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In Reply to: RE: power supply vs sound? posted by vinnie2 on February 23, 2015 at 05:35:57
...in a DHT SET amp, I would say you would definitely get more value by putting extra money into the PS (PT, choke(s) and film or better yet, oil caps) than by putting the same extra money into expensive driver and output tubes. This is assuming every part is of at least reasonable quality to start with. Of course it all matters, but with rare or exotic tubes you get into diminishing returns rather quickly, IMO. Putting just a couple hundred more dollars into the power supply is likely going to provide substantial audible (and measurable!) benefit.
It is a little less clear with PP amps with feedback, but for me, cleaning up the PS would still take precedence over buying "better" tubes. There are some really good values out there with tubes, but transformers in particular can hardly be cheap and good at the same time.
Follow Ups:
In ALL electronic setups, regardless of technology and/or topology, the PSU is the foundation upon which the entire edifice is built. You can't get good results from a mediocre PSU. A quality PSU is a necessary, but insufficient, condition for a satisfactory, let alone a superior, result.
What constitutes a quality PSU is a matter of constant bickering, on this "board". My preference is for low impedance/high current. "Different strokes for different folks."
Eli D.
...but is even more vehement about the importance of the power supply. Let me put it a little differently: "upgrading" tubes is often about incremental improvements and different flavors, but PSU mods are often a night-and-day difference in sound. Of course, sometimes it is day-to-night rather than night-to-day, but that is a different question.
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