Yeah, the OPA2107 is appealing in some ways, but compared to the better modern opamps it's just mediocre. The OPA1642 should work fine...it's worth supplying the adapters 🙂
I know quite a few op-amps 😉
Have been working in audio R&D some years!
I know that op-amps sounds different. But still, you always know the sound of an op-amp.
I know to many people, who has been upgrading their gear with new op-amps, and been happy about... Just until they tried to put back the NE5532 in 😀
And yes, I know it hasn't got the best specs in the world. But it has a very raw sonic performance No extra glance, extra softness and so on. What you put in, you will get out.
But if you realy do search the ultimate sonic performance, you should cinsider a discrete design, instead of the easy op-amp solution.
I'm looking for a high standard at a low price. 😉
That said, have you tried the last generation of audio opamps at all? 😀
Actually... Yes I have. National Semi, Analog Devices, TI (Burr-Brown) and so on.
Best sonic result yet, is NE5532/NE5534. Second place must be MC33078.
I do understand why people tend to use new ultra high spec op-amps. In theory it would be better.
But thoose who actually do perform "blind test", will NOT pick these "racing op-amps".
You should try forgetting about the datasheet, and use your ears 😱
Then try a well designed fully discrete design, and a whole new world will open!
Op-amps is a easy and fail safe solution for Low End applications.
Thare are many very high end audio products that use them...and not even the very best. Being an extremist doesn't make you more enlightened, you know. 😉
That said...tried, for instance, the OPA1611 ? Please 🙂
"they aren't always used correctly in a given application"
Surely... but sometimes they are, you know. 🙂
BTW, saying that "there's no such thing as a good sounding opamp" is beyond pathetic.
Surely... but sometimes they are, you know. 🙂
BTW, saying that "there's no such thing as a good sounding opamp" is beyond pathetic.
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opa1611 is good.
I don't like the sound of opa1642.
how about the sound of opa1612?
I don't have it yet, it is cheaper than using 2 opa1611.
I don't like the sound of opa1642.
how about the sound of opa1612?
I don't have it yet, it is cheaper than using 2 opa1611.
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I think it must be almost as good.
I compared the OPA2211 and the OPA211 (both "A", meaning not the higher grade of the single OPA211), and they sounded nearly identical. I think it's much preferable to use an OPA1612, than to use two OPA211AID. Don't know the OPA211ID, which I haven't tried even though I have them.
If it is stable in the application, I'd also prefer to use the LT1028ACN8 to the OPA2211/OPA211.
I don't know how to describe it, and I would like to see how you judge it.
May be I am too use to the sound of OPA1611 now 🙂🙂🙂
Ah, well, that alone is a good reason. 🙂🙂🙂 I guess the FET input OPA1641/1642 will sound grainier and less transparent compared to it.
I can assure you, that there are NO op-amps in the signal path in my audio gear! Also, there is ZERO feedback!
Everything is based on discrete circuits with no negative feedback.
I have been listening a lot to different op-amps, and made a few "blind tests". These have ALL ended up, with the "blind listener" pointing out NE5534/NE5532 as the best. But when you show the same people the datasheets, the don't like these 2 op-amps. So I guess it's a matter of choosing from sonic performance by listening test or choosing from datasheet specifications 😀
When we have made listening tests with our discrete analog stage, every single listener has picked this over any of the op-amps we have tried (And we did try quite a few).
What opamp are we listening to today Andrea ?
It would be really interesting, for you to have a test circuit (all of your choice) and for you to be sent a load of devices, all with the type numbers sanded off and just numbered perhaps with dots etc and see what you came up with results wise 🙂
If my Micromega wasn't so difficult to unsolder the devices on (plated through vias, you have to cut the legs and clear each hole with steel wire) I would try for curiosity some of the later devices. Having said that though... everytime I listen (really listen) I know how "right" it sounds. It's 16 years old now lol.
It would be really interesting, for you to have a test circuit (all of your choice) and for you to be sent a load of devices, all with the type numbers sanded off and just numbered perhaps with dots etc and see what you came up with results wise 🙂
If my Micromega wasn't so difficult to unsolder the devices on (plated through vias, you have to cut the legs and clear each hole with steel wire) I would try for curiosity some of the later devices. Having said that though... everytime I listen (really listen) I know how "right" it sounds. It's 16 years old now lol.
I think you would be astonished. I would hear their sonic colors, and by that means would recognize most of them 🙂
Funny thing about thoose "Op-Amp-Tweaking" entusiasts... They always search the datasheets for the best op-amp. Then they swap, and tell you that the new one is SO much better! The day after, they will start looking for a new one 😕
And every time they change, they will tell you how much better it sounds... 10 yearsand a hundred op-amps later, many of them will pick the good old NE5534 in a blind test, as the best sonic performer 😀 Yeap... I did that test with a friend of mine a couple of years ago.
Why don't you put some effort into building a good discrete/non-feedback analog stage?? The op-amp approach is the easy and fail safe way towards a low end solution. Discrete design is the hard way, but it can take you to real high end. Op-amps will not, even at -140dB THD!
And every time they change, they will tell you how much better it sounds... 10 yearsand a hundred op-amps later, many of them will pick the good old NE5534 in a blind test, as the best sonic performer 😀 Yeap... I did that test with a friend of mine a couple of years ago.
Why don't you put some effort into building a good discrete/non-feedback analog stage?? The op-amp approach is the easy and fail safe way towards a low end solution. Discrete design is the hard way, but it can take you to real high end. Op-amps will not, even at -140dB THD!