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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: Does SIZE matter?? posted by jedrider on October 7, 2012 at 13:52:04:
From a May 2000 Stereophile interview (link below):"Way back when Stan and I were partners"I was the "P" of PS Audio; the "S" was Stan Warren, who's off doing his own thing in Eugene, Oregon"I experienced a classic case of the value of listening to things as opposed to just trying to pencil everything out. We were just making preamps and phono stages, I don't think we were making a power amp at the time, and Stan called me into the listening room saying, "You've gotta hear this."
He sat me down and played me an LP.
I said, "Yes, that sounds fine."
Then he did a classic A/B"it was one of the biggest jaw-droppers I've ever heard.
"What the heck did you do?" I asked. We were listening to a phono stage, and I figured he'd done something to the circuit, because each one of us was playing around with circuits at the time.
"I changed the transformer!" he said. "I couldn't find the appropriate small little weeny preamp transformer we would normally hook up, but I found this large power-amp transformer that happened to be exactly the same voltage. I hooked it up and you heard the difference."
The only thing he did was change the transformer. We went from a 100mA transformer to a 10A transformer"exactly the same voltage, the circuit was drawing no more current"and the difference was just staggering. To this day it's one of the biggest differences I've ever heard.
We scratched our heads, we asked everybody we could, but neither of us had a clue why we could hear such a big improvement from the bigger transformer. We couldn't measure any difference, but we said, "What the heck, it works." So we began producing what we called the "High Current" power supply, an add-on box. We built 'em for years, actually, before we finally figured out what was happening. Which was the large transformer's very low secondary impedance, maybe under an ohm, whereas it's of the order of 35-50 ohms for a small transformer with the same voltage."
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Follow Ups
- According to Paul McGowan of P.S. Audio... - 1973shovel 10/8/1208:42:01 10/8/12 (6)
- Thanks for the link. :-)) ... - andyr 22:23:16 10/27/12 (0)
- Stan was the first person I remember saying the power supply is in the signal path - Mike B. 10:27:03 10/10/12 (0)
- That is very cool to know. Thanks for posting it. NT. - Elizabeth 17:29:41 10/8/12 (2)
- You're very welcome. The only problem is - 1973shovel 09:02:45 10/9/12 (1)
- Yup. I would say "nice setup..." nt - Elizabeth 17:48:29 10/12/12 (0)
- RE: According to Paul McGowan of P.S. Audio... - unclestu 14:07:52 10/8/12 (0)
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