I am really new to tube amp and just recently purchased the Wooaudio WA6SE. I really like the amp but I notice that two stock driver tubes do not glow equally.
The tube on the left side glows significantly brighter than the right one. I turned the amp off, waited for both tubes to cool down and swapped them but the result is the same. The left tube is still brighter than the right one even if I swapped them.
I start burning-in for about 20 hours and have not noticed imbalance between left and right sides yet. I am worried if there is anything wrong with the amp unit. Can anyone share me what goes wrong?
Thanks in advance!