hi,
I remember there was a roadtest of the AKSA amp, around the USA, over on the audiocircle forum, this is where Hugh has his own support forum.
The roadtest appeared to be quite succesful and enlightening for many, unfortunatley I live in the UK so I could not participate.
From what I understand the target audience for these amplifiers is not really guys that build their own amps from the ground up (including circuit design), but rather people who are looking for good bang for buck (though there are some well known owners who can design). It's a ready amplifier kitset, with good community support, that's very appealing for many. Ultimate performance is not always the goal of these people, just to have something that sounds a lot better than comparitive or much higher priced equipment, is more than enough to satisfy their needs.
I think over on diyaudio.com we have a slightly more engineering based population (and also some laymen too (myself!)).
The guys over here are able to break everything down to component value, possible improvements etc. Question is are they likely to be purchasers of such kitsets themselves???
I think the Aksa horse, has been flogged quite a few times over the last year or so, and an almost complete schematic of the amp was also made available here.
Though not meant as a dig, I don't see Nelson coming under so much fire for certain design choices.
That's the danger for people who do have commercial ineterests posting and being known here, you always have to work double hard to be accepted. And because the cost of components is known, we tend to fry anyone with an 'unjustifiable' profit margin. Though if one looks closer those prices seem very justifiable.
Though in my mind, I see that there is a demand for the kitset, so something must be right.
Perhaps, if Hugh is willing, it would be worth arranging an Aksa amp tour of the USA/UK via diyaudio.com, so that those of us who really are wondering what the amp sounds like, can for ourselves evaluate reasons for design and component choices. The audience would of course be a little different to the ones who really are looking to purchase.
I would love to see a Uk tour of this amp, so that we could spend a week with the amp in our system and decide how we like it.
I don't know if such a thing would interest Hugh though as it may be a waste of time amongst many other things that are important , and I do hope I'm not overstepping the mark by making such a suggestion.
Thanks
Raja
I remember there was a roadtest of the AKSA amp, around the USA, over on the audiocircle forum, this is where Hugh has his own support forum.
The roadtest appeared to be quite succesful and enlightening for many, unfortunatley I live in the UK so I could not participate.
From what I understand the target audience for these amplifiers is not really guys that build their own amps from the ground up (including circuit design), but rather people who are looking for good bang for buck (though there are some well known owners who can design). It's a ready amplifier kitset, with good community support, that's very appealing for many. Ultimate performance is not always the goal of these people, just to have something that sounds a lot better than comparitive or much higher priced equipment, is more than enough to satisfy their needs.
I think over on diyaudio.com we have a slightly more engineering based population (and also some laymen too (myself!)).
The guys over here are able to break everything down to component value, possible improvements etc. Question is are they likely to be purchasers of such kitsets themselves???
I think the Aksa horse, has been flogged quite a few times over the last year or so, and an almost complete schematic of the amp was also made available here.
Though not meant as a dig, I don't see Nelson coming under so much fire for certain design choices.
That's the danger for people who do have commercial ineterests posting and being known here, you always have to work double hard to be accepted. And because the cost of components is known, we tend to fry anyone with an 'unjustifiable' profit margin. Though if one looks closer those prices seem very justifiable.
Though in my mind, I see that there is a demand for the kitset, so something must be right.
Perhaps, if Hugh is willing, it would be worth arranging an Aksa amp tour of the USA/UK via diyaudio.com, so that those of us who really are wondering what the amp sounds like, can for ourselves evaluate reasons for design and component choices. The audience would of course be a little different to the ones who really are looking to purchase.
I would love to see a Uk tour of this amp, so that we could spend a week with the amp in our system and decide how we like it.
I don't know if such a thing would interest Hugh though as it may be a waste of time amongst many other things that are important , and I do hope I'm not overstepping the mark by making such a suggestion.
Thanks
Raja
UK AKSA Tour
The tour is an interesting idea and may assist many. To facillitate such a tour there would need to be a group wanting to listen and a tour path organised etc. Then the cost of shipping the unit both ways from Melbourne!
Here is an idea. Why doesn't such a group share costs to buy a kit and then they can also review the building and support experiences.
If enough players, the cost risk would be small. Surely at least one of the listeners would want to buy the completed amp and would have free assembly. This could re-emburse the group.
Note: the unit would also need to be well run-in before sending off on the tour. So the builder gets extra time with it.
cheers
The tour is an interesting idea and may assist many. To facillitate such a tour there would need to be a group wanting to listen and a tour path organised etc. Then the cost of shipping the unit both ways from Melbourne!
Here is an idea. Why doesn't such a group share costs to buy a kit and then they can also review the building and support experiences.
If enough players, the cost risk would be small. Surely at least one of the listeners would want to buy the completed amp and would have free assembly. This could re-emburse the group.
Note: the unit would also need to be well run-in before sending off on the tour. So the builder gets extra time with it.
cheers
HI Christer,
Nice to see you here!
With identical degeneration resistors, current is exactly mirrored left and right. No disagreement there.
However, with 50-100uA being drained off to supply bias to the VAS, more current is then drained from the input transistor's collector, which unbalances the diff pair.
It is often forgotten in the adrenal rush of design elegance that it is the LTP which must have equal currents, NOT the current mirror. Thus, in a case where the stage current is 1mA (or 1000uA) around 460uA is certainly passed on each side of the current mirror, but fully 80uA is diverted into the VAS, meaning 540uA is flowing from the input transistor, and 460uA from the feedback transistor. This sort of imbalance is very considerable, some +/-8%, a horrific figure if you consult the curves and leading to a lot of unneeded distortion.
A properly set up LTP with only resistive loading and no current mirror routinely returns +/-2% accuracy, a major improvement.
Of course this does not happen if the VAS is a FET, and this very likely dominates the sonics of this choice.
Hi Raj, good to see you back!
Thank you for your good suggestion. At present, the US accounts for around 35% of my sales, and continental Europe - focussing on Netherlands, Sweden, Denmark, Italy and Holland with small sales to France, Greece, and Serbia/Montenegro/Croatia, comprising in total around 45%. Around 10% are Australian sales, but less than 10% go to the UK, indicating very strong marketing presence from local manufacturers and resellers. Cost of shipping to the UK is very high, and Customs on a complete amp would be around 20%. On these figures I cannot justify an AKSA tour of the UK; and because of relatively inexpensive courier charges in the US at present, together with the generally favourable AKSA reputation there, future tours would be best focussed again on the US. I presently have a permanent 'audition' AKSA 100N+ in the States, in New York, courtesy of my friend Pmkap.
I think the best thing to do would be to respectfully ask Dave Stocks in Leeds if he would be willing to give you a listen to his 100W N+ (and 55W) AKSAs. You there, Dave? Would you be willing to do this for Raj? I can vouch for Raj, he has a consuming interest in hifi and loves David White's products - which I know to be very good as I've seen them and studied his philosophy. Then perhaps Raj might be in a position to consider building his own!
Not very satisfactory, Raj, but I have to be very careful with costs and marshall my resources where they return most sales. I'm very sorry, but the audition option is a good one and I'd like to ask Dave about it with your permission.
Cheers,
Hugh
Nice to see you here!
With identical degeneration resistors, current is exactly mirrored left and right. No disagreement there.
However, with 50-100uA being drained off to supply bias to the VAS, more current is then drained from the input transistor's collector, which unbalances the diff pair.
It is often forgotten in the adrenal rush of design elegance that it is the LTP which must have equal currents, NOT the current mirror. Thus, in a case where the stage current is 1mA (or 1000uA) around 460uA is certainly passed on each side of the current mirror, but fully 80uA is diverted into the VAS, meaning 540uA is flowing from the input transistor, and 460uA from the feedback transistor. This sort of imbalance is very considerable, some +/-8%, a horrific figure if you consult the curves and leading to a lot of unneeded distortion.
A properly set up LTP with only resistive loading and no current mirror routinely returns +/-2% accuracy, a major improvement.
Of course this does not happen if the VAS is a FET, and this very likely dominates the sonics of this choice.
Hi Raj, good to see you back!
Thank you for your good suggestion. At present, the US accounts for around 35% of my sales, and continental Europe - focussing on Netherlands, Sweden, Denmark, Italy and Holland with small sales to France, Greece, and Serbia/Montenegro/Croatia, comprising in total around 45%. Around 10% are Australian sales, but less than 10% go to the UK, indicating very strong marketing presence from local manufacturers and resellers. Cost of shipping to the UK is very high, and Customs on a complete amp would be around 20%. On these figures I cannot justify an AKSA tour of the UK; and because of relatively inexpensive courier charges in the US at present, together with the generally favourable AKSA reputation there, future tours would be best focussed again on the US. I presently have a permanent 'audition' AKSA 100N+ in the States, in New York, courtesy of my friend Pmkap.
I think the best thing to do would be to respectfully ask Dave Stocks in Leeds if he would be willing to give you a listen to his 100W N+ (and 55W) AKSAs. You there, Dave? Would you be willing to do this for Raj? I can vouch for Raj, he has a consuming interest in hifi and loves David White's products - which I know to be very good as I've seen them and studied his philosophy. Then perhaps Raj might be in a position to consider building his own!
Not very satisfactory, Raj, but I have to be very careful with costs and marshall my resources where they return most sales. I'm very sorry, but the audition option is a good one and I'd like to ask Dave about it with your permission.
Cheers,
Hugh
Hi Ultima Thule (is that Shetlands, Iceland, or Trondheim?),
Thanks for your email.
Sadly I do not have the details you seek, just the figures; the spread was never graphed as the test was done in Newport Beach CA by a third party.
I apologise; my resources are limited when it comes both to finer measurements and mathematical analysis!!
Cheers,
Hugh
Thanks for your email.
Sadly I do not have the details you seek, just the figures; the spread was never graphed as the test was done in Newport Beach CA by a third party.
I apologise; my resources are limited when it comes both to finer measurements and mathematical analysis!!
Cheers,
Hugh
I feel AKSA much more than a single board and an amplifier.
I feel it as many amplifiers, not a single one.
First because Hugh made many versions, this way he has always some versions untouched, even if some design could be victim of piracy.
It is interesting that no one conclude that AKSA is not a single unit.
Hugh make a extremelly kind follow up when you buy AKSA.... first he use to take care about his secrets, and he make you also responsable to keep the secrets, as he passed them to you, as an owner of his product, and you perceive clearly that the public dominium of his research results can be annoying to his business...so.... decent guys try to protect, the result of decent labor and efforts, that produces a delicious sound equipment, that turn us happy when we switch it on....and the thump is very small, something not annoying.
Hugh ask you clearly what you felt listening AKSA...and listening to your comments, he fast suggest the way to customise AKSA for your own needs...so, i am boomy...i love deep bass from old Organs...those from Churches...playing Dracula!...Giant Pipe Organs....and i felt some loss of deep bass.....he told me...change this and that....and i also include a limiter, as the amplifier cannot distort anyway...i is limited in the maximum undistorted level and the input is controled. ( old fashioned zener triggered AGC by DX)
So, not only nice when standard, but also flexible to your personal tastes..... the follow up produces the satisfaction to talk directly with the designer, and the answers needed to customize AKSA to your own musical taste.
There's a version that reproduces Saxophone with that natural harshing characteristic that the instrument produces.... there are people that do not like that natural sound...and Hugh knows how to change it if needed by some customer...also the breath you can perceive in some flute, this can be attenuated too.
But there are people that do not want to know those things....there are guys that want the secret for free, to copy, to reproduce, as already happened in one country but the long arm of the law reached the guy....also he lost credit in his own country.
In my country, if someone start to produce Hugh design, without his permission...i will take care of the problem personally, as more than AKSA owner, he is a decent and honest man that produced amplifiers that are making me very happy those last years...and more than that....he is a friend....those friends that knows your son by his name, and that ask you how your son is going related some school problem.
This is positive...friendship, love, respect....i do not think that many guys that has a special pleasure to "create doubts about Aspen Amplifiers qualities", if those guys are moved by so positive feelings, as those, moves Hugh.
There are those "cloudy" and bad mood guys....easy to detect, we all know them.
Always searching for some detail to send less credit...people that never met Hugh, that never listen AKSA, and that hates Hugh....and they do not even know their reasons.....i think the envy is the feeling that move them.
Too feed those guy's envy.... to make them fat of envy..i will tell you some.
Mr. Hugh Dean is an Military Officer, retired and receiving a good money to keep his life going, also his father has enough money, also his wife is a Military Officer retired.... the daugther have their own work, his business is going very well...and if he decide to stop produce Aksa...he will be listening his products,confortable since his last days...without any worries, as he has plenty conditions to have a confortable and peacefull life...... oh envy...oh pain!....carefull you that is feeling envy..... making too much strengh may broke some teeth...relax man!
He simply is beeing happy producing AKSA and developing more products... the money entering is re-applied in his business and in his car's collection....also Bikes collection.
There are moments that he travel 200 miles to visit a customer, even knowing that profit will be "eated" by the fuel..... he do not bother,...he feel happy when he perceive that the customer turns happy and make sweet comments about the sonics.
Those guys..... that have some passion related their products, as Graham Maynard, respectable man, Michael Bittner,other impressive designer and Hugh Dean, feel good to have their amplifiers playing in many homes....they feel that they born for something positive..... they feel happy to be a part of all that world...to be someone that made some...that is important...... money is secondary....more a need to keep the ball rolling than the main target.
But, infortunattely, there are guys that cannot understand that....they do not believe in positive feelings.... they just are not able to feel this way.
the image, with bad quality and bad focus, is a customized AKSA, i am finishing them...i reduced the details, as there are modifications not to be shown...not authorized by Hugh...this one is 80 watts, 8 ohms....have a chip into the feedback line, use triple darlington and the output transistor is not in the board...also the bias unit will go out of the board.
regards,
Carlos
I feel it as many amplifiers, not a single one.
First because Hugh made many versions, this way he has always some versions untouched, even if some design could be victim of piracy.
It is interesting that no one conclude that AKSA is not a single unit.
Hugh make a extremelly kind follow up when you buy AKSA.... first he use to take care about his secrets, and he make you also responsable to keep the secrets, as he passed them to you, as an owner of his product, and you perceive clearly that the public dominium of his research results can be annoying to his business...so.... decent guys try to protect, the result of decent labor and efforts, that produces a delicious sound equipment, that turn us happy when we switch it on....and the thump is very small, something not annoying.
Hugh ask you clearly what you felt listening AKSA...and listening to your comments, he fast suggest the way to customise AKSA for your own needs...so, i am boomy...i love deep bass from old Organs...those from Churches...playing Dracula!...Giant Pipe Organs....and i felt some loss of deep bass.....he told me...change this and that....and i also include a limiter, as the amplifier cannot distort anyway...i is limited in the maximum undistorted level and the input is controled. ( old fashioned zener triggered AGC by DX)
So, not only nice when standard, but also flexible to your personal tastes..... the follow up produces the satisfaction to talk directly with the designer, and the answers needed to customize AKSA to your own musical taste.
There's a version that reproduces Saxophone with that natural harshing characteristic that the instrument produces.... there are people that do not like that natural sound...and Hugh knows how to change it if needed by some customer...also the breath you can perceive in some flute, this can be attenuated too.
But there are people that do not want to know those things....there are guys that want the secret for free, to copy, to reproduce, as already happened in one country but the long arm of the law reached the guy....also he lost credit in his own country.
In my country, if someone start to produce Hugh design, without his permission...i will take care of the problem personally, as more than AKSA owner, he is a decent and honest man that produced amplifiers that are making me very happy those last years...and more than that....he is a friend....those friends that knows your son by his name, and that ask you how your son is going related some school problem.
This is positive...friendship, love, respect....i do not think that many guys that has a special pleasure to "create doubts about Aspen Amplifiers qualities", if those guys are moved by so positive feelings, as those, moves Hugh.
There are those "cloudy" and bad mood guys....easy to detect, we all know them.
Always searching for some detail to send less credit...people that never met Hugh, that never listen AKSA, and that hates Hugh....and they do not even know their reasons.....i think the envy is the feeling that move them.
Too feed those guy's envy.... to make them fat of envy..i will tell you some.
Mr. Hugh Dean is an Military Officer, retired and receiving a good money to keep his life going, also his father has enough money, also his wife is a Military Officer retired.... the daugther have their own work, his business is going very well...and if he decide to stop produce Aksa...he will be listening his products,confortable since his last days...without any worries, as he has plenty conditions to have a confortable and peacefull life...... oh envy...oh pain!....carefull you that is feeling envy..... making too much strengh may broke some teeth...relax man!
He simply is beeing happy producing AKSA and developing more products... the money entering is re-applied in his business and in his car's collection....also Bikes collection.
There are moments that he travel 200 miles to visit a customer, even knowing that profit will be "eated" by the fuel..... he do not bother,...he feel happy when he perceive that the customer turns happy and make sweet comments about the sonics.
Those guys..... that have some passion related their products, as Graham Maynard, respectable man, Michael Bittner,other impressive designer and Hugh Dean, feel good to have their amplifiers playing in many homes....they feel that they born for something positive..... they feel happy to be a part of all that world...to be someone that made some...that is important...... money is secondary....more a need to keep the ball rolling than the main target.
But, infortunattely, there are guys that cannot understand that....they do not believe in positive feelings.... they just are not able to feel this way.
the image, with bad quality and bad focus, is a customized AKSA, i am finishing them...i reduced the details, as there are modifications not to be shown...not authorized by Hugh...this one is 80 watts, 8 ohms....have a chip into the feedback line, use triple darlington and the output transistor is not in the board...also the bias unit will go out of the board.
regards,
Carlos
Attachments
Hi HUGH,
Carlos is good Guy, everybody loves him....he is funny..nourishes these thread with his ample literature free flows....
How do you feel about ,,if he isn't posting in this thread....
Carlos always remind me of Brazilian beaches..good people like you, him also......
K a n w a r
Carlos is good Guy, everybody loves him....he is funny..nourishes these thread with his ample literature free flows....
How do you feel about ,,if he isn't posting in this thread....
Carlos always remind me of Brazilian beaches..good people like you, him also......
K a n w a r
Kanwar,
You are absolutely right; presently I'm listening to a long audio tape from Carlos. I can promise you that his literate flow does not compare to his spoken word..........
His English is very good; he's a natural linguist, no doubt.
I am always grateful for his attention and nourishing of the thread. Once off the first page, it's gone forever......
Cheers,
Hugh
You are absolutely right; presently I'm listening to a long audio tape from Carlos. I can promise you that his literate flow does not compare to his spoken word..........
His English is very good; he's a natural linguist, no doubt.I am always grateful for his attention and nourishing of the thread. Once off the first page, it's gone forever......
Cheers,
Hugh
Hi Hugh,
Regarding current mirrors:
OK, now I see what you mean. You are talking DC currents, not AC currents. Yes, that is a good point that seems usually neglected. Self says nothing about it, although I have only read his comprehensive web page, not his book. According to Self, current mirrors give lower distorsion, and I think his figures were measured, not simulated, in this case.
Anyway, I spent some time doing some Spice simulations to see what happen if deliberately misbalancing the current mirror, as you suggest. Of course, there are zillions of parameters one can vary, and I just tried a few things, so take this for what it's worth. Anyway, I tried the diff pair with and without 100 Ohm emitter degenration, which made a big difference in distorsion, as expected.
In both of these cases, I tried balanced and unbalanced current mirror, using 2 x 100 Ohms and 110 + 100 Ohms, respectively. Equal resistors gave a 6.3 % difference in diff pair Icq, while 110 and 100 Ohm reduced this to 1.1 %. However, I could not see any difference in distorsion with the two different mirrors. That might be because I used only 10 mV input signal, and the more unbalanced the diff pair is, the less margin it has before it "leaves the linear region". So I wouldn't draw any conclusion from this more than that it need not be a big problem, but perhaps it can be under other circumstances. There are so many things one can alter and fine tune.
If still considering it a problem, one may also use a buffered VAS, or a darlington VAS to get negligible bias current for the VAS, or one can use a diff pair in the VAS, thus loading both halves of the input diff pair equally. There is also the possibility of using an extra dummy VAS having as its only purpose to provide both halves with equal load.
Regarding current mirrors:
OK, now I see what you mean. You are talking DC currents, not AC currents. Yes, that is a good point that seems usually neglected. Self says nothing about it, although I have only read his comprehensive web page, not his book. According to Self, current mirrors give lower distorsion, and I think his figures were measured, not simulated, in this case.
Anyway, I spent some time doing some Spice simulations to see what happen if deliberately misbalancing the current mirror, as you suggest. Of course, there are zillions of parameters one can vary, and I just tried a few things, so take this for what it's worth. Anyway, I tried the diff pair with and without 100 Ohm emitter degenration, which made a big difference in distorsion, as expected.
In both of these cases, I tried balanced and unbalanced current mirror, using 2 x 100 Ohms and 110 + 100 Ohms, respectively. Equal resistors gave a 6.3 % difference in diff pair Icq, while 110 and 100 Ohm reduced this to 1.1 %. However, I could not see any difference in distorsion with the two different mirrors. That might be because I used only 10 mV input signal, and the more unbalanced the diff pair is, the less margin it has before it "leaves the linear region". So I wouldn't draw any conclusion from this more than that it need not be a big problem, but perhaps it can be under other circumstances. There are so many things one can alter and fine tune.
If still considering it a problem, one may also use a buffered VAS, or a darlington VAS to get negligible bias current for the VAS, or one can use a diff pair in the VAS, thus loading both halves of the input diff pair equally. There is also the possibility of using an extra dummy VAS having as its only purpose to provide both halves with equal load.
Re: I feel AKSA much more than a single board and an amplifier.
I know both Hugh Dean and MikeB are nice guys.
But Graham Maynard I do not know much about.
I have seen some Hi-Fi preamplifier schematic in internet, designed by him.
That's just about it, I know.
destroyer X said:
I know both Hugh Dean and MikeB are nice guys.
But Graham Maynard I do not know much about.
I have seen some Hi-Fi preamplifier schematic in internet, designed by him.
That's just about it, I know.
EW magazine.
You'll find his amplifier thread overhere.
Go back some 15 years, and you'll even meet Mr Greg Ball.
You'll find his amplifier thread overhere.
Go back some 15 years, and you'll even meet Mr Greg Ball.
Thanks Christer,
Yes, degeneration will stop the problem, naturally, by restoring balance. But you really should simulate with 1Vrms; a real figure from the real world. I believe you can hear the difference; I certainly can, and if so, this is interesting because the relative distortion levels are tiny.
Lineup,
Graham is absolutely brilliant, but difficult to follow and rather sensitive. I have trouble understanding many of his comments; his EW article was really tough and I did not understand all of it. I'm not sure if this is because he cannot explain things clearly, or I'm just not smart enough, probably a bit of both.
Regrettably Greg Ball is languishing in Texas. I had nothing to do with this, and I regret his demise because it will make him even more bitter. I don't agree always with his approach, but I suspect we are closer than he realises.......
Cheers,
Hugh
Yes, degeneration will stop the problem, naturally, by restoring balance. But you really should simulate with 1Vrms; a real figure from the real world. I believe you can hear the difference; I certainly can, and if so, this is interesting because the relative distortion levels are tiny.
Lineup,
Graham is absolutely brilliant, but difficult to follow and rather sensitive. I have trouble understanding many of his comments; his EW article was really tough and I did not understand all of it. I'm not sure if this is because he cannot explain things clearly, or I'm just not smart enough, probably a bit of both.
Regrettably Greg Ball is languishing in Texas. I had nothing to do with this, and I regret his demise because it will make him even more bitter. I don't agree always with his approach, but I suspect we are closer than he realises.......
Cheers,
Hugh
AKSA said:
Yes, but this was open loop, you see. You never get 1 V differential voltage on the diff pair due to the global feedback, so 10 mV is actually quite high, and did show quite heavy distorsion. The common mode voltage will be roughly the same as the input voltage though, but I neglected common mode voltages in this simulation, since that is not likely to be interesting for this particular topic, although it does cause distorsion for other reasons.
BTW, emitter degeneration on the diff pair does not restore the balance, but makes the diff pair less sensitive to the imbalance.
Hugh,
Don't worry, I should have remarked from the start that I was doing open loop simulation. It was so obvious to me to do it that way, that I never thought of commenting on it.
Don't worry, I should have remarked from the start that I was doing open loop simulation. It was so obvious to me to do it that way, that I never thought of commenting on it.
Poor Hugh...his best dreams is that my messages turns smaller
Your fault....beeing so kind.... answering every details.
If you start to be bad....not answering, will receive less mails and smaller mails....ahahahaha!
Thank you Hugh
Carlos
Your fault....beeing so kind.... answering every details.
If you start to be bad....not answering, will receive less mails and smaller mails....ahahahaha!
Thank you Hugh
Carlos
Re: Very kind from you Kanwar.... we are friends, reason why you apreciate me
Hey Carlos.... So are the beautiful women!
I spent N.Y. eve on Copacabana (Rio) I think
it was 1987... lots of fun
Cheers,
Terry
destroyer X said:
Hey Carlos.... So are the beautiful women!
I spent N.Y. eve on Copacabana (Rio) I think
it was 1987... lots of fun
Cheers,
Terry
We have got maybe 6-7 good posts with listening impressions of AKSA amplifiers.
I think this is a good result and give us some little idea of 'the AKSA sound'.
I know quite a many have built AKSA.
It is possible we will get even 5-10 more posts
that can try to describe how AKSA sounds in different setups
and also make some compare to other amps they have.
Thanks so far to all who have made an effort
to enlighten us in some way in this topic.
🙂
I think this is a good result and give us some little idea of 'the AKSA sound'.
I know quite a many have built AKSA.
It is possible we will get even 5-10 more posts
that can try to describe how AKSA sounds in different setups
and also make some compare to other amps they have.
Thanks so far to all who have made an effort
to enlighten us in some way in this topic.
🙂
Hi Hugh and Raj,
No problem. For some reason I have the impression that Raj lives somewhere North of London (and in UK terms 180 miles is quite a long way - no sniggering please, you Aussies). Anyway Raj is welcome to come and have a listen and bring his WN for comparison.
Raj - send me a PM if you're interested and I'll reply with my phone number.
Whilst I'm typing I may as well add my subjective views, my 3 favourite amps are:- Leach, AKSA 100N and Leak ST20 (not is any particular order).
I recently auditioned £5.7K worth a very highly regarded CDP/Pre/Power combo and I would take either of the 3 above any day of the week. Long live DIY! (of course the Leak is not DIY but it still makes a mockery of many modern commercial offerings).
Cheers,
Dave
PS I'm trying to give up DIY amps as I have too many, but Ampguru's effort looks interesting (although his moniker puts me off somewhat).
No problem. For some reason I have the impression that Raj lives somewhere North of London (and in UK terms 180 miles is quite a long way - no sniggering please, you Aussies). Anyway Raj is welcome to come and have a listen and bring his WN for comparison.
Raj - send me a PM if you're interested and I'll reply with my phone number.
Whilst I'm typing I may as well add my subjective views, my 3 favourite amps are:- Leach, AKSA 100N and Leak ST20 (not is any particular order).
I recently auditioned £5.7K worth a very highly regarded CDP/Pre/Power combo and I would take either of the 3 above any day of the week. Long live DIY! (of course the Leak is not DIY but it still makes a mockery of many modern commercial offerings).
Cheers,
Dave
PS I'm trying to give up DIY amps as I have too many, but Ampguru's effort looks interesting (although his moniker puts me off somewhat).
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