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In Reply to: RE: Dual PS - Worth the Trouble? posted by Triode_Kingdom on June 16, 2016 at 15:15:54
I am not as knowledgeable as most or all of these brainiac audio people but I know what I hear.
My experience with monoblocks as compared to building one huge massive low resistance power supply is that the single power supply in anything I ever built(preamp, amp) was a noticeable difference because things seemed to be more coherent with a single power supply. I even built the same amp(this is going back years ago)in mono's with massive supplies all measuring well within range to each other(voltages super close, current draw super close)and it seemed the single power supply was more coherent than dual. It always seemed that the monoblocks seemed a bit smeared.
Now! With that said! I can't answer for a dual supply in a single amp or preamp but if it has the same principles, then a single power transformer would sound better to my ears.
I am sure there will be those that will disagree but their ears aren't mine.
Follow Ups:
My experience with monoblocks as compared to building one huge massive low resistance power supply is that the single power supply in anything I ever built(preamp, amp) was a noticeable difference because things seemed to be more coherent with a single power supply. I even built the same amp(this is going back years ago)in mono's with massive supplies all measuring well within range to each other(voltages super close, current draw super close)and it seemed the single power supply was more coherent than dual. It always seemed that the monoblocks seemed a bit smeared.Exactly...When you have the option to build dual mono,it is always going to be better than a single power supply shared between 2 channels. Stereo amps are compromised somewhat and that's the nature of the beast but the new caps do help along with splitting the channels like we do on the Mc240s and Citations with the level 2 mods.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
Edits: 06/17/16
I can 100% state that blanket statements are always false :-)
There is nothing inherently better with 2 versus 1 if designed properly, 1 is most likely better than 2.
"There is nothing inherently better with 2 versus 1 if designed properly, 1 is most likely better than 2."
Is that your subjective impression or was the statement meant to be a technical assessment?
If technical, can you give us the facts?
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Mainly subjective, I said that both are good however two transformers is not ALWAYS better than one.
Technically, 2 completely independent amplifiers will be un affected by each other so you will get absolute channel independence and no chance of power supply modulation of one amp to the other unless you are dragging down the power line.
However, if trying to recreate a stereo image of a dude playing an acoustic guitar being recorded by a pair of microphones in that sound field, we are trying to reassemble a single image. Having both channels working off the same power supply helps to bring commonality to both channels to make them sound more like one sound, not two separate sounds. I would rather have any power supply anomaly present equally in both channels than one amp sounding different than the other.
I have pure dual mono and shared power supply amps and frankly sometimes the dual mono seems to have a more artificial separation of the channels. If recreating a stereo image close to how it was recorded is the goal, a well designed common power supply will be more likely balanced between the two channels and have fewer chances of ground loop problems. My preference is a big-ass independent power supply to keep the big power transformers away from the signal.
.
Have Fun and Enjoy the Music
"Still Working the Problem"
Chip
If you have a dual power transformer and dual separate for each channel,I would agree..
Case in point..I posted a Mac Mc30 the other day pushing 48 watts at.1%. If that was a single supply pushing two channels in a stereo amp at the same time,it would have a hard time making those numbers.
With a big enough power transformer that deliver enough current for two channels and a well isolated supply,you would have a better chance but as a rule commercially designed amps don't work that way. A custom amp is a different story.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
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