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Originally Posted by Vladco  Another question about I/V stage. Did you test THS4032?
Also I don’t have balanced gear yet so which parts should I use or could omit on IVY?
Did you hear any difference in sound with different chips and voltages? Which ones you tests successfully and which doesn’t work good enough in IVY.
Also could you provide a little insight in digital volume control? How good attenuation it could provide and what is workable range of attenuation: 1 –100%, or 50-100% (like SB)? Do we need to get extra parts or every thing is provided in dac kit?
Of cause it will be yours subjective opinion.
You answers will be appreciated.
Vlad
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Hello,
You would want to use all the parts on IVY.
The THS4032 is a solid choice. I have used it, it is quite good.
I don't really have a list of opamps not to try. Almost any decent dual opamp will work fine. I would actually tend to prefer good bipolar input types to FET input types. That may just be a personal bias. That said I do like the newer JFET devices from TI, and I would never say the AD8620 is bad.
I setup my volume control so that the minimum volume was at 50% attenuation (63.5db). This so that I had more pot travel to play with. I have no interest in listening to music at - 70db
Still the very best performance I personally have heard so far out of the IVY has been out of the LME49720/LM4562. It simply is very well suited to the task. yet there is no denying there exists a wide range of op amps which would work, and you may prefer a part I have not even tried yet.
Cheers!
Russ
