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-   -   MayDus, PCM2706/CS4398 USB DAC w Transformer output. (http://www.diyaudio.com/forums/digital-source/210834-maydus-pcm2706-cs4398-usb-dac-w-transformer-output.html)

Mayday 15th April 2012 10:25 PM

MayDus, PCM2706/CS4398 USB DAC w Transformer output.
 
I've ordered a pcm2706/cs4398 based usb dac pcb.
I went with a tube output on the MayDac(TDA1541A), and with this one I'll use edcor transformers between cs4398 and RCA-out.
I would like to use Jensen or Lundahl, but I can't afford them.
Thanks Dave, for pointing me to the edcor transformers.

I was planning on using 600:600 XSM, but was steared towards 10K:10K by some friends on another forum. Any thoughts?
Do I need the XSM 10K:10K or will a WSM 10K:10k do?
Any difference in SQ between the two?

Edcor XSM 10K:10K
Edcor WSM 10K:10K

DAC
http://i1260.photobucket.com/albums/.../MayDus/20.jpg
http://i1260.photobucket.com/albums/.../MayDus/19.jpg
http://i1260.photobucket.com/albums/.../MayDus/18.jpg
http://i1260.photobucket.com/albums/.../MayDus/16.jpg

I'm choosing between this box for it(plastic)
http://i1260.photobucket.com/albums/...yDus_box_1.jpg

or one similar to my B1 preamp-build, but smaller.
http://i1260.photobucket.com/albums/...2/DSC01322.jpg
http://i1260.photobucket.com/albums/...backside_2.jpg
http://i1260.photobucket.com/albums/...2/DSC01295.jpg

The metallbox will be more expensive, plus the plastic one is on it's way.
But will a plastic box do the trick, thinking about grounding etc?

Mayday 16th April 2012 11:23 AM

Has anyone here done a transformer output for CS4398?
Any advice is appreciated :)

Mayday 16th April 2012 05:57 PM

I'll order the Edcor XSM 10K/10K and upgrade to a Lundahl LL1540 later if I really like how it sounds.

Mayday 18th April 2012 10:13 AM

Got the plastic box today, here it is in comparison to my iphone4(in need of cleaning).

http://i1260.photobucket.com/albums/...s/DSC01383.jpg
http://i1260.photobucket.com/albums/...s/DSC01382.jpg
http://i1260.photobucket.com/albums/...s/DSC01381.jpg

Mayday 19th April 2012 10:13 AM

Two Edcor XSM 10K/10K ordered :)

TheGimp 19th April 2012 12:24 PM

I've used the XSM 10K/10K as isolation transformers in a soundcard based audio test system and was quite happy with them.

You need to try to keep your load impedance near 10K and they should work well. The 600/600 would not work well in this application as the impedance is too low for the DAC output to drive if the transformer were properly loaded.

Mayday 19th April 2012 12:38 PM

Quote:

Originally Posted by TheGimp (Post 2991867)
I've used the XSM 10K/10K as isolation transformers in a soundcard based audio test system and was quite happy with them.

You need to try to keep your load impedance near 10K and they should work well. The 600/600 would not work well in this application as the impedance is too low for the DAC output to drive if the transformer were properly loaded.

Thanks :)
Hope I'll be happy with them as well.
They'll drive a Lehmann BCL clone headphone amplifier. Not really sure what input impedance it has though.

Mayday 19th April 2012 03:21 PM

Anyone who has a rough estimate about edcor's delivery times to europe?

Mayday 19th April 2012 04:31 PM

I was told about 14 days by another Swede, not too long :)

Mayday 20th April 2012 09:22 PM

Just checked edcors site, my xsm's are shipped :)


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