Originally Posted by DKJones96
Can the tube really be that imbalanced?
Yep, even if it's supposedly "matched". From what I recall from the old SOHA Mk. I threads, low-voltage amps like this use the tubes outside their intended design specs, so even with tubes that have been "matched" at more normal operating voltages, "your mileage may vary".
I still haven't installed trimpots in mine yet (too busy listening to it, and trying to debug a retarded USB connector issue on another project), and am just using, I think, 470ohm resistors in each side. So far most of the tubes I've tried haven't had any audible inbalance, and the one that did - a "matched" 6DJ8, actually - was slight enough that it was correctable with a little tweak of the Windows balance slider. Maybe I'm just lucky, but all the tubes I've measured have been within 1V, section-to-section.