Sound Quality Vs. Measurements

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Are you serious about a shunt regulator for a power amp? The shunt needs to be scaled to the peak current to work.

Yes, though it would have to be a dynamic shunt regulator, keeping just enough shunt current to preserve regulation. Pass does a sort of dual of this as a dynamic current source in his Aleph J single ended class A amplifier. He also has a patent on it.
 
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Getting an amplifier to work nicely with a power supply doesn't require extreme measures - though it may help to go completely OTT to see what matters in a situation (hmmm, wonder what abraxalito's doin' at the moment, :D) - once the key factor is isolated then one tries to use smarter and smarter methods to get the same results ... the important thing is to get the interaction which is disrupting the quality of the system under control ...
 
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PSU , you want PSU ......... :)
RP audio - Série 5 Soulution - 530 INTEGRATED

Ohhh and for the digitalis .... : http://pitchfork.com/features/articles/9467-wax-and-wane-the-tough-realities-behind-vinyls-comeback/

Supposedly,
Acoustic Sounds did some modifications to their pressing machines to eliminate vibration during the cooling of the vinyl, with the idea this could reduce surface noise. The projects done there have so little surface noise that the electronics proved to be the noise floor.

http://store.acousticsounds.com/
 
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Montis

I found it.
 

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Yes, though it would have to be a dynamic shunt regulator, keeping just enough shunt current to preserve regulation. Pass does a sort of dual of this as a dynamic current source in his Aleph J single ended class A amplifier. He also has a patent on it.

I'm not sure how that can really work. Even if you are focused on AC only a shunt can only sink current. if the amplifier "unloads" the power supply generating a transient then the "shunt" needs to pull the current that the amp stopped pulling. After a 30A peak into a low Z speaker the shunt will need to pull an equivalent amount of current even if actual voltage regulation isn't a goal. you could try to push a cancelling current via a cap back into the supply rail to reduce the noise. it would only work to some moderate frequency.

I think Nelson's cascoded output concept (stasis) is a better solution for this if its really important. Otherwise use a real regulator on the voltage amp and call it done.
 
So buying faster brings you a better product. I did not know that.
I waited for my Dutch leather couch for 9 month and i prepaid because i wanted an unusual aubergine color.
My son and children will likely sit in there in 30 years.

I for one completely understand your logic.

In 1961, my father bought me a large work table, reasoning that he didn't know what I'd be later on, so I better get used to a large table I could draw and work at. It was made in a federal prison, by convicts, and was not cheap.

In 1983, I passed that tabel on to a relative, who is a civil engineer. He drew a lot of plans on that table.

In 2004, he passed it on to his son. Not a singkle nail or screw ever came loose, and the only damage on it was that the top plabe varnish had literally been worn out from sheer use. Made of solid wood, not particle board. So, it's now 53 years old, and still going strong, with a distinct possibility that my relative's grandson could inherit it in fill working condition.

It is not beautiful, it's an office type work table with drawers on both sides, but it is indeed well made as I doubt anyone does today, or, if someone does, I hate to think what it might cost.

There is the pride of ownership, possible only with well made things, that many kids today haven't ever even heard of, they are conditioned to cheap and short lasting, then buy again.
 
Getting an amplifier to work nicely with a power supply doesn't require extreme measures - though it may help to go completely OTT to see what matters in a situation (hmmm, wonder what abraxalito's doin' at the moment, :D) - once the key factor is isolated then one tries to use smarter and smarter methods to get the same results ... the important thing is to get the interaction which is disrupting the quality of the system under control ...

Sheesh Frank, we know what's disrupting audio qualuity in modern integrated and power amps made by the industry - typically underrated power supplies, not infrequently based on cheap'n'cheerful capacitors.

While this may appear to be a sweeping statement, it's relatively easy to prove. Take a product of your choice belonging to the economy sector of the market, look inside and replace just the two main caps with larger and better quality caps, and you will easily hear the difference.

Of course, that's just the first line of improvement, depedning on how interested you are in the said product you could continue along similar lines further down the road. The differences may not be obvious from the first note, but use patience and preseverance and you could improve an otherwise dull product to a full Hi Fi status.
 
Are you serious about a shunt regulator for a power amp? The shunt needs to be scaled to the peak current to work. For an amp with 30 volts peak voltage and 30 amps peak current the shunt need to be able to dissipate 900W! And the source supplying it has to have reserve as well, probably another few hundred watts worth.

Exactly.

Shunt works just fine for low power level of electronics, such as preamps, tuners, CD players and so forth, in which typically use less than 20W of power.

But for power amps, classic regulation will be more practical and useful.
 
So buying faster brings you a better product. I did not know that.
I waited for my Dutch leather couch for 9 month and i prepaid because i wanted an unusual aubergine color.
My son and children will likely sit in there in 30 years.

So buying slow = better :)


30yrs from now your grandkids may well be sitting in Grandpa's coach wondering what happened to all the furniture builders who never figured out built in obsolescence like the automotive industry ...


just saying ............ :drink:
 
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So buying slow = better :)


30yrs from now your grandkids may well be sitting in Grandpa's coach wondering what happened to all the furniture builders who never figured out built in obsolescence like the automotive industry ...


just saying ............ :drink:

Or, in 30 years' time, Joachim's grandkids might say: Granpa was a true conservationist, he wanted to buy once and not many times, so he bought well and saved on the depleting resources.
 
I just saw this quote and I think it's worth resharing

"Audio as a hobby is dying, largely by its own hand. As far as the real world is concerned, high-end audio lost its credibility during the 1980s, when it flatly refused to submit to the kind of basic honesty controls (double-blind testing, for example) that had legitimized every other serious scientific endeavor since Pascal."

I'd say that this quote is correct, audio reviews almost exclusively avoid blind listening.

I'd say John Curl is correct as well though.
 
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