Quite, but (if I am looking at the schematic that you are referring to) - you will know that the SSM2210 and LM394 dual transistor parts are now both obsolete and increasingly hard to find.
Well, the OPA627 design is over 17 years old and was perhaps never really designed for audio use? But it could possibly have been one of the stepping stones for BB towards their SoundPlus opamp series?
Anyway, I've never used it. Maybe someone else on this thread has more knowledge to share?
have used very old for telecom application relative slow opamps for audio some time ago with nice results/measurments..
I think there was an opamp shootout thread somewhere and the brand made a difference. Specifically, JRC was better from (measured) low noise standpoint as I recall.
The specs (typical) from data sheets are practically identical. The block diagrams also. (the TI 5532s). But there are always variations in semis. That's why most parameters have typical and min/max values. What yours actually are is a crap shoot. So if one batch has close to max noise and the other is below typical there's a difference. The next 2 batches from those manufacturers may be the other way around. And then there's always counterfeits. But I'm also skeptical that you would here a difference anyway.
Edit. Some of these variations are huge. Input resistance 30 to 300k, CMRR 70 to 100 db!
Edit actual could be bigger because the 100db is the typical value. 70 is min what's max 110db ?
Edit. Some of these variations are huge. Input resistance 30 to 300k, CMRR 70 to 100 db!
Edit actual could be bigger because the 100db is the typical value. 70 is min what's max 110db ?
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