ano ba mas maganda tumunog na circuit for multiple tubes, parallel class A o push-pull?
to me, nothing beats a single tube in single-ended mode.
multiple tube designs are a compromise for lower sensitivity speakers, and that's why we have parallel single-ended and push-pull.
here's my take on the matter:
push pull design splits the signal out-of-phase (negative and positive) and reconstructs them (reassemble). tubes must be matched pair and must be kept if sharing the same bias, hence individual adjustable bias to compensate for tube drifting. purists and KISS people do not like this splitting/reconstruction phase and avoids such designs.
single-ended triodes, albeit their lower power, keeps the signal intact.
some groups subscribe to the idea above, and use parallel output triodes, to achieve higher (double) power, reason why some people prefer PSE designs over PP. with the transconductance doubled, and plate resistance halved, it may sound sonically superior over PP. however, there is a general theory that parallel designs don't sound as clean and pure as single-output tube designs, because the final output is influenced by the characteristics of each of the output tubes and coined a term called "muddying up the signal." again this is debatable, urband legend or not, as PSE designs are used by even high-end amplifiers such as the Kondo Neiro which uses 2A3s in PSE configuration.
paralleled tubes must be matched properly to avoid "muddying up."
to confuse you more, there are parallel single-ended push-pull designs. with so many tubes, keeping them matched over time will be terribly difficult.
sometimes, we are greatly influenced by "power" rather than tonal balance, clarity and detail. sometimes, we want bass, overpowering at times, and we like that at the expense of balance, naturalness of the music.
in the end, only you can decide, regardless of the topology, what you will buy. topology can be thrown out the window.
