AK4490 USB Dac with dsd support.

[sonnya]

I am on holiday till Friday .

The dac output stage is taken from the +15V. It generates a 6.1V reference.

The logic section and USB section runs of the 5.5V

 

[stajo]

Thanks Sonny. When you have the time, can you tell us if there is any reason to regulate the 5.5 V any further then with a LM317? Maybe refering to this post for example.

Enjoy your holiday!

 

[Nikos]

I do not find words to describe the admirable sound of this DAC
i supply it with one Reflector at 6.20V and one Bib +/-14V
Many thanks for all Sonny.

 

[sonnya]

Hi Eugene.

I have tried to send an email, but it does not go through.

 

[ekarter]

Hi Sonny,

Ok, sometimes it happens. Glad you answered here on the forum.

Well, do you hear difference between C0G ceramic and PPS film caps?

I am asking because I plan to do a headphone amp for your wonderful DAC

Eugene

 

[UnixMan]

Likely you do not need to do so... the discrete output stage is able to drive most headphones by itself. All you need is to add proper connectors.


Inviato dal mio GT-I9100 utilizzando Tapatalk

 

[ekarter]

That's cool, but I ordered DAC with ADA4898-1 shield instead of discrete solution. Also it will be convenient to have gain swith for different headphones and analog volume control as well. Hence I am designing a headamp PCB which will be sit next to Sonny's DAC

Eugene

 

[viones]

Hi Sonny
Is there any pdf file describing the work of the front panel along with dac .
How much power consumption together (ma)?
Grazie,
Vio

 

[vitalica]

Hi vitalica.

They will be ready by next week.

We have changed the size of the heatsink and added a low noise smps before the +5.5V low noise regulator.

But everything still fits in the space

The wrongly made LPS (V1.0) does work but is limited to 200mA on the +/-15V and 100mA on the +5.5V (can be adjusted from +5V to +6V)

I sell the LPS V1.0 to 75€/pcs until the 9pcs are gone.

Hi Sonnya,

No news about the new version LPS?
Unfortunately, I can not finish the project

BR

 

[sonnya]

I work a lot on PCB designs at the moment. Just ask bavmike.

Tomorrow when i have spoken with the PCB manufacture i can tell more.

It uses larger heatsinks now. PCB has ventilation holes around the heatsinks.

The +5.5V which generated a low of heat is made up of an LM2674M simple switcher with fixed frequency so the noise from it is very low. On top of that it is followed by a low noise voltage regulator from TI. TPS7A4700. So the +5.5V is very low noise as well and heat is lower.

 

[ljufa]

Hi Sonnya,

Is this version of the frontpanel capable to send sw commands to any AK4490 dac?
At least volume control and filter settings change ...

New firmware for the frontpanel when used with the DAC only.

Two weeks ago we have made a new firmware for the frontpanel used with the DAC only.

 

[ijscobar]

I'm selling my dac/pre amp. Anyone interested please send me a PM.

http://www.diyaudio.com/forums/vendors-bazaar/274456-ak4490-usb-dac-dsd-support-86.html#post4612305

 

[darbost]

Hi Sonny, you have pm

 

[sonnya]

Now the LPS is ready and we have build 10 of them so that we can ship them out Wednesday

Sent from my iPhone using Tapatalk

 

[pegasus21]

Hi Sonny, so all of my stuff will be shipped out on Wednesday?

 

[darbost]

Hi Sonny, you have pm

 

[vitalica]

Hi Sonny,

I'll get myself LPS Wednesday? Thank you.

 

[bavmike]

Sonny's well known for his speedy responses

 

[sonnya]

No, it was late yesterday working on getting audio stuff ready to go out


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[tyman63]

Hi Sonnya,

Is this version of the frontpanel capable to send sw commands to any AK4490 dac?
At least volume control and filter settings change ...

I have similar question about 1 months ago and so far no response from Sonny.

Quite frustrating actually. It seems to use this DAC to its full potential, we will need to buy the full package of pre-amp, front panel, chassis etc.