Hifimediy DAA1853 DAC - AD1853/CS8416/OPA2134 - Page 3 - diyAudio
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Old 7th July 2011, 11:00 PM   #21
zog666 is offline zog666  Australia
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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?
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Old 8th July 2011, 01:42 AM   #22
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Hi, we will use OPA134 next.
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Old 12th July 2011, 02:02 PM   #23
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Is it going to be back in stock soon?
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Old 15th July 2011, 01:22 AM   #24
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yes, already
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Old 19th July 2011, 01:27 PM   #25
zog666 is offline zog666  Australia
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Quote:
Originally Posted by hifimediy View Post
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.
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Old 20th July 2011, 11:13 AM   #26
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There will be also less DC offset when OPA134 used. Always less than 10mV under my test.
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Old 16th August 2011, 11:25 AM   #27
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Default 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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Old 27th August 2011, 02:54 PM   #28
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Can owners of this DAC make a comparison with other DACs even more expensive?
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Old 27th August 2011, 03:02 PM   #29
zog666 is offline zog666  Australia
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Originally Posted by Centvrion View Post
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.
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Old 27th August 2011, 06:34 PM   #30
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Quote:
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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!
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