But you must admit, "Explendid" is a very creative and genius word, engineered by Carlos. 🙂
Mike
Mike
Yeah.... was nice to read, voluptuous from Cocolino may be his future "trade mark"
Voluptuous is wonderfull.
I am watching that boat, it has a lot of people, but i cannot see very well, my eyes cannot see how voluptuous are those people there...ahahahah.
Great!
Carlos
Voluptuous is wonderfull.
I am watching that boat, it has a lot of people, but i cannot see very well, my eyes cannot see how voluptuous are those people there...ahahahah.
Great!
Carlos
Attachments
Sheldon,
I often feel jealous of our memebers that know many languages and can converse in English better than I can.
Even though "Explendid" is a new word it seems to convey the meaning and feeling so much better than "real" english words. Carlos has a talent to do this often and this is part of his magic. If I tried to do this I'd end up with egg on my face.
thanks
I often feel jealous of our memebers that know many languages and can converse in English better than I can.
Even though "Explendid" is a new word it seems to convey the meaning and feeling so much better than "real" english words. Carlos has a talent to do this often and this is part of his magic. If I tried to do this I'd end up with egg on my face.
thanks
I could never realise that "Explendid" do not exist!!!
Ahahahahaha!.....this is very interesting...nobody told me!!!!
When i was young, i remember a movie picture that i apreciated very much....i was very young and gone with my Mum.
The movie was "Love is the most explendorous thing"...but i had doubts when i post the first time..... i was reading and feeling that the sentence had not rithm!.... that explendid could give to the sentence a better rithm to be readable and good to keep in memory.
So...the error was produced more than 48 years ago...as i had 6 years when i watch this movie...and all movies was in English those old days, this way i had to learn some words since i was young...many will be wrong, for sure, but some will be something funny....guaranteed...warranty...i do not know each one is correct...hehe
regards,
Carlos
Ahahahahaha!.....this is very interesting...nobody told me!!!!
When i was young, i remember a movie picture that i apreciated very much....i was very young and gone with my Mum.
The movie was "Love is the most explendorous thing"...but i had doubts when i post the first time..... i was reading and feeling that the sentence had not rithm!.... that explendid could give to the sentence a better rithm to be readable and good to keep in memory.
So...the error was produced more than 48 years ago...as i had 6 years when i watch this movie...and all movies was in English those old days, this way i had to learn some words since i was young...many will be wrong, for sure, but some will be something funny....guaranteed...warranty...i do not know each one is correct...hehe
regards,
Carlos
Hi Carlos,
I remember when I was a kid , the newspapar had a daily cartoon titled something like "Love is a many splendid thing" or was that "Explendid"? Either way, it doesn't matter. 😀
regards
I remember when I was a kid , the newspapar had a daily cartoon titled something like "Love is a many splendid thing" or was that "Explendid"? Either way, it doesn't matter. 😀
regards
Thank you Christer, very kind from you.
Greg....could be the cartoon, as i used to see them often, and they used to write wrong things there....more phonetic, more sound than really the correct words...all those things will going into memory....i am not sure, how that strange word appeared...maybe because my language...Explêndido, Explêndoroso... a Portuguenglish or Englishguese.
Well...maybe this has called your attention, and this was fine!
regards,
Carlos
Greg....could be the cartoon, as i used to see them often, and they used to write wrong things there....more phonetic, more sound than really the correct words...all those things will going into memory....i am not sure, how that strange word appeared...maybe because my language...Explêndido, Explêndoroso... a Portuguenglish or Englishguese.
Well...maybe this has called your attention, and this was fine!
regards,
Carlos
English is an evolving language, and easily adapts to include foreign words, French and Scandinavian words for example. New words are included frequently, for example the latest edition of The Oxford English Dictionary includes the word "chav", of all things.
If enough people used the word "explendid" then it would be included in the next edition.😀
If enough people used the word "explendid" then it would be included in the next edition.😀
Michael, Pavel,
You have both done a fine job on this amp, good engineering, outstanding Bode Nyquist studies to optimise stability, and a highly presentable pcb.
I salute you both for these efforts because I've been there and I know it's all hard work.
But let me respond to the pervasive notion, specifically from you Pavel, that only an engineer can do this, and that only an engineer is smart enough to take proper account of all these complicated phenomena. Having achieved perfect stability with the 5200/1943 Toshiba outputs, having discerned perfect square wave behaviour on the CRO, and having enjoyed some very satisfying few hours in listening tests, there is nonetheless still more work to be done.
You might consider this, Michael, in the weeks and months ahead. I do not denigrate or belittle your joint efforts, the opposite is true. However, I just make a simple point about perception of a job well done.
You must formulate a layout and a component selection, and possibly make some minor adjustments in operating point, which together bring out the best possible subjective sonic performance.
This is the final frontier; to get something which is absolutely at its peak in listening tests head to head with other high end products. To fall short of this goal would be to make the amp like every other 'why me' design; it is, in topology at least, very like the Hitachi application note mosfet amp of the early seventies (which is a corker, BTW). And of course, this doesn't actually require too much engineering knowledge - only a lot of permutations and long hours of careful listening. The market seems to know this intuitively, perhaps because every DIYer wants the absolute best design possible.
I put it to you that this will make the Symasym a truly exceptional amplifier, with strong engagement and beguiling musicality - those qualities which can only be assessed subjectively.
In closing, one final, rather acid point: Club membership in all its forms is built upon groupthink and conformity. This approach delivers corporate profits, stable political structures, and worthy citizens. Yet progress in all endeavours relies upon blind self-confidence, obsessive vision, and the desire to walk alone - non-conformity in a word, and rejection of the club syndrome. Thus, all progress relies on the efforts of unreasonable men; men like Tesla, Einstein, Banting, Brunel, Attaturk, Darwin, Bohr, the list is endless. All of them unreasonable men, who stood well outside their memberships in all they did, and all of whom earned endless criticism even as they entered legend.......
End of rant....... flamesuit on.......
Dave, that's not Viking words, that's NORSE words!!
Cheers,
Hugh
You have both done a fine job on this amp, good engineering, outstanding Bode Nyquist studies to optimise stability, and a highly presentable pcb.
I salute you both for these efforts because I've been there and I know it's all hard work.
But let me respond to the pervasive notion, specifically from you Pavel, that only an engineer can do this, and that only an engineer is smart enough to take proper account of all these complicated phenomena. Having achieved perfect stability with the 5200/1943 Toshiba outputs, having discerned perfect square wave behaviour on the CRO, and having enjoyed some very satisfying few hours in listening tests, there is nonetheless still more work to be done.
You might consider this, Michael, in the weeks and months ahead. I do not denigrate or belittle your joint efforts, the opposite is true. However, I just make a simple point about perception of a job well done.
You must formulate a layout and a component selection, and possibly make some minor adjustments in operating point, which together bring out the best possible subjective sonic performance.
This is the final frontier; to get something which is absolutely at its peak in listening tests head to head with other high end products. To fall short of this goal would be to make the amp like every other 'why me' design; it is, in topology at least, very like the Hitachi application note mosfet amp of the early seventies (which is a corker, BTW). And of course, this doesn't actually require too much engineering knowledge - only a lot of permutations and long hours of careful listening. The market seems to know this intuitively, perhaps because every DIYer wants the absolute best design possible.
I put it to you that this will make the Symasym a truly exceptional amplifier, with strong engagement and beguiling musicality - those qualities which can only be assessed subjectively.
In closing, one final, rather acid point: Club membership in all its forms is built upon groupthink and conformity. This approach delivers corporate profits, stable political structures, and worthy citizens. Yet progress in all endeavours relies upon blind self-confidence, obsessive vision, and the desire to walk alone - non-conformity in a word, and rejection of the club syndrome. Thus, all progress relies on the efforts of unreasonable men; men like Tesla, Einstein, Banting, Brunel, Attaturk, Darwin, Bohr, the list is endless. All of them unreasonable men, who stood well outside their memberships in all they did, and all of whom earned endless criticism even as they entered legend.......
End of rant....... flamesuit on.......
Dave, that's not Viking words, that's NORSE words!!
Cheers,
Hugh
Hugh,
I think you are quite right. The Symasym has all the potential to be a nice competition to the AKSA 55.
Regards,
Pavel
I think you are quite right. The Symasym has all the potential to be a nice competition to the AKSA 55.
Regards,
Pavel
So...put them side by side...as i done
And tell me what you will perceive... well, not exactly you, but some test group of listeners...blind testing...no one will know what is playing...if Aksa or Symassym....switching fast...Blind testing without any previous informations to the evaluation group.
Acoustic levels at the same.....two reference speakers and one reference headphone beeing tested in three separate sheets of paper.... three evaluations made of each one of the invited guys.
They must have 3 group of ages, cannot be only your friends, may be some strange people, non audiophile group, switching fast from amplifier to other amplifier....giving not time enought to brain make adjustments.
Having different types of musics...many types, and also thunder, foot steps in the rain.....foot steps over the sand.... watter flowing...rain on ceiling. claps....piano music....bells....cymbars....glass bottles with watter producing sound....drums...explosions...violin, guitar scratching fingers over the strings.... wind noise....three persons talking lower volume at same time, to understand and copy each one phrase, repeating this segment three times only.
Dark environment...no ligth....black dark and acoustic place... with carpets around...speaker at ear level.... 1 meter distance from wall...acoustic suspension speaker system...having 16000 hertz reproduction and strong 25 hertz reproduction...capacity to shake room with 15 hertz too!
Feed the guys with food and water and have sure they are confortable when listening.
Ask them if they are facing emotional problems in their life...and exclude the ones with emotional problems.
All them must have visited doctor, and they will enter the testing with their audiograms....the audition graphic!
Do not let them communicate with others that are waiting to enter the testing room.
And repeat the test once more.
And tell me......i suggest you GEM, AKSA and SYMASSYM, and other that you considered the world best amplifier.
And tell me....or even tell forum people.
Of couse i know the result...but will not tell....as they are all wonderfull, but there is the wide world biggest Champion!....maybe something different from my knowledge
I will not tell...as difference is hard to perceive....but they are there to be perceived, and the blind test will show.
Why not to tell?
Those guys, Hugh Dean, Michael Bittner and Graham Maynard....they are all my friends, and i do not want to put them to compete, as i do not want that someone of them have advantages over the others, and my mouth will not contribute with that.
If you find, many not too close friends asked me the one is better....i told one brand each time, so....all them Champions, not to tell my own and confidential conclusion...not even Hugh, Michael or Graham, knows exactly what i think....my secret guys!
There are two persons that received the published Hugh schematic and one of the five secret, selected, adjusted parts...no one knows the correct circuit...only the AKSA owners, and those will not tell secrets...no one that may had informs from me, received them complete.... the only chance if to visit some Aksa owner to have a look at the board...and believe that discovered all things....but there are more hidden things...hehe.
Well...someone can borrow an Aksa in a sealed closed box, as the circuit is top secret, and preserved by the ones that paid for it, and had the obligation to protect, as hugh was clear not to sale to non presented people...need to have someone known by Hugh and the customer, to guarantee the secret.... the guy must be presented to Hugh...he do not need, anymore, to make concessions.... his sales are much bigger than he need those days.
I am sorry...will have to work hard, as i done, to discover that.
regards,
Carlos
And tell me what you will perceive... well, not exactly you, but some test group of listeners...blind testing...no one will know what is playing...if Aksa or Symassym....switching fast...Blind testing without any previous informations to the evaluation group.
Acoustic levels at the same.....two reference speakers and one reference headphone beeing tested in three separate sheets of paper.... three evaluations made of each one of the invited guys.
They must have 3 group of ages, cannot be only your friends, may be some strange people, non audiophile group, switching fast from amplifier to other amplifier....giving not time enought to brain make adjustments.
Having different types of musics...many types, and also thunder, foot steps in the rain.....foot steps over the sand.... watter flowing...rain on ceiling. claps....piano music....bells....cymbars....glass bottles with watter producing sound....drums...explosions...violin, guitar scratching fingers over the strings.... wind noise....three persons talking lower volume at same time, to understand and copy each one phrase, repeating this segment three times only.
Dark environment...no ligth....black dark and acoustic place... with carpets around...speaker at ear level.... 1 meter distance from wall...acoustic suspension speaker system...having 16000 hertz reproduction and strong 25 hertz reproduction...capacity to shake room with 15 hertz too!
Feed the guys with food and water and have sure they are confortable when listening.
Ask them if they are facing emotional problems in their life...and exclude the ones with emotional problems.
All them must have visited doctor, and they will enter the testing with their audiograms....the audition graphic!
Do not let them communicate with others that are waiting to enter the testing room.
And repeat the test once more.
And tell me......i suggest you GEM, AKSA and SYMASSYM, and other that you considered the world best amplifier.
And tell me....or even tell forum people.
Of couse i know the result...but will not tell....as they are all wonderfull, but there is the wide world biggest Champion!....maybe something different from my knowledge
I will not tell...as difference is hard to perceive....but they are there to be perceived, and the blind test will show.
Why not to tell?
Those guys, Hugh Dean, Michael Bittner and Graham Maynard....they are all my friends, and i do not want to put them to compete, as i do not want that someone of them have advantages over the others, and my mouth will not contribute with that.
If you find, many not too close friends asked me the one is better....i told one brand each time, so....all them Champions, not to tell my own and confidential conclusion...not even Hugh, Michael or Graham, knows exactly what i think....my secret guys!
There are two persons that received the published Hugh schematic and one of the five secret, selected, adjusted parts...no one knows the correct circuit...only the AKSA owners, and those will not tell secrets...no one that may had informs from me, received them complete.... the only chance if to visit some Aksa owner to have a look at the board...and believe that discovered all things....but there are more hidden things...hehe.
Well...someone can borrow an Aksa in a sealed closed box, as the circuit is top secret, and preserved by the ones that paid for it, and had the obligation to protect, as hugh was clear not to sale to non presented people...need to have someone known by Hugh and the customer, to guarantee the secret.... the guy must be presented to Hugh...he do not need, anymore, to make concessions.... his sales are much bigger than he need those days.
I am sorry...will have to work hard, as i done, to discover that.
regards,
Carlos
Carlos,
you are right, there is one extraordinary difference. Though Michael's symasym is full open design /and can possibly accept a kind of improvement from public/, Hugh's actual AKSA 55 is covered by mystery. From that point of view, I see Hugh's post here to be unfair.
Hugh - send me your AKSA in stereo and I will do independent comparison. But don't offer me to buy it, that's not the game now.
Pavel
you are right, there is one extraordinary difference. Though Michael's symasym is full open design /and can possibly accept a kind of improvement from public/, Hugh's actual AKSA 55 is covered by mystery. From that point of view, I see Hugh's post here to be unfair.
Hugh - send me your AKSA in stereo and I will do independent comparison. But don't offer me to buy it, that's not the game now.
Pavel
Independently tested, and group tested was already done.
And evaluations are returning from thousands of units sold. No complain!
The chance to have an interesting experience, related to numbers, measurements versus audible quality will be lost by some guys, as i think that Hugh will have any motivation to send free samples.... well, we gonna listen him...but i already know him related discounts and free samples.
Even to discover "who is the ultimate forum amplifier?" will be not enougth reason to motivate him, as he already know his product quality.
Well, i imagine, but i may be wrong, that we will have no chance to that comparison be made, as Hugh do not need evaluation with numbers, as already done many times, including outside of his factory, by some professional evaluation company that made all measurements possible to him, to check his own numbers... and more than that, his quality is more connected to listenable quality, than connected to numbers.
What can i say...let's say that he may lost in some numbers, but will produce wonderfull results when listening.
Hugh may be a little curious to see if someone can win his amplifier in A to B comparison...as i made those tests, and did not inform him and not informed the others too....they have listened what they want to listen, as i do not apreciate discussions based in beliefs or even based in numbers.
I believe in A to B comparison testings, and this is something that many forum guys use to do and know very well.
This produces group results, related subjective apreciation of humans...something that has more value to sale some idea to construct, or to sale some equipment to market.... result that can push people to construct or even to buy or sell things...because result of human hearing... the ones have money to buy, capacity to sell and interest, motivation...things we do not have in instruments, and they do not use to buy, sell or be motivated.... i could never watch and Scope together some Spectrum Analiser going to Shopping.... in audioholic shops or something alike.hehe
That kind of testing, using controled groups, around 30 persons, producing hard work (I have done, as i have some intentions to produce some clone to sell in my country, with agreement of the designer, of course)...this may have "LEF error", as some Statistical result, having standard maximum variations and precision.... beeing calculated by a professional that produces those researches, and can provide numbers that can be Internationally compared.
I know the ultimate forum amplifier, as i have tested almost all BGTs amplifiers, and those last ones were compared under controled conditions.
I checked many others too....Leach, this one variations, Rod Elliot products and some of the forum results...some cooperative amplifier already made one and half year ago.
Related open schematic or not open schematic, you may be rigth, or may be wrong, as copper foil, depending the size, the area, having double face, or continuous parallell lines, very close one each other, may produce the small capacitance you used in your symassym upgrade.... 6 or 8 picofarads or something alike... and those other capacitances, represented by board, are not shown, and they exist in every board design...also inductances exist and all those things influenced.... small capacitances are common to be used in feedback line...and those small capacitances can be produced by board by itself...those are hidden, as no one measure them, and have the same result as some parts, including capacitors, that Aksa has in it's circuit.
Well..i already know.... and i think result is fair and precise, i will not loose a chance to check my numbers too...as i do not have them... they tell me not too much...as the most common is that we publish what factories use to publish, and many times they avoid the frequency with the maximum distortion....and it is easy to reduce distortions not measuring high frequencies for instance...so.... as i use to say, i prefer listening tests, as reviews use to make and publish to us, and those magazines survive because humans are buying them, because Scopes do not buy magazines....and those, listening tests, i have done.
If you observe LM3875 chip amplifier specifications, numbers, and we start to believe in those numbers without listen....we will junk all we have, because the numbers there are very special...but go to listen to it!
Symassym, Aksa or Gem
Aksa Gem and symassym
Gem,symassym and Aksa
In every order or letter size we can write, are all guaranteed!
As beeing good, reliable, with wonderfull sonics, and slighly different one related other...but the real better one exist!
regards,
Carlos
And evaluations are returning from thousands of units sold. No complain!
The chance to have an interesting experience, related to numbers, measurements versus audible quality will be lost by some guys, as i think that Hugh will have any motivation to send free samples.... well, we gonna listen him...but i already know him related discounts and free samples.
Even to discover "who is the ultimate forum amplifier?" will be not enougth reason to motivate him, as he already know his product quality.
Well, i imagine, but i may be wrong, that we will have no chance to that comparison be made, as Hugh do not need evaluation with numbers, as already done many times, including outside of his factory, by some professional evaluation company that made all measurements possible to him, to check his own numbers... and more than that, his quality is more connected to listenable quality, than connected to numbers.
What can i say...let's say that he may lost in some numbers, but will produce wonderfull results when listening.
Hugh may be a little curious to see if someone can win his amplifier in A to B comparison...as i made those tests, and did not inform him and not informed the others too....they have listened what they want to listen, as i do not apreciate discussions based in beliefs or even based in numbers.
I believe in A to B comparison testings, and this is something that many forum guys use to do and know very well.
This produces group results, related subjective apreciation of humans...something that has more value to sale some idea to construct, or to sale some equipment to market.... result that can push people to construct or even to buy or sell things...because result of human hearing... the ones have money to buy, capacity to sell and interest, motivation...things we do not have in instruments, and they do not use to buy, sell or be motivated.... i could never watch and Scope together some Spectrum Analiser going to Shopping.... in audioholic shops or something alike.hehe
That kind of testing, using controled groups, around 30 persons, producing hard work (I have done, as i have some intentions to produce some clone to sell in my country, with agreement of the designer, of course)...this may have "LEF error", as some Statistical result, having standard maximum variations and precision.... beeing calculated by a professional that produces those researches, and can provide numbers that can be Internationally compared.
I know the ultimate forum amplifier, as i have tested almost all BGTs amplifiers, and those last ones were compared under controled conditions.
I checked many others too....Leach, this one variations, Rod Elliot products and some of the forum results...some cooperative amplifier already made one and half year ago.
Related open schematic or not open schematic, you may be rigth, or may be wrong, as copper foil, depending the size, the area, having double face, or continuous parallell lines, very close one each other, may produce the small capacitance you used in your symassym upgrade.... 6 or 8 picofarads or something alike... and those other capacitances, represented by board, are not shown, and they exist in every board design...also inductances exist and all those things influenced.... small capacitances are common to be used in feedback line...and those small capacitances can be produced by board by itself...those are hidden, as no one measure them, and have the same result as some parts, including capacitors, that Aksa has in it's circuit.
Well..i already know.... and i think result is fair and precise, i will not loose a chance to check my numbers too...as i do not have them... they tell me not too much...as the most common is that we publish what factories use to publish, and many times they avoid the frequency with the maximum distortion....and it is easy to reduce distortions not measuring high frequencies for instance...so.... as i use to say, i prefer listening tests, as reviews use to make and publish to us, and those magazines survive because humans are buying them, because Scopes do not buy magazines....and those, listening tests, i have done.
If you observe LM3875 chip amplifier specifications, numbers, and we start to believe in those numbers without listen....we will junk all we have, because the numbers there are very special...but go to listen to it!
Symassym, Aksa or Gem
Aksa Gem and symassym
Gem,symassym and Aksa
In every order or letter size we can write, are all guaranteed!
As beeing good, reliable, with wonderfull sonics, and slighly different one related other...but the real better one exist!
regards,
Carlos
Carlos,
frankly speaking, I am not very interested in doing such a comparison test. I was only a little bit surprised by Hugh's post, especially for the reason that it comes from competition camp.
Regards,
Pavel
frankly speaking, I am not very interested in doing such a comparison test. I was only a little bit surprised by Hugh's post, especially for the reason that it comes from competition camp.
Regards,
Pavel
Why, there is no hint of competition or contest in Hugh's post. He has only stated that he has tread that path earlier, that of voicing an amp to its ultimate subjective performance. It is only being assumed by the readership that he is referring to the AKSA; perhaps, he is or perhaps, he is not. Hugh's Glass Harmony is certainly better than the AKSA in his own estimation.
I think he is only encouraging those involved in the developmental process to egg on to achieving the best that an audio amp is intended for, albeit in a challenging fashion.
I invited Graham to do the same thing with the AKSA and I have received a flat NO.
Over to Mike and Pavel.
What I get from Hugh's post, I can parapharase so: "You have put together an amplifier that sounds very good and is technically sound. You have the basis maybe for a top-notch performer. But to get there you will have to do the final tuning by ear, involving small changes in component value, type, and placement. And the subtle but perceptible differences wrought by this process cannot be predicted based on calculation with simplified models."
Seems plausible to me. But I'm going to focus on getting my speakers sorted out first. They are the limiting issue for me now. After that, I may cycle back and see what crude tuning I'm capable of with the amps, and of course following to see what the sharp folks here come up with.
Sheldon
Seems plausible to me. But I'm going to focus on getting my speakers sorted out first. They are the limiting issue for me now. After that, I may cycle back and see what crude tuning I'm capable of with the amps, and of course following to see what the sharp folks here come up with.
Sheldon
Well, I hope it's ok to post my beginner problems here. I am having problems with the production of my boards.
Circuit is printed with inkjet printer on normal paper, two times for darker black, good accuracy. Wettened with sunflower oil. Please don't laugh. I made a test sample, 9 strips, 2 minutes each 33 cm below two flourescent lamps ("energy saving lamps", I used them because I saw a spectral graph of them having a peak at ~ 410nm wavelength), they have only 12 W each. Please dont laugh. The glass plate seems relatively dark, unfortunately. I developed with NaOH, and nothing happened, except that on the non-copper side of this no-name boards, some kind of laquer did come off (??). Now I'm giving them half an hour of light in addition, problem is, they were in the NaOH 4 minutes already.
The photo shows my test setup. Again, please don't laugh. I'm sure someone has gone through this before. Ok now go have a good laugh then this post was of some use
Circuit is printed with inkjet printer on normal paper, two times for darker black, good accuracy. Wettened with sunflower oil. Please don't laugh. I made a test sample, 9 strips, 2 minutes each 33 cm below two flourescent lamps ("energy saving lamps", I used them because I saw a spectral graph of them having a peak at ~ 410nm wavelength), they have only 12 W each. Please dont laugh. The glass plate seems relatively dark, unfortunately. I developed with NaOH, and nothing happened, except that on the non-copper side of this no-name boards, some kind of laquer did come off (??). Now I'm giving them half an hour of light in addition, problem is, they were in the NaOH 4 minutes already.
The photo shows my test setup. Again, please don't laugh. I'm sure someone has gone through this before. Ok now go have a good laugh then this post was of some use
Attachments
Sheldon said:
But he would have no right to speak about "technical sound", if he did not build the amp, and the exactly same amp (difference counts).
During several last years I have had a chance to listen to a wide range of renown amplifiers, and based on this experience I wrote my review. Symasym is not "technically sounding" at all, and it is not "the amp like every other 'why me' design", to repeat Hugh's words.
Pavel
Now, when the job is done, many recommendations from people who have not build and have not heard will arise, armchair evaluators distant 10.000 km from the amp and from reality.