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

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dddac

dddac

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Joined 2003
blog.dddac.com
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#1
As I just released the DDDAC1794MK3 series (Dac and PSU) I thought it might be a good idea to set up a support thread for technical and background question, discussion and support.

The release post is here: http://blog.dddac.com/the-new-dddac1794mk3-dac-and-psu/

For those already interested in the construction and installation manuals:

DAC: http://blog.dddac.com/wp-content/up...tion-DDDAC1794MK3-DAC-Version-2.6-rev-1.4.pdf
PSU: http://blog.dddac.com/wp-content/up...ction-DDDAC1794MK3-PSU-Version-2.5-rev1.4.pdf

I am not a great photographer, nor do I have a product photobooth, so here is a somewhat lousy picture of my test set-up:

  • Power transformer 2x12 Vac
  • double DDDAC PSU
  • two AE Chokes (my specs: Amorphe 1H 4 Ohm)
  • DAC Board DDDAC1794MK3
  • Sowter Output Transformers

1713075742704.png


looking forward to some good discussions 🙂

Doede
http://blog.dddac.com/
 
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#3
I think you have a point, it is not very clear. I will rework this text…

ok try again
each board has two channels with each 2 chips - so you can make stereo with each channel having 2 chips in parallel. like old two deck
each board can de assigned to only R or L signal and also have both channels of the board paralleled. Resulting in one board with mono L or R and 4. chips in parallel. if you use two boards, one as L and one as R in mono mode you will have stereo again with each L and R 4 chips in parallel. Like the old 4 deck.

hope I did not make it more complex. 🤔 May be I should make a schematic drawing showing these two options
 
#4
Ok, that's just what I thought. In the blog post maybe just remove the additional bullet point saying that "further paralleling is possible", because it seems it's actually not possible. 4 chips per channel is the max.

I would have preferred more chips in parallel (8 or even 16), but I guess you had your reasons to max out at 4.
 
#5
Well, it is in fact possible, you can daisy chain more boards and parallel the outputs. If this is useful is unknown, as I did not test it sound wise.
i also recommended for the previous version to stop at 4 decks. Very few went beyond that because they just were intrigued and tried it. It does improve, but is it worth the extra cost ? I think no, but some went for “cost no object” 😎 after all it is a hobby….
 
#7
On a separate note. I know my blog site has no safety certificate yet. I am working on this. My hoster Is restrictive in my current subscription and I need to move all of my database etc. I am planning to do this somewhere in may… rest assure my blog is a safe space 🙂
 
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