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The new DDDAC1794MK3 (DAC and PSU) - Technical and support thread

J

jasonb84

Member
Joined 2004
If we want to order the output transformer from Sowter do we simply ask for "DDDAC special"? And what about these custom chokes? I did read your initial blog post and trying to decide on values/amorphous etc.

How do the Sowters compare to what Audio Creative has on offer? Can only find a listing for their gold edition.
 
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dddac

dddac

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Joined 2003
blog.dddac.com
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The Sowters are not offered in their standard program. you can acquire them in my webshop….

for the custom chokes you can follow the link and inquire. AE would know what it is. If there is confusion, let me know, will sort it out with them…
 
mbrennwa

mbrennwa

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Joined 2005
audioroot.net
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dddac said:
The Sowters are not offered in their standard program. you can acquire them in my webshop….
Click to expand...
Hmmm. On dddac.com there is a "Sales/Webshop" tab with links to the Audio Creative webshop. The direct link to the DDDAC WEB SHOP does not work. Also, I don't think Audio Creative sells the Sowter transformer. They only have their "gold" transformer, but they don't say anything about the make/brand or the specifications of these trannies.
 
J

juliobozek

Member
Joined 2020
Hi Doede. I see that you used 100uF capacitors in the analog section of the new DDDAC MK3, but you used 10uF capacitors on the older DAC.

Is there a reason for this capacity bump? Is the sound of the new DAC improved because of this?

I understand that VCC-->GND caps depend on the power supply, but I am specifically interested in the VCOM capacitors and their values.

Btw I am really happy to see that DDDAC is still alive and improving. Thanks for that!
 
dddac

dddac

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The only reason is taking what is available, for the audio grade ones it starts at 100uF, which is fine as well. I did some tests and the value is all but critical. In the old ones I was able to get the 10uF easily, so it was 10uF. I did testing on the values and it turned out fine for all values above 10uF. For example only 100nF or 0,47UF was not ok. Too low. The higher it got, the better the noise and linearity was.
 
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dddac

dddac

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You are right! SMD is quite difficult without the right tools and experience (I know from building the prototypes :confused:), hence now the professional company pre-assembled boards. :)
 
dddac

dddac

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@mbrennwa

this is what the manual says.... I think that is explicit enough? but happy to change to make it more clear ?

1713789795594.png
 
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dddac

dddac

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Joined 2003
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Nice Idea to be flexible with the PSU for future update with Chokes. Do not solder the resistor which will be replaced later by the choke, but screw it in the terminal for the choke. :cool:


1713854218191.png


Thanks goes to Dick...
 
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