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How to get the best out from a (or 2) TPA6120A2
How to get the best out from a (or 2) TPA6120A2
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Old 3rd November 2020, 05:05 PM   #11
DontHertzMe is offline DontHertzMe  South Africa
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Quote:
Originally Posted by Andersonix View Post
Your projects are works of art, Donthertzme!

Thank you kindly


I have a board for the THS6012 that's been staring at me for a few weeks now.
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Old 5th December 2020, 09:11 PM   #12
Giordano is offline Giordano  Hungary
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I am listening to a balanced version for a few weeks now and I can say I'm impressed. The source is a cheap Chinese DAC, which is not bad, but I think my AD1865 based DAC is still better. Anyway, after some experiment on the bench, I built it on a piece of wood and listening for it. I think it is either the "superreg" PSUs, which are really good (too bad that I ignored them for years) or the balanced config.
It has a natural, wide soundstage, no problem with top and bottom and the main thing is, while it is detailed, does not make me tired. It is for sure in the direction to a triode SE OTL I built on my firend's design. It is not the same at all, can not really tell which is better, but I feel this is my first solid state headphone amp what I like.
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Old 5th December 2020, 10:58 PM   #13
kn0ppers is offline kn0ppers  Germany
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Did you put the TPA6120A2s directly after the 10k potentiometer?
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Old 6th December 2020, 05:03 PM   #14
Giordano is offline Giordano  Hungary
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yes,
JG
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Old 6th December 2020, 05:28 PM   #15
kn0ppers is offline kn0ppers  Germany
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TPA6120A2 has relatively high input bias currents and current noise figures. I don't think the TPA6120A2 datasheet even mentions those figures, but the THS6012 datasheet sure does.
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Old 6th December 2020, 07:04 PM   #16
Giordano is offline Giordano  Hungary
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around 10uA, but that is not a problem in this circuit. It is good to keep in mind because I have a DAC where the signal is coupled out with cap. I do not intent to mix. So, I will use the tube output DAC with tube amp.
This one is made to be portable. I mean, room to room, not on the street :-)
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Old 8th May 2021, 11:09 PM   #17
Giordano is offline Giordano  Hungary
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Hello,
I have tried to build a DAC+headphone amp from a Chinese DAC pcb, 4 superreg PSU and a balanced TPA6120 amp. The DAC is bad. But, the headphone amp paired with the superregs became a great success. I really enjoy it. Detailing, but not harsh. Pairs well with my sennheisers.
I'm desigining a more compact version, I include the status here, if you guys have time to review it and has comments, I appreciate that.
Thanks,
JG
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Old 8th May 2021, 11:12 PM   #18
Giordano is offline Giordano  Hungary
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let me try again the attachmentTPA6120bal.pdf
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Old 9th May 2021, 10:22 PM   #19
Giordano is offline Giordano  Hungary
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progressingTPA6120bal.pdf
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Old 19th May 2021, 08:56 PM   #20
Giordano is offline Giordano  Hungary
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The PCB arrived, the components tomorrow.
JGIMG_5821.jpeg
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