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RE: Initial A/B test between PP and SE 6bq5 amps

I'm sure you have noted - which may be why you are asking - that others have noticed differences between tubes. Hell, I can tell the difference between 2A3 brands and cathode capacitors... significant, but not changing the presentation at a gross level - I could like with any of them (though as time goes on, I increasingly dislike the Mundorf Evo Oil in the 2A3 cathode bypass spot).

Perhaps in your case - with your musical preferences/orientation, systems, implementation - the differences between topologies are more significant than the differences between tubes.

So much could be influencing the outcome, your perception of it, and you conclusions. I don't have the time or experience to dive into a thorough examination of what might be going on. From memory, your builds seemed ad hoc; still, you were excited to have noticed some sonic differences between builds. Perhaps not as great as the differences between topologies (surprise - that's why each topology has its advocates), but greater than "quite small, like maybe a little better bass".

I will be building a SET that uses the same the tubes as my current amp - but uses a more "evolved" approach - and am interested in hearing whether the evolution is for the better, worse or simply makes minimal change.


"Confusion of goals and perfection of means seems to characterise our age." Albert Einstein

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