- Jan 27, 2019
Nah. You didn’t fail I think. It’s so hard to do a true A/B test, especially with rolling tubes. I did some half ass experiment years ago with a couple of friends. By the time we got the new tubes in the amp. Biased them and reset SPL it was 20 minutes later. Might has well been 20 months later at that point. I personally didn’t hear differences. A couple of us thought we heard something different. But I don’t think anyone could say it was better with a $30 Tung Sol 6sn7 vs. $200 NOS Tube. Heard nothing different rolling rectifier tubes. My amp can take different power tubes so might have been a difference there but would want a cleaner test than we did to confirm
No but that's the thing: Having two pairs of the exact same amplifiers I (or my blind test helper) could have have switched between them basically instantly!
That was the opportunity I had. I was told there were steps I could take to make it safer to leave both amps on to switch the speaker cables between them.
But for the reasons I gave I didn't end up doing the test.