So, 1950's tubes made in the same factory but with different plate construction. I read about these, but never found a review until now.
I tried Syl 6SN7WGT brown base, but was too extended and thin in the highs for me. Would like to hear your review of the metal base, but they are expensive and hard to find.
Now that I've spent some time with the 1578's, the TS Round plates sound sweeter and are more holographic. 1578 goes deeper with tighter bass. I'm so.pleased with my purchase, I ordered another pair of 1980 1578's.
I tried Syl 6SN7WGT brown base, but was too extended and thin in the highs for me. Would like to hear your review of the metal base, but they are expensive and hard to find.
Now that I've spent some time with the 1578's, the TS Round plates sound sweeter and are more holographic. 1578 goes deeper with tighter bass. I'm so.pleased with my purchase, I ordered another pair of 1980 1578's.