A NOS 192/24 DAC with the PCM1794 (and WaveIO USB input) - Page 83 - diyAudio
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Old 30th December 2013, 08:40 AM   #821
SimonJ is offline SimonJ  United Kingdom
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How did the listening sessions go with your friends Doede? Will be interested to see your. Ew circuits and how you used the 244 IC as that is a simple and great idea for signal switching
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Old 30th December 2013, 10:15 AM   #822
rfthon is offline rfthon  Netherlands
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Default dddac 1794

The pictures shows my project 'the DDDac 1794'
I have started with one converter deck and expanded with decks till I reached the top plate of the housing. :-)
The drilling and engraving is done by company Schaeffer in Germany and is very precise made by computer controlled cnc, Schaeffer also delivers the software for Mac and Windows to design the lay-out.
Nice software and easy to use.
Costs for the front-panel 51 euro and back-panel 45 euro, this price is without material and transport-costs.
I have the casing from an Italian company Hi-Fi 2000 which costed 120 euro (Modu 1NSLA02280B).

I use cinch chassis connectors from Cardas because I also use Cardas cinch cable.(perfectly fit between cinch plug and cinch chassis part)
Neutrik XLR and 75 ohm cinch connector from WBT.
This WBT connector is for the SPDIF input.

The sound of the dac 1794 is very relaxed and remind me of the 'analog days' when I used a Linn LP12 with SME IV arm.
It is relaxed but also very detailed.
The HiRez recordings can sound better and I say 'can' because many times it doesn't sound better.
An average recording in HiRez sounds not as good as a high quality recording on cd format.
Listen to Domnérus Antiphone Blues on Lim records and you'll notice how good cd can be.
On the other hand listen to a very good HiRez recording of label L2 “The view was all in lines” or “Remote Galaxy” and you will experience the quality of HiRez.
How does this dac 1794 deliver itself against the competition.
I have listen to a minerva dac (Weiss) which sounds to my ears nervous.
I think the dddac 1794 is two steps ahead of the Weiss dac.
I own a LessLoss dac, a very good dac using batteries for the Analog part and transformer for the Digital part.
What I loved from the LessLoss dac was the bass response I don't know if it was the Batteries or simple analog stage which made the bass response as good as it was.
But now I have to say, the ddac 1794 is better in all parts of the music spectrum.
From the lowest to the highest note, more space around the instruments,more definition,cleaner highs Yes I'm talking about cd format.
Good HiRez recording are the icing on the cake, more definition,dynamics and natural sound.
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Old 30th December 2013, 11:19 AM   #823
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Rfthon
What are you using for output....trafo or caps ?
great works this casing for dac---
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Old 30th December 2013, 12:11 PM   #824
rfthon is offline rfthon  Netherlands
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Hello beardman,

First I was using Mundorf caps, the very known gold ,silver and oil type.
Later on I tried the Cinemag trafo.
There is a certain difference in sound.
The Mundorf has a little more push in the high frequencies the Cinemag sounds a little more rounded.The main reason I use the Cinemag is because of the isolation(galvanic).
Noise (digital?) is better isolated.
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Old 31st December 2013, 02:02 AM   #825
Chanh is offline Chanh  Australia
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Quote:
Originally Posted by SimonJ View Post
How did the listening sessions go with your friends Doede?
+1 here.
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Old 31st December 2013, 07:33 AM   #826
WalterW is offline WalterW  Netherlands
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rfthon, very nice! Great case. Nice gold connectors at the back

What is it, you taped inside your housing, the black stuff? EMI related?

I see you didn't like the ugly wirewounds in the PSU too I let them in cause some inductance isn't a bad thing at that place in the PSU, but....

Walter
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Old 31st December 2013, 08:07 AM   #827
rfthon is offline rfthon  Netherlands
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Hello Walter,

The black panels inside the housing is from Soundcoat (partsconnexion).
It is just only against vibration.
I know the wirewound resistors from loudspeaker building, couldn't resist to replace them by Mills ;-]
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Old 31st December 2013, 09:14 AM   #828
dddac is offline dddac  Germany
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Quote:
Originally Posted by Chanh View Post
+1 here.


OK, Pics first (or it did not happen )

Set up was the 8 Decks Version of the DDDAC1794S with Silver Plus USB Cable, WaveIO with 2.15 and 1.65 Version Drivers. CD Player Klaus his high end Sony 777. Notebook WIN8.1 with JRiver19 and Foobar and Mac Mini with Audirvana. 8TB NAS box with Music. Also the Sotwer TVC Versions. To compare my original 4 DECK DAC with "normal" Sowter output

and Klaus his fantastic GOTO System
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Last edited by dddac; 31st December 2013 at 09:17 AM.
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Old 31st December 2013, 09:32 AM   #829
dddac is offline dddac  Germany
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Default TEST-day DDDAC1794S

Goal was to just test through the new DAC and try some things with players, cables etc. But most of all, testing the new DAC on USB and SPDIF
This is in summary what came out:
8 Decks version works 100%. Sound is very fluid and analogue, especially on low volume. Lots of detail and very solid and contoured bass.
SPDIF versus USB. USB rules… Spdif is just behind in clarity and spatial sound stage. USB has bit more texture in voices. Spdif you could say is more rounded, les hearing through. (Still clearly better than stand-alone CD player with its own analog output)
Sowter versus Capacitor output. More space, more fluid without losing high presence (not so rounded like Cinemag 15B) As Tuyen write: you hear deeper in the music. Background is extremely quiet.
USB Cables, Less pronounce. Both Silver plus and Klaus his Kimber Cable play very neutral and open. Basic cable loses a bit detail. BUT not as big a difference between transformers and capacitors…
Music players: Foobar has been catching up. Difference is almost nothing left over (or is it WIN 8.1?) MAC is just bit more open. Could not really tell difference with JRiver (but it plays FLAC …)
8 deck versus 4 decks. Clear improvement in low level bass. More rich details and micro level detail. Is it worth the 4 extra Decks? If no budget constraints? Big yes. Can you live without? Of course (But Reinhard for sure not, haha)
By the way, on Feb 15 we have a new session for the DACs with Jean Hiraga, who owns now a 120 chip version of my older 1543 dac. He also wants the new 1794S 8 deck DAC, so we do some shoot out day again. Questions for 16 Decks are already coming in. Would be nice to try ;-)
What else…. Lots of music! We sometime totally forget to watch for sound differences and were just drifting away on the music. That is our aim anyway, isn’t it?
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Old 31st December 2013, 10:01 AM   #830
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Hi all, I'm totally new here and plan to start the DDDAC build fairly soon.
I have read about a third of this monster thread but as most of it is over my head I have only been able to pick out some nuggets of wisdom.
I may have some questions a long the way.

Thanks

James
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