Sony CX20197

Hi everyone!
I am looking for some info on the above Sony IC-s. Unfortunately tehere is close to nothing can be found on the web. All I know, is that it is a dual opamp, with +/-15 supply voltage, GBW: 40 MHz, SR: 20V/uS ratings. The reason: It sounds damn good... :hphones: In a DAC output stage it "overperformed" almost every modern, well respected dual opamps I've tried as far as speed, dynamics, and liveliness is concerned.. (in my system, of course 😉) Sony used these in some better CD players, and audio processors in the 80's.
If anyone has some more info or experience with these, please share with us....
 

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