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I have the second channel of the line stage version running so i can listen in Stereo.
It is too early to tell how it sounds because i had made changes to my system since last time.
I have put back my Lyra Atlas after some experiments with vintage cartridges like a Technics EPC-310 and a rebuild Accuphase AC2.
First the sound was a litlle dark. I found that the VTA was wrong, the arm was too low in the back. After adjusting all sounded very familiar.
This stage is certainly transparent enough to show VTA differences easy.
I am also learning to do the various adjustments like source degeneration of the output MosFets and trimming the CCS´s.
An interesting feature of this curcuit is that you can make second harmonic dominant or trimming for lowest THD where second and third are aprox. of the same level but in total lower then the second harmonic trim.
I decided on the second harmonic dominant bit i will maybe also try the minimum THD trim.
It is too early to tell how it sounds because i had made changes to my system since last time.
I have put back my Lyra Atlas after some experiments with vintage cartridges like a Technics EPC-310 and a rebuild Accuphase AC2.
First the sound was a litlle dark. I found that the VTA was wrong, the arm was too low in the back. After adjusting all sounded very familiar.
This stage is certainly transparent enough to show VTA differences easy.
I am also learning to do the various adjustments like source degeneration of the output MosFets and trimming the CCS´s.
An interesting feature of this curcuit is that you can make second harmonic dominant or trimming for lowest THD where second and third are aprox. of the same level but in total lower then the second harmonic trim.
I decided on the second harmonic dominant bit i will maybe also try the minimum THD trim.
I have now put the new linestage buffer ( 6dB gain ) into my CD based system.
All i can say is that it sounds quite transparent.
Compared to my usual heroic build linestage it is maybe a bit lighter in tone.
I have to try more CDs to come to a conclusion.
All i can say is that it sounds quite transparent.
Compared to my usual heroic build linestage it is maybe a bit lighter in tone.
I have to try more CDs to come to a conclusion.
The session tonight has shown that the new Buffer-Linestage is more transparent then my
standart " tin can " linestage.
First i had thought the new thing sounded somewhat lighter.
That has changed after some hours of use.
It is now extremely clear and transparent but also drives the deep bass along, no problem.
To fully apreaciate the new transparency i switched from my 2 x 30W KT120 tube monoblocks to the ultra clean Mace poweramp.
The sound i get from my setup now is super open, dynamic and three dimensinal but without fatigue.
The system comprises the Forsell Air Refference CD player, the new buff-line, the Mace amp and prototype speakers with active subwoofer and ribbon tweeter.
It´s good that progress is still possible.
standart " tin can " linestage.
First i had thought the new thing sounded somewhat lighter.
That has changed after some hours of use.
It is now extremely clear and transparent but also drives the deep bass along, no problem.
To fully apreaciate the new transparency i switched from my 2 x 30W KT120 tube monoblocks to the ultra clean Mace poweramp.
The sound i get from my setup now is super open, dynamic and three dimensinal but without fatigue.
The system comprises the Forsell Air Refference CD player, the new buff-line, the Mace amp and prototype speakers with active subwoofer and ribbon tweeter.
It´s good that progress is still possible.
Attachments
I think this is really cool:
OM/ONE: The world's first levitating bluetooth speaker | Mail Online
The levitation base can double as a magnetic battery charger. It would be neat to design a tweeter amp for one of these. I suppose you would want an extremely efficient amplifier to maximize battery life. Then again, if you cut out the bass notes it can't reproduce and use an efficient transducer, it will probably require much less power.
OM/ONE: The world's first levitating bluetooth speaker | Mail Online
The levitation base can double as a magnetic battery charger. It would be neat to design a tweeter amp for one of these. I suppose you would want an extremely efficient amplifier to maximize battery life. Then again, if you cut out the bass notes it can't reproduce and use an efficient transducer, it will probably require much less power.
Just watching Babylon5 .....
the floating speaker just fits in!
😀😀😀
Babylon5... how can you, shows you in a totally different light 🙂
Hi,
By Graptar´s Hammer ... we are Shades, shady Shades 😀
jauu
Calvin
ps: Martina, is she the ´floating sweetheart´? ;-)
By Graptar´s Hammer ... we are Shades, shady Shades 😀
jauu
Calvin
ps: Martina, is she the ´floating sweetheart´? ;-)
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It is based on post 10043 but the feedback is AC coupled and there is only a pair of transdiodes
again like before.
I am sure Frans will send you the finished circuit also with tips how to adjust it for lowest offset.
Sorry that i did not get into more detail.
There is simply too little going on here and my time is limited.
again like before.
I am sure Frans will send you the finished circuit also with tips how to adjust it for lowest offset.
Sorry that i did not get into more detail.
There is simply too little going on here and my time is limited.
I think this is the one. RT2 is a 5k trimmer.
