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Old 14th December 2012, 09:16 PM   #191
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Quote:
Originally Posted by Ryssen View Post
I use it to drive the headphones,maybe the ES9023 can drive the headphones,I havent tried it...yet.
Oh I see. I'm trying to understand the difference between an Amp and a Buffer. Is an buffer a type of amp?
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Old 14th December 2012, 09:20 PM   #192
Ryssen is offline Ryssen  Sweden
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Its an amp that amplifies only 1 time,if Im not mistaken.
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Old 14th December 2012, 09:21 PM   #193
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Originally Posted by Ryssen View Post
Its an amp that amplifies only 1 time,if Im not mistaken.
Unlike most amp where there is a gain and power portion?

*Thanks for clearing this up for me
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Old 17th December 2012, 10:39 PM   #194
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Conected the DAC to the "home stereo" to the bass channel (0-1400hz)instead of the AK4396 dac with jensen trafo output.
And the bass is more easy to follow..
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Old 18th December 2012, 05:22 AM   #195
qusp is offline qusp  Australia
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buffers usually have a VOLTAGE gain of 1 or less, but increased current. the primary role of the buffer is usually to ease the loading on the previous stage by providing a very high input impedance, while having low output impedance and more often than not has current gain as well, just no voltage gain
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Old 18th December 2012, 09:18 AM   #196
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Quote:
Originally Posted by samoloko View Post
thank you for reply

your trafo has higher VA than original recomended - much beter choise
how do you like your build

regards
Convince me with a listening test please. This is not an amp that can draw much current. Load is pretty constant in this case. You can use a 120 VA transformer but it won't make a difference.

It is in fashion for quite some years that transformers are largely overdimensioned and also that many people like to convert the too high voltage of the randomly chosen transformer to heat. However it is perfectly possible to use exactly the right transformer for the job. With amps overdimensioning the power transformer makes sense, with DACs I beg to differ.
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Last edited by jean-paul; 18th December 2012 at 09:25 AM.
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Old 18th December 2012, 10:05 AM   #197
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Originally Posted by pchw View Post
Indeed, lookie lookie, same cheap enclosure L First listen impression is also very good.
Cled is below the pcb, soldered at the led's pins.
Hi Fred, can you explain why you use 2 fuses in series ?

Nice build, how does the power supply perform ?
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Old 18th December 2012, 10:06 AM   #198
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Jean-Paul, how is V3 coming along? Any news?
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Old 18th December 2012, 10:46 AM   #199
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Well, I have a final version ready (single ended) but Subbu and I had some different opinions and a lack of time so the balanced version is not ready yet.
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Old 18th December 2012, 11:16 AM   #200
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Quote:
Originally Posted by Ryssen View Post
Changed the dac chip and the regulator and now its working..
Listening from my computer Spdif out from my ASUS card and a discrete buffer after driving the HD650.
I think I want to listen some more before telling..
Will post some pics later.

Diyaudio:

Click the image to open in full size.

Buffer:

Click the image to open in full size.

ES9023 in box:

Click the image to open in full size.
Hi ke,

Your DAC looks good, nice case ! I would not twist SPDIF wiring though. I have some questions:

- what is the voltage at the second filter cap ? Maybe you could have used :

https://www.elfa.se/elfa3~se_sv/elfa...x),_ei382_1187

- does this power transformer fit exactly (mechanically) ?

Just for my own curiosity...

I see you used an external fuse. No trust in the electrical safety of the power supply ?
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Last edited by jean-paul; 18th December 2012 at 11:32 AM.
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