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Shanti Dual LPS 5V/3A , 5V/1.5A
Shanti Dual LPS 5V/3A , 5V/1.5A
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Old 11th December 2019, 08:44 AM   #1051
stretchneck is offline stretchneck  United Kingdom
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Join Date: Mar 2018
Location: Oxford
Nirvana and Shanti power supplies...

Nirvana is apprears to be a single 5V output, so I assume that they're the same in terms of sound quality/topology. Just that the Shanti is dual rail offering a good solution for those of us that need to power both the USB Signature and a DAC. Therefore Nirvana power supply is for someone who doesn't yet have a Shanti, or will only own a Revolution DAC?

Last edited by stretchneck; 11th December 2019 at 08:52 AM.
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Old 11th December 2019, 10:33 AM   #1052
cdsgames is offline cdsgames  Canada
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Nirvana is a SMPS with very low noise (almost as good as Shanti) but no supercaps on output.


Its a cheaper solution that can give great results .


Still I consider Shanti to be a better (slightly) solution .
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Old 11th December 2019, 10:59 AM   #1053
stretchneck is offline stretchneck  United Kingdom
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Quote:
Originally Posted by cdsgames View Post
Nirvana is a SMPS with very low noise (almost as good as Shanti) but no supercaps on output.


Its a cheaper solution that can give great results .


Still I consider Shanti to be a better (slightly) solution .
Excellent - thanks
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Old 11th December 2019, 11:09 AM   #1054
cdsgames is offline cdsgames  Canada
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A very interesting read ...especially with Revolution coming up with a unique feature...the ability to listen not only to perfect (-121 to -124 THD) = inaudible distortion ...


But also we will give the ability to tweak H2 and H3 independent (ie to increase distortion on those harmonics for euphonic gain)


Please read : Katz's Corner Episode 25: Adventures in Distortion | InnerFidelity

Last edited by cdsgames; 11th December 2019 at 11:34 AM.
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Old 11th December 2019, 11:43 AM   #1055
cdsgames is offline cdsgames  Canada
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A few highlighted quotes from above article :



""Adding a certain amount of second harmonic can improve the purity of tone and depth of amplifiers without losing any detail, impact or transient response. ""


""
A Look Toward The Future
I believe that second harmonic distortion is sonic gold for audiophiles: It's very seductive, especially if you want a warm sound quality, three-dimensionality, and beautiful reproduction of ambience and depth. Based on the listening tests, there does not seem to be a sonic negative side if the proportions are done right""


""
So I hope some designers will embrace this approach: A smart designer might produce an outboard box with variable second harmonic level like my Blender.""


We did. Revolution has now official support for H2 and H3 increase .
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Old 11th December 2019, 02:23 PM   #1056
jonjon77 is offline jonjon77
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A little feed back on the association digione signature, usbridge signature and shanti. I used for more than a year the digione signature fed by the allo stock supply on the "dirty side" and battery lifepo on the "clean side", the connection is made by BNC. The tests were done with the usbridge and shanti out of the box so no burned in. I started by plugging an output of the shanti on the clean side of the digione instead of the battery, I perceived a difference in sound signature, a feeling that there is more sweetness with the shanti but I would not tell which solution is better because the shanti is not burned in and I did not push the tests very far. In any case, the power on the clean side of the digione has a great influence on the sound, I have already compared the battery solution with my Teradak 400w, again you can easily listing the difference, I perceived more dynamic with the Teradak. I will return to comparisons between the shanti and the battery solution when the shanti will have passed the 200 hours of break-in. I then replaced the allo stock supply of the digione on the dirty side by the other power cable of the shanti (3A) and there, the improvement was impressive, I win at all registers, this shows that it is also beneficial to treat the dirty side. Comes the moment when I unassociated the digione of the raspeberry PI3 + to associate it with the usbridge signature, I could not do tests before / after given that I did not see me disassemble and reassemble the digione but from the first listenings I realized that it was not necessary. Going to the Shanti has taken my system up a level of sq and the transition to the signature usbridge with the signature digione on it has brought up an extra level in sq. At the top or the bottom of the register, it's better than before, I gained clarity, spatialisation and micro-details. I did a listen after 50 hours of break-in, I felt improvement again. When I listen to songs that I'm used to listening to for my comparative tests, I tell myself that it has never been so pleasant to listen to until now. On the site Allo, we can have the set for 770 dollars plus a nice discount for black Friday. At this price, I doubt we can find a better solution.
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Old 11th December 2019, 02:29 PM   #1057
Markw4 is online now Markw4  United States
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Quote:
Originally Posted by cdsgames View Post
...inaudible distortion ...
Some may differ regarding at what point distortion becomes inaudible... just sayin'
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Old 11th December 2019, 05:57 PM   #1058
cdsgames is offline cdsgames  Canada
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Thx you jonjon77 , I agree with your assessment .


Mark at -121 to -124 db distortion is consider inaudible by majority of articles I have read


PLease also note that we are at the floor of our AP machine , I expect an improvement of 1 to 2 db on a better AP machine .


In the end its not significant , but I think that most people will enjoy the euphonics aspect of Rev much more than perfect THD . We had the same experience with Katana THD vs SQ. Main difference was H2 and H3 :-)



I also think that most people dont realize how "great sound with 3D stage" has some strong H2 harmonics associated to it.



In any case , I am playing at the moment with H2 and I am amazed how it changes the sound (at rather lowish levels)


I believe that some H3 harmonic component might be further beneficial (less than H2 levels)


New Revolution PCB is under testing .


ps. I think that we got rather better results than datasheet of es9038 (thd+h at -120) , our THD is -124.5 on one channel . We are employing a new trick on MCLK :-)

Last edited by cdsgames; 11th December 2019 at 06:00 PM.
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Old 12th December 2019, 01:25 PM   #1059
cdsgames is offline cdsgames  Canada
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A second article on what is H2 and what it can do for sound quality



Pass H2 Harmonic Generator - Positive Feedback
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Old 12th December 2019, 02:25 PM   #1060
Markw4 is online now Markw4  United States
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Seems to me I was able to show that one can hear very low level distortion down around -120dB or so by adding small amounts of 2nd or 3rd harmonic just as Revolution is able to do. Have you done a careful test to see the smallest amount of harmonic distortion you can hear?

I should add, there is something specific to listen for: if you take a CD rip like 'Black Cow' by Steely Dan which is very well recorded, it is easy to hear small amounts of IMD added by 2nd or 3rd order HD when group vocals are sung. The vocals will be more garbled together rather than individually distinct. This assumes, of course, the dac is otherwise very accurate and so are the power amplifier and speakers (or headphone setup). The amp and speakers/headphones should be very low distortion and very low noise to make hearing small IMD easier. (Also, I prefer to listen at low volume levels when doing such tests, as I found loud sound desensitizes hearing for me. Others may want to try to find what works best for them.)

Last edited by Markw4; 12th December 2019 at 02:28 PM.
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