AUNE T1 24 BIT Valve (Tube) DAC on it's way!

freddypipsqueek Been here a while! Posts: 534	AUNE T1 24 BIT Valve (Tube) DAC on it's way! Jun 5, 2019 21:03:16 GMT Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by freddypipsqueek on Jun 5, 2019 21:03:16 GMT Shame the V5i didn't work - not because I would say it would be better just for comparison. Thanks for posting this. Particularly with some objective comments.
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coil
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Posts: 65

AUNE T1 24 BIT Valve (Tube) DAC on it's way! Jun 14, 2019 18:17:04 GMT

Quote

Post by coil on Jun 14, 2019 18:17:04 GMT

Jun 5, 2019 21:03:16 GMT freddypipsqueek said:

Shame the V5i didn't work - not because I would say it would be better just for comparison.

Thanks for posting this. Particularly with some objective comments.

OH! Thanks for reminding V5i-D as I just got DAC differential opamp(OPA2134 in stock) roll-able socket installed and currently testing
OPA1692 + OPA2228 vs. LM4562 + OPA2228.
Will try out V5i-D too in there + OPA2228 (though, as much as I know, V5i-D is said to be better for output stage).
Atm I decided to stay with OPA2228 as HO opamp but maybe some other combination will also do wonders, will have to test more.

Anyway...

OPA1692+OPA2228 vs. LM4562+OPA2228 - I think both combinations sound very good by initial impressions but 1st combination sounds more "flowing" and natural with same amount of details. It sounds slightly more open&airy.
Second setup seems to have maybe slightly tighter and more "focused" imaging with instruments more focused and separated from background effects. Idk, it`s hard to explain.

LM4562+OPA2228 sounds actually very good and "intense" but it gets very hot, so, can`t recommend it atm and will have to look into cause of heating problem.

Last Edit: Jun 14, 2019 18:18:20 GMT by coil

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PinkFloyd Rock Grotto (admin) Born again Caveman Posts: 23,095	AUNE T1 24 BIT Valve (Tube) DAC on it's way! Jun 14, 2019 21:33:49 GMT Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by PinkFloyd on Jun 14, 2019 21:33:49 GMT LM4562+OPA2228 sounds actually very good and "intense" but it gets very hot, so, can`t recommend it atm and will have to look into cause of heating problem. Oscillation.... check it out
	Last Edit: Jun 14, 2019 21:35:31 GMT by PinkFloyd ‹(•¿•)› <(•?•)› amplifier tweaks at www.rock-grotto.co.uk/xcanpropage.htm A society grows great when old men, and women, plant trees whose shade they know they shall never sit in.

coil
<100

Posts: 65

AUNE T1 24 BIT Valve (Tube) DAC on it's way! Jun 15, 2019 6:43:43 GMT

Quote

Post by coil on Jun 15, 2019 6:43:43 GMT

Jun 14, 2019 21:33:49 GMT PinkFloyd said:

LM4562+OPA2228 sounds actually very good and "intense" but it gets very hot, so, can`t recommend it atm and will have to look into cause of heating problem.

Oscillation.... check it out

Yeah, that what I was suspecting as soldering seems ok and one H-fier say that this "intense" sound may come from opamp running in "calss-A" with oscillation in mHz range. I think I won`t start to mess with "stabilizing" it as I currently find OPA1692IDR + OPA2228PA very good combo

Will get new OPA2134UA chip also to compare to stock sound and do more proper&detailed comparison.

Anyway, those who have T1 laying around without use and like tinkering, I recommend to try this out

Last Edit: Jun 15, 2019 7:09:28 GMT by coil

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AUNE T1 24 BIT Valve (Tube) DAC on it's way!

Post by freddypipsqueek on Jun 5, 2019 21:03:16 GMT

Post by coil on Jun 14, 2019 18:17:04 GMT

Post by PinkFloyd on Jun 14, 2019 21:33:49 GMT

Post by coil on Jun 15, 2019 6:43:43 GMT

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