Hifimediy DAA1853 DAC - AD1853/CS8416/OPA2134 - Page 3

zog666 · 7th July 2011, 11:00 PM

The obvious cheap and easy upgrade to try on this unit would be replacing the (socketed) ne5534 opamps with something else.. any ideas on a good drop in replacement?

hifimediy · 8th July 2011, 01:42 AM

Hi, we will use OPA134 next.

tamphist · 12th July 2011, 02:02 PM

Is it going to be back in stock soon?

hifimediy · 15th July 2011, 01:22 AM

yes, already

zog666 · 19th July 2011, 01:27 PM

Quote:

Originally Posted by hifimediy

Hi, we will use OPA134 next.

I just got some OPA134 chips from ebay and put them in, sounding good so far! A drop in replacement.

hifimediy · 20th July 2011, 11:13 AM

There will be also less DC offset when OPA134 used. Always less than 10mV under my test.

tamphist · 11:27 AM

I added 10uf tantalum bypass cap to LM317 adjustment pin for better ripple rejection,
as recommended in LM317 datasheet:
http://www.acoustica.org.uk/t/images/317-2.gif

Also added 0.1 uf MKP bypass caps to power supply capacitors and replaced OPA2134 with LT1469 and OPA134 with OPA627. I didn't listen to the stock
version, but this sounds very good

Centvrion · 27th August 2011, 02:54 PM

Can owners of this DAC make a comparison with other DACs even more expensive?

zog666 · 27th August 2011, 03:02 PM

Quote:

Originally Posted by Centvrion

Can owners of this DAC make a comparison with other DACs even more expensive?

Not I, everything else I have available is cheaper! I would be curious to know how it stands up though, as well.

Centvrion · 27th August 2011, 06:34 PM

Quote:

Originally Posted by zog666

Not I, everything else I have available is cheaper! I would be curious to know how it stands up though, as well.

You are right! But after TA2020 nothing amazes me no more!

7th July 2011, 11:00 PM	#21
zog666 diyAudio Member Join Date: May 2009	The obvious cheap and easy upgrade to try on this unit would be replacing the (socketed) ne5534 opamps with something else.. any ideas on a good drop in replacement? __________________ audio project blog http://www.minirig.org.au/

16th August 2011, 11:25 AM	#27
tamphist diyAudio Member Join Date: Dec 2010	mods I added 10uf tantalum bypass cap to LM317 adjustment pin for better ripple rejection, as recommended in LM317 datasheet: http://www.acoustica.org.uk/t/images/317-2.gif Also added 0.1 uf MKP bypass caps to power supply capacitors and replaced OPA2134 with LT1469 and OPA134 with OPA627. I didn't listen to the stock version, but this sounds very good Last edited by tamphist; 16th August 2011 at 11:27 AM.

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8th July 2011, 01:42 AM	#22
hifimediy diyAudio Member Join Date: Oct 2009	Hi, we will use OPA134 next.

12th July 2011, 02:02 PM	#23
tamphist diyAudio Member Join Date: Dec 2010	Is it going to be back in stock soon?

15th July 2011, 01:22 AM	#24
hifimediy diyAudio Member Join Date: Oct 2009	yes, already

20th July 2011, 11:13 AM	#26
hifimediy diyAudio Member Join Date: Oct 2009	There will be also less DC offset when OPA134 used. Always less than 10mV under my test.

27th August 2011, 02:54 PM	#28
Centvrion diyAudio Member Join Date: Jan 2011 Location: Province of Bergamo	Can owners of this DAC make a comparison with other DACs even more expensive?