MayDus, PCM2706/CS4398 USB DAC w Transformer output.

Mayday · 11:18 PM

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

I'm choosing between this box for it(plastic)

or one similar to my B1 preamp-build, but smaller.

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).

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

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

15th April 2012, 10:25 PM	#1
Mayday diyAudio Member Join Date: Mar 2004 Location: Sweden	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 I'm choosing between this box for it(plastic) or one similar to my B1 preamp-build, but smaller. 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? __________________ The more you learn, the more you realize how little you know... Mayday DIY blogg Last edited by Mayday; 15th April 2012 at 11:18 PM.

16th April 2012, 11:23 AM	#2
Mayday diyAudio Member Join Date: Mar 2004 Location: Sweden	Has anyone here done a transformer output for CS4398? Any advice is appreciated __________________ The more you learn, the more you realize how little you know... Mayday DIY blogg

16th April 2012, 05:57 PM	#3
Mayday diyAudio Member Join Date: Mar 2004 Location: Sweden	I'll order the Edcor XSM 10K/10K and upgrade to a Lundahl LL1540 later if I really like how it sounds. __________________ The more you learn, the more you realize how little you know... Mayday DIY blogg

18th April 2012, 10:13 AM	#4
Mayday diyAudio Member Join Date: Mar 2004 Location: Sweden	Got the plastic box today, here it is in comparison to my iphone4(in need of cleaning). __________________ The more you learn, the more you realize how little you know... Mayday DIY blogg

19th April 2012, 10:13 AM	#5
Mayday diyAudio Member Join Date: Mar 2004 Location: Sweden	Two Edcor XSM 10K/10K ordered __________________ The more you learn, the more you realize how little you know... Mayday DIY blogg


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19th April 2012, 12:24 PM	#6
TheGimp diyAudio Member Join Date: Aug 2009 Location: Johnson City, TN	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.

19th April 2012, 03:21 PM	#8
Mayday diyAudio Member Join Date: Mar 2004 Location: Sweden	Anyone who has a rough estimate about edcor's delivery times to europe? __________________ The more you learn, the more you realize how little you know... Mayday DIY blogg

19th April 2012, 04:31 PM	#9
Mayday diyAudio Member Join Date: Mar 2004 Location: Sweden	I was told about 14 days by another Swede, not too long __________________ The more you learn, the more you realize how little you know... Mayday DIY blogg

20th April 2012, 09:22 PM	#10
Mayday diyAudio Member Join Date: Mar 2004 Location: Sweden	Just checked edcors site, my xsm's are shipped __________________ The more you learn, the more you realize how little you know... Mayday DIY blogg

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