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Old 28th October 2011, 11:36 PM   #21
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I tried placing your op-amp in front of my headphone amp driving HD800 with a bypass switch. It is different. How different, well I can explain it in this way: You take an extremely beautiful girl to bed and experience awful sex. Then the next time you take an extremely ugly stuttering girl to bed and have great sex. Both objective and outcome are the same and both are disappointing but in different ways - so what are we looking for?
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Old 29th October 2011, 12:10 AM   #22
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Originally Posted by Nico Ras View Post
Your concept is interesting but it looks like the character is defined by the front end op-amp according to my simulation. In that case I can hang it onto any amplifier and enjoy the fact that it is virtually free from all harmonics other than the second.

I haven't sat on my hands you know, I was intrigued by what you demonstrated but I am trying to understand the objective and the process that drove the idea beside light particles.
Dear Nico,
What I have is a vague idea of what TI have done in the OPA134, blame it on the whatever they have hidden that I dont know about

The choice of op-amp is flexible and what is really interesting is the amplifier.

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You had better share your thoughts so we can chip in. The last secretive guy here was thrown overboard as shark bait.
Am talking

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Originally Posted by Nico Ras View Post
I tried placing your op-amp in front of my headphone amp driving HD800 with a bypass switch. It is different. How different, well I can explain it in this way: You take an extremely beautiful girl to bed and experience awful sex. Then the next time you take an extremely ugly stuttering girl to bed and have great sex. Both objective and outcome are the same and both are disappointing but in different ways - so what are we looking for?
Lets have great everything , beauty and awful are subjective .
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Old 29th October 2011, 02:07 AM   #23
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Default njm4565

Here is the integrated performance with NJM4565 on board. Rise and shine Nico ..Really how was it?
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Old 29th October 2011, 06:05 AM   #24
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Originally Posted by Nico Ras View Post
Then the next time you take an extremely ugly stuttering girl to bed and have great sex.
Did more research on your setup and came across Product Review - HeadRoom Micro DAC and Micro Amp Headphone Amplifier.

So if you had a great time with the buffer. I expect the amplifier will blow you away
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Old 29th October 2011, 06:42 PM   #25
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Hi Onaudio, building an amp on a whim is not always possible, because there are so many other variables that will affect the outcome, the simulation proved interesting.

Thus it was a matter of trying your ideas on a similar topology rather than just simulating and viewing a graph trying to conclude whether subjectively it could sound good or bad.

I think this is where a lot of us go wrong, we simply try to draw conclusions from simulations.

Its performance is different, I cannot comment what part of different I enjoyed, the outcome was pleasing. But to conclude that it is the best I have heard would be unfair, one has to get used to the difference and listen to a lot of material before coming to any reasonable conclusion.

So it is best to leave the lights off, then you can be motivated by only performance.
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Old 31st October 2011, 04:34 AM   #26
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Its performance is different, I cannot comment what part of different I enjoyed, the outcome was pleasing. But to conclude that it is the best I have heard would be unfair, one has to get used to the difference and listen to a lot of material before coming to any reasonable conclusion.
Click the image to open in full size.

Thanks for the good work Nico. I am targeting at-least 20% of the about 200k members, to build this amplifier or the SYMEF amplifier. For it to be a success 80% should give a favorable response, that's about 30k members .

I am still waiting for pcb design volunteers. Well we have some way to go.

Thanks again Click the image to open in full size.
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Old 31st October 2011, 04:09 PM   #27
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Sorry Onaudio cannot be of more help at this time. I am interested in learning about your algorithm predicting what is deemed acceptable and what not - can this be applied to other than audio scenarios.
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Old 1st November 2011, 02:03 AM   #28
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Sorry Onaudio cannot be of more help at this time. I am interested in learning about your algorithm predicting what is deemed acceptable and what not - can this be applied to other than audio scenarios.
Dear Nico,

The bag of treats am using is not unique to audio, but the feature selection is .
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Old 4th November 2011, 03:52 PM   #29
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Default pcb

Hi Alex,

Here is the full amplifier.

Thanks again.
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Old 6th November 2011, 11:40 AM   #30
alex mm is offline alex mm  Romania
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Hi OnAudio ,
Here is the full amplifier PCB even protection on board
Alex.
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File Type: jpg H.A. PCB ALL COLOR.jpg (417.5 KB, 617 views)
File Type: jpg H.A. FHOTO GREEN.jpg (319.5 KB, 431 views)
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File Type: pdf H.A PCB REV 1.0 GREY ALL.pdf (132.5 KB, 196 views)

Last edited by alex mm; 6th November 2011 at 11:42 AM.
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