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Old 15th May 2009, 06:02 AM   #471
diyAudio Member
Join Date: Jun 2006
examining this dac designs I see

cs4397 and cs8416 - two pcbs - one ne5532
cs4397 and cs8416 - one pcb - two ne5532
cs4398 and dir9001 - one pcb - two ne5532

which of the 3 is best
I think first - It Is claimed to do 192 kHz and you can do mods - change tha caps
the ones with dir 9001 got lesser jitter but no 192 kHz

what are your choices
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Old 15th May 2009, 08:18 AM   #472
surfstu is offline surfstu  United Kingdom
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the dac i bought has the cs4398 with the 8416

it has input transformer on spdif

just thought i'd let you know there is another option to your list, which i personally thought to be the best option

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Old 15th May 2009, 10:16 AM   #473
legarem is offline legarem  Canada
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Actually, I think that the best is to buy the one with the upsampling board and USB and adding a digital transformer at the spdif input.

If you don't like upsampling, you can use it without the upsampling board
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Old 15th May 2009, 10:54 AM   #474
Join Date: Oct 2005
Location: Central Florida
I agree completely, I didn't think I would like upsampling, but I was wrong. YMMV

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Old 15th May 2009, 04:45 PM   #475
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Location: Canada
Originally posted by legarem
I won a pair of UTC HA-108 on eBay so another pair will be tried with this dac. They are big transformers.

I'll write a transformer battle soon. Here are the candidates

Yamaha Tamura GA80080
Lundahl LL1690
Little Studer uncapsulated
UTC HA-108
Chicago A-xx

Take care Marc ! price will increase on ePay with such revelations just send me your choice under personnal email much more secure
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Old 15th May 2009, 05:39 PM   #476
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how Is edcor 600 / 600 doing
are you test It
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Old 15th May 2009, 08:37 PM   #477
Mush is offline Mush  United States
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I didn't get the 600:600

I got the 10k:15k for experimental purposes.

I haven't had time to wire it in. I will try tonight. I know it will take several days to break in so I'll report sometime next week.
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Old 16th May 2009, 05:23 AM   #478
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could any experienced person explain the role of the audio transformer used in output stage and also what has to be the type 1:1 600/600 or whatever and why
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Old 16th May 2009, 08:48 AM   #479
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Sorry for the silly questions.

In legarem's diagram in post #418, the black wire is connected to the ground connection. Is that the analog ground of the DAC?


Also, on the same diagram, is the type of capacitor across the transformer primaries important (0.0047uF)?
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Old 16th May 2009, 10:41 AM   #480
Join Date: Oct 2005
Location: Central Florida
Those aren't silly questions.

The caps should be good quality polypropylene film.

The grounding issue is best answered by legarem, I wouldn't think it wise to defeat the isolation provided by the transformer by connecting one side of the secondary to the audio ground.

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