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Soekris discrete R2R DAC?

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Hi Guys

I am curious about this DAC. But this thread seems to have died a bit. Has anyone got a fully working unit going that sounds great? I was thinking of putting this board inside an Audio Note DAC kit, so power supply and output board all ready. I am thinking the board needs a proper line stage and that may be the issue with bass fall off and impedance matching? But without some folk glowing over the sound quality, I am running out of confidence in it.

Still, it could be a nice project as a TotalDAC base model is 6K Euros.

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I'm using it as my 2nd rig for awhile now.

Good dac, great bang for the buck, even better with power supply modifications.

Really natural organic non-GMO sound, not tiring at all. Probably not in the same tier with TotalDAC but can definitely compete with some DACs in 1k range.

 

 

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Here's my build of the Rev2 dam1021 that I finished over the holidays. A so called hotrodded DCB1 (~500mA CCS) provides power to the dam1021 via its shunt regs and also buffers the DAC's raw outputs. It further provides an output muting relay. The DCB1's input impedance is set to about 18k, roughly 30 times the dam's output impedance. Digital inputs are diyinhk Toslink and XMOS USB module, the latter and the dam's isolated i2c inputs are powered by a BIB 3.3V regulator (~200mA CCS). The transistors of all the regs are bolted to the chassis' bottom to spread the heat.

I initially ran into problems with disrupted audio when using the XMOS USB interface, which I managed to cure by ensuring that the USB-socket's housing stayed insulated from the grounded chassis when the USB cable was plugged in. Took me a while to figure out, as I first suspected a latency issue of the operating system...

The digital interconnects to the dam1021 are made from 10cm CAT5e twisted pairs. Signal interconnects are RG316/U.

The dam1021 is stock for now, but I'm planning on trying different mods soon.

It took me about three days to build and I really like what I'm hearing. To my ears there's a nice resolution in the bass region and the instruments' timbre is very nicely conveyed. It's very easy to listen to.

 

resize (10).jpg

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My Build, LCD Display and Control board is designed by Hong Kong DIYer "Kevinyip".

But I didn't use onboard reciver,RS232 and display only

Source inputs are connected from backplane which I bought from TAOBAO

DSC_4923-800x532.jpg

 

DSC_4924-800x532.jpg

DSC_4928-800x532.jpg

 

DSC_4936-800x532.jpg

 

Edited by ang728
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If you are a purchaser of the rev 1, see this thread on DiyAudio:

http://www.diyaudio.com/forums/digital-line-level/294351-soekris-sonics-comparisons-other-stuff-5.html#post5110663

Original purchasers of the rev 1 dac boards purchased them assuming, based on the initial sales pitch, that they were finished, tested, functions as advertised, products. Only afterwards did Soekris Engineering admit they were beta tests boards with design issues and did not live up to his initial claims. He has refused to offer any refunds, credits, etc. despite a classic bait and switch.

If you were a victim of Soekris Engineering’s dishonest business practices, contact me.

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........... shoulda got the YGGY.............   :P

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Not much support for your position in the diyaudio thread. I disagree with the moderator warning there, but that is the way that forum is run, so you have to abide by it.
Not sure why you posted this here, but I'd read your welcome pm if you hope to stick around...


Sent from my iPhone using Tapatalk

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i think he did a google search and just ran through the different forums in order to create a case

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I bought a v1, knowing full well it was a first release. Anyone who knows anything about product development- and that should apply to diyers - would know that perfection from the get go is not a realistic expectation. Soekris released the board to great expectations, and to his credit (and benefit) listened to the community that helped improve the product quickly. Though Soren went the commercial route, he also preserved the diy line. To me, this sounds like a win-win, and helps the industry. Soekris "crowdsourced" some of his dev costs, and anyone, including competitors, can read diyaudio and some of the lessons-learned (in particular re. Filter design).

for v1, you can get a daughter board from nordmundss that takes the performance higher (buffers), and resolve the shutdown "plop" . Finally, a couple of smd caps for the shift registers was less than $2. Ability to solder such tiny things, priceless!

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