My amp came with four Billington Gold 6sn7 GT, four JJ E 34 L and four STA: Selected Tube Audio 6550 C tubes. Are these considered good quality tubes? The amp is an Audio Aero Capitole amp @ 50 watts per channel.
I 2nd Solo's comments. If you want to tube roll, start with the 6sn7's. Changing the input tubes will make a much larger difference than the output tubes.
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