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In Reply to: RE: power supply vs sound? posted by vinnie2 on February 23, 2015 at 05:35:57
I appreciate the replies, but no one addressed the real question.
I know a good psu is important, but what I am really wondering is do you think the psu would have more effect on how an amp sounds than what output tube is being used? In other words if you used the same really good psu for three set amps (just tweaking the B+ to fit) with different output tubes would you hear a big difference between them if everything else was equal?
Edits: 02/23/15 02/23/15 02/23/15 02/23/15 02/23/15 02/23/15 02/23/15 02/23/15Follow Ups:
Of course the power supply has influence on how an amp sounds. And depending on how deficient the power supply is, it may or may not have more influence than the tubes or circuit topology used.
But building a good stable power supply is mature engineering. Even by just copying classic proven designs one can be assured the power supply isn't a sonic deficiency to the amplifier.
Just follow standard proven engineering principles. They work for the world at large. Yes you can use the power supply to produce certain sonic colorations but IMO, that's not the intended function of a power supply.
I don't know how I could phrase it anymore specifically than I did; all other things being equal, would the design of the power supply or the type of tube have the largest effect on the sound of an amplifier?
I just can't come up with a good answer without more specific circuit information. Could go either way in my book.
This is a perfect DIY thing to try and see.
" In other words if you used the same really good psu for three set amps (just tweaking the B+ to fit) with different output tubes would you hear a big difference between them if everything else was equal?"
The distortion profile of the amp can change just from tube rolling different final tubes of the same type, not to mention different completely different finals with alternate drive requirements.
You can see this sort of thing on a PC spectrum/distortion analyzer.
What your ear can or can't hear as far as a change in something is completely up to you to decide.
Absent getting into measurement applications, you are left to your ears.
IMO/IME, having some balance between measurement and ears seems to be the way to go.
But what will be the final deciding factor? Your ears. I see measurement being most useful for helping you find out why something doesn't sound right, or perhaps for some final tweaking if you wish.
Why is this NOT surprising?
Why oh why?
I guess I shouldn't be surprised at that, but I keep hoping .....
Edits: 02/23/15
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