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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: That has been my experience as well posted by E-Stat on June 17, 2016 at 12:41:08:
Powering a digital system using a linear PSU is not something new, and maybe it was the first way to do it, before the SMPS use it took over such approach. A SMPS it have its advantages, as low costs, high efficiency, no heat dissipation, good control and regulation. It have also a big problem, especially when to use it in an audio related device: the SMPS output a quite high level HF/EMF noises. As I could see myself, there is not possible to get completely rid of these noises, and their levels are (at least in my opinion) unacceptable for a hifi device environment.
Well, the noise problem of an SMPS it should not matter so much when about to power a digital system, as a such system it is noisy by itself/definition. Complex switching processes, at huge speed in such circuitry, it generate lot of HF noises, which it goes into the power system and it propagate everywhere. I had myself this point of view about using a SMPS for a digital system, until I experimented myself with a linear PSU to power a digital stage. First I used a linear PSU to power my own Agilent scope (this quite simple mod it generate a storm on Agilent scopes forum, at that time...), and then I designed myself one to be used for Oppo players. The result it was/is very obvious: dramatic improvements for the quality of the processing, and at least for the final outputted signals.
These improvements were also noticed by others who experimented in the same field. So the conclusion here it may be clear enough: for best results when using a digital system, is to power it from a very quiet PSU, as a linear one.
Edits: 06/17/16 06/17/16
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- RE: That has been my experience as well - Coris 14:05:31 06/17/16 (0)
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