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In Reply to: RE: Well, Abe... posted by 1973shovel on May 30, 2013 at 14:17:56
We went from a 100mA transformer to a 10A transformer
Where does it say that a 3A unit with only thirty times then that of the 100mA transformer wouldn't have had the same effect?
I agree that more is generally better - to a point.
Follow Ups:
I'm simply the reporter here, E-stat.
I agree with you that there's generally a law of diminishing returns with most things. My Modus operandi is that if I'm building a power supply with a draw of one amp, and a 5A transformer is $20 more than the 3A, I'll go with the five amp, especially if the secondary impedance specs are listed as lower with the 5A. Why? Peace of mind, based on that quote regarding Stan Warren's revelation.
the comparison in the story is very different from what we're discussing here.
This isn't a 100mA unit vs a 10A unit. It's one with thirty times 100mA vs one with just over three times that. Big difference.
As I just mentioned to Abe in another post in this thread, McGowan's understanding (which only came later) was that it was the larger transformer's lower secondary impedance which caused the improvement he and Stan Warren heard. The amount of amperage the transformer had the potential to supply wasn't the issue.
I just woke up (5 PM, damn shift work!) and am trying to grasp your point. Am I missing it, or are we talking about two different things?
Also, there was something I forgot to mention in another post, so this isn't directed at you, E. Steve McCormack, a generally well respected amp builder, also offers the "larger transformer" upgrade for his Micro series of components, and perhaps for others he's designed. Apparently he feels the larger transformer has something to offer sonically as well.
I guess since this is all speculation, er understanding, who's to know? As Abe indicated, what would be useful would be to track multiple points along the way.
OTOH, I've read where folks have said that replacing the 2A wall wart switcher supplied with my Touch with a 3A linear wouldn't make any difference. I'm here to tell you that it did with two different models. The noise level dropped, it lost a false sense of brightness and more resolution was evident.
Hi E-Stat,You state " what would be useful would be to track multiple points along the way."
Well, actually, I DID do controlled multiple stepped listening. I just didn't go from 100 mA. to 10A. in one step. I listened in steps.
In the case of my Conrad Johnson SD-1 CD Player, I went from one power transformer, with ten year's listening time, to two, and then to three and four. Four multiple levels of increase were heard !! Three was fairly good, four was superb.
Also, when I stopped using stock Philips CD Player power transformers ( I ran out of my supply ) I was able to use multiple Signal A41-43-16s, which were at 2.68 A. "steps" of current rating. Wow, BIG BIG improvement going from one ( 2.68 A.) to two ( 5.37 A.) of those. Didn't get (yet) to try out three ( 8.05 A.) and four, but, over time, I eventually will.
One other thing you should know, I am no novice. I have over thirty years of extensive DIY design experience listening to power supplies, specifically .....their iron, and the iron in their B+ filters (chokes).
This means I am usually intuitively correct in determining, ( DCR and current-wise ), what truly cuts the mustard musically.
Regards,
Jeff Medwin
Edits: 06/04/13
with DAC and transport. We're not comparing a CD player with a mechanical transport. The last CDP I had, a GamuT CD-1, had two completely separate power supplies. One for the transport and another for the DAC each with its own transformer and filter capacitors. That is entirely understandable.
This is only a DAC with a lower inherent current requirement.
Hello E-Stat,
Yes, all along I have been talking about a CD Player, not just a stand alone DAC.
Some day, in the future, I may get to experiment with a DAC and see what that takes. CD Players generally are weak when it comes to a generous power supply, and its the first thing I will modify...starting with the AC cord !!
Glad we were finally able to communicate. Cheers.
Jeff Medwin
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