I think you should build an output Stage yourself. Then we don't have to discuss this, and you will be happy what you have achieved
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There is no need for that..
Every decent opamp like AD797 or LT1363 will do great job..
Even toy like DRV603 sounds better than discrete output shield in such configuration..
Dear vulejov, we do appreciate your goodwill and empathy you use to comment and improve the nice product of sonnya - thank you!
Discrete output shield in this configuration begin to increase THD from 200Hz, NE5532 is far bettter than that, 741 is little better than that..
I have no doubt that someone like that sound, but idea to use this output still makes no sense..
I really do not know what you want.
You ask about features on PM and so on. You ask about schematics and i post them.
You then comment that even an LM741 is better!?
I really do not know what to believe about you. Serbia? mmhhh ... Are you affiliated with someone in the forum?
Now to give some impression here of the performance of the discrete at 10KHz. with 1Kohm load.
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+04 2.000e+00 1.000e+00 171.53° 0.00°
2 2.000e+04 4.869e-06 2.434e-06 65.22° -106.31°
3 3.000e+04 6.168e-07 3.084e-07 -109.76° -281.29°
4 4.000e+04 6.568e-08 3.283e-08 165.88° -5.65°
5 5.000e+04 1.051e-08 5.252e-09 63.65° -107.89°
6 6.000e+04 1.303e-09 6.516e-10 -36.55° -208.08°
7 7.000e+04 1.851e-10 9.252e-11 -139.92° -311.45°
8 8.000e+04 2.592e-11 1.296e-11 134.14° -37.39°
9 9.000e+04 5.322e-12 2.661e-12 -164.56° -336.09°
Total Harmonic Distortion: 0.000245%(0.000247%)
And the FFT simulation is attached. I have real world measurement for the DAC also that backs it up.
BR
Sonny
You ask about features on PM and so on. You ask about schematics and i post them.
You then comment that even an LM741 is better!?
I really do not know what to believe about you. Serbia? mmhhh ... Are you affiliated with someone in the forum?
Now to give some impression here of the performance of the discrete at 10KHz. with 1Kohm load.
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+04 2.000e+00 1.000e+00 171.53° 0.00°
2 2.000e+04 4.869e-06 2.434e-06 65.22° -106.31°
3 3.000e+04 6.168e-07 3.084e-07 -109.76° -281.29°
4 4.000e+04 6.568e-08 3.283e-08 165.88° -5.65°
5 5.000e+04 1.051e-08 5.252e-09 63.65° -107.89°
6 6.000e+04 1.303e-09 6.516e-10 -36.55° -208.08°
7 7.000e+04 1.851e-10 9.252e-11 -139.92° -311.45°
8 8.000e+04 2.592e-11 1.296e-11 134.14° -37.39°
9 9.000e+04 5.322e-12 2.661e-12 -164.56° -336.09°
Total Harmonic Distortion: 0.000245%(0.000247%)
And the FFT simulation is attached. I have real world measurement for the DAC also that backs it up.
BR
Sonny
Attachments
An excuse from you would be appropriate here because I call my file opamp-simpel because opamp is an building block!...
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First you sad that you have 'real world' measurements, after that you atached screenshot from simulation?!
It would be better for you to excuse to all buyers of discrete output, and send them for free decent opamp version..
I said I also have the real world measurement. If you care to read. But let me find them and upload them.
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No that is how far I would go. I think you only are going to use it against me as with the last many posts from you.
I will repost the measurement but it is not to please you.
- Sonny
I will repost the measurement but it is not to please you.
- Sonny
Never mind, I will find some time to make simulation from your schematic.. it is impossible to have such THD.. if your real measurements and simulation which screenshot you upload are same, there is nothing to 'use against you'..
Today we got the Graviton phonostage boards. Heavily delayed! [emoji21]
The pcb manufacturer print line i had ordered them at first, has closed its business so I had to find another manufacturer that could produce the board in short time.
We will assemble them tomorrow.
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The pcb manufacturer print line i had ordered them at first, has closed its business so I had to find another manufacturer that could produce the board in short time.
We will assemble them tomorrow.
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vulejov,
Have you ever tried a 741 or a NE5532/34? They really don't make you jump off of your chair... If I speak for myself, and this is purely my own taste, the discrete output shield sounds REALLY amazing, nothing to ever compare against a NE5532, really.. Sonny also has an output shield based on ADA4898-1YRDZ if THD is what you like to listen to?!? Please buy the discrete output shield and listen to it, it is really a musical piece of equipment. I have both output shield and although the ADA4898-1YRDZ version is truly remarkable, I find the discrete one just more musical.
I'm not too sure if the argument is about musicality/Sound reproduction or THD figures, but if it has something to do with THD then I cannot comment since I do not own equipment precise enough to measure this. Anyways, not going to war with anyone here, just my subjective impressions of the output shield.
Ciao!
Do
Hi Vulejov
I have tried Sonnys two outputshields, the one with 4627 sounds really good, but I ended up buying the discrete because it plays music and sounds amazing - I may admit since I don't finding pleasure in measuring the sound, I just enjoy listening to the music it makes 🙂 - and I'm pretty sure you haven't tried that ;-)
No wonder printline closed, used them a couple of times for prototypes, but after my 2nd batch of significant substandard PCB's I gave up on them....
Now I use only PCBCART for my prototypes and sometime first series, they just work....