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Old 19th February 2012, 02:33 PM   #1
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Default Tiny USB DAC (PCM2704 based)

Chinese pcb, 16 euros shipped from Hong Kong.
Replaced power capacitors (with tantalum caps) and coupling caps (with WIMA mks).

Case from an useless (here in Italy) power supply with UK plug.
I did new holes for 3.5 jack and usb.
I've also added a blue led light and four rubber feet.

http://recyclingaudio.blogspot.com/
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Last edited by Calamaro; 19th February 2012 at 02:38 PM.
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Old 19th February 2012, 03:38 PM   #2
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Scarry view of those 230-240V prongs sticking out from your DAC
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Old 19th February 2012, 03:41 PM   #3
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Quote:
Originally Posted by SoNic_real_one View Post
Scarry view of those 230-240V prongs sticking out from your DAC
Oh yes I know but don't panic, we have no holes for that plug here in Italy
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Old 19th February 2012, 03:46 PM   #4
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Yeah, I know. But I would just cut them flush, to make it more compact that way.
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Old 20th February 2012, 04:39 AM   #5
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The "enclosure" looks like a nice fit. How does it sound? I'm currently waiting on boards for a ver similar PCM2706 design.
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Old 22nd February 2012, 06:24 AM   #6
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Woah, you got me interested in this one
I need a cheap replacement for onboard audio so how does it sound?
Thanks
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Old 22nd February 2012, 07:39 AM   #7
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Redshift187, Skiivari, it sounds not bad at all. Anyway I can't hear huge differences from my plain Mac Mini output.
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Old 24th February 2012, 06:27 PM   #8
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Hi,

I'm interested in such designs, I'm looking forward to an USB dac able to drive my earphones to listen at work (that onboard soundcard is not very good) .

Do you think this board can drive a 32 ohm headphone ? Or I will need to add an opamp to give it more juice ?

Thank you !

Thank you
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Old 24th February 2012, 10:28 PM   #9
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According to the spec sheet of the pcm270x series chips, it can drive 32 ohm headphones.
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Old 25th February 2012, 07:45 AM   #10
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Quote:
Originally Posted by Redshift187 View Post
According to the spec sheet of the pcm270x series chips, it can drive 32 ohm headphones.
Thanks I've missed the chip ref to google it for datasheet !

Ordered one this morning eBay | MINI PCM2704 HI-FI USB DAC DIGITAL BOARD SOUND CARD-XD , hope it will works great
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