OldGtrGuy
Well-known member
Lots of threads to go through on the Uber Ultra and I can't find the information. Doesn't look like Bogner has a website either.
My main question is are the tubes interchangeable? I see there's a KT88 option, EL34 and 6L6. I see people talking about even mixing EL34 and KT88. So does this amp have the bias options? Is each version actually different regarding the tubes you can use or can you just swap any tube you want?
My main question is are the tubes interchangeable? I see there's a KT88 option, EL34 and 6L6. I see people talking about even mixing EL34 and KT88. So does this amp have the bias options? Is each version actually different regarding the tubes you can use or can you just swap any tube you want?