20 years ago, but acquired/listened to pretty much everything and sold in excess of 50 matched pairs as well as gobs of singles (some of them here on A'Gon, though Ebay was the main venue).
Don't know if stock is still floating around but Richardson Electronics purchased the Amperex namesake and their tubes could be ANYTHING (go by the etched codes or use a reputable dealer).
DeKay
Also stick with E88CC/6922 if you want full/balanced mid-bass with less than a WAY full range speaker setup sans subs.
You might also look into current production (based on some online assessments).
I stopped using 6922 types 15-20 years ago, but acquired/listened to pretty much everything and sold in excess of 50 matched pairs as well as gobs of singles (some of them here on A'Gon, though Ebay was the main venue).
Don't know if stock is still floating around but Richardson Electronics purchased the Amperex namesake and their tubes could be ANYTHING (go by the etched codes or use a reputable dealer).
DeKay