New Async XMOS 384K/32bit with PCM5102 DAC on ebay - Page 2 - diyAudio
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Old 12th October 2013, 07:49 AM   #11
fivn is offline fivn  Finland
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The DAC is selling XMOS PCM5102 32Bit 384K Finished DAC Board W/ Headphone AMP here for $62 with a case. andynz, if you give thump up, I will buy it!
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Old 14th October 2013, 05:25 AM   #12
andynz is offline andynz  New Zealand
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I don't have any comments on the audio quality yet as I have been trying to sort out how to use an external supply. The description on the Ebay listing say 6-9v external however this is not true for the current boards shipping V1.3 2013/9/5.

The main input regulator for external supply was U13 which drops the 6-9v to 5v however this regulator is not installed on the current version so if you try using the 6-9v input it will not work.

To run v1.3 board with an external supply you need a 5v regulated supply. You need to cut the link between "S1" and "U" which currently feeds the USB 5v to the DAC. Then feed the regulated 5v on to the "E" pad and join this to the middle pad of "S1".

There are 5 separate regulator sections fed from the 5v which then supply power to the DAC, XMOS etc chips.

So in the next day or so I will build a good quality 5v supply and so how it sounds from there.

Thanks to the Ebay seller, zoe_tsang, who supplied the board and who has answered my email questions and confirmed with the factory that the external supply is now just 5v. If you try feeding it 6-9v you will probably end up with a non functional DAC.
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Old 14th October 2013, 05:30 AM   #13
andynz is offline andynz  New Zealand
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Quote:
Originally Posted by fivn View Post
The DAC is selling XMOS PCM5102 32Bit 384K Finished DAC Board W/ Headphone AMP here for $62 with a case. andynz, if you give thump up, I will buy it!
looks like a good price although I don't know what the seller is like for support. Beware the 7-9v external supply. If it is vs1.3 board that is not the case, it is 5v.

A thumbs up you say, I have hardly listened to it yet Just want to get a good power supply on it but the chipset looks good.

I should have a sound quality comment in a couple of days.
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Old 14th October 2013, 01:46 PM   #14
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Mine plays well 48,96,192khz but freezes on 44.1 and 88,2 khz. Does this mean this device is broken?
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Old 15th October 2013, 12:49 AM   #15
andynz is offline andynz  New Zealand
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Good news guys. I pulled together an old linear high quality 5v power supply to power the DAC and kept the Raspyfi on the wall wart 5v supply.

First impressions of the DAC are excellent. I have tried both 44.1 & 192 and they both sound great. Wide sound stage with pin sharp imaging. cymbals and other high frequencies sound natural, not over blown but with plenty of detail. No clicks or pops when changing sample rates. The PCM5102A is designed to mute during any errors or sample rate changes.

I sat through 4 tracks without flicking to the next which is always a good sign.

So next project is the improve the power supply and put the DAC in a nice case. I will probably use a bigger case than necessary so I can put a hefty linear power supply in.

With a good power supply this DAC is pretty darn good. Up there with the best.

My monitor system is ATC SCM40 passives 3 way with CDA2 pre & P1 dual mono amp. MPD player is Raspyfi 1.0
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Old 15th October 2013, 12:51 AM   #16
andynz is offline andynz  New Zealand
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Quote:
Originally Posted by smile2 View Post
Mine plays well 48,96,192khz but freezes on 44.1 and 88,2 khz. Does this mean this device is broken?
I would check with a different USB source first to make sure if it is your source or the DAC itself.
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Old 15th October 2013, 04:29 AM   #17
andynz is offline andynz  New Zealand
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I also tried some 384khz files this afternoon. Sound fantastic...if your into this numbers game!
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Old 15th October 2013, 05:30 AM   #18
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mine got lost and never received it so i finally got a refund
I'm happy because it was the first version without headphone output unlike this new version

so can you confirm that indeed the Windows driver doesn't have the periodical beeps as an evaluation driver from Thesycon?

also, have you tested it on it's headphone output? how does it behave with small loads like 32 ohm headphones? doest it have some sort of clipping?
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Old 15th October 2013, 12:43 PM   #19
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Quote:
Originally Posted by andynz View Post
I would check with a different USB source first to make sure if it is your source or the DAC itself.
Doesn't work at all with w7 or apple macbook.
Standard Ubuntu does not work either. Only aplay direct for 48000, 96000 and 192000 works on Ubuntu.
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Old 15th October 2013, 03:14 PM   #20
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this one looks very tempting. with external power are we sure the dac will be fed from that source or will it still be usb powered? chinese designs sometimes have baffling flaws like that from my experience.

and i thought 5102 didn't need coupling caps? the pair of wimas next to the chip doesn't look welcomed.
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