FC amp, there is any method to reduce H3?

[roender]

What do you think about this input stage?
It is my new amplifier and this stage will be coupled with classA_25W/classB_100W triple darlington output stage with 5 peers of Onsemy 0302/0281 power BJTs
The NFB gain will not be more than 40dB.
What can I improve in this stage to reduce H3?

Mihai

 

[padamiecki]

pp input stage?

 

[roender]

Yes, only one stage, folded cascode!

 

[aparatusonitus]

Why don't you try AD797 topology, folded cascode + diamond buffer = one gain stage as well. See my findings below for inspiration...
http://www.diyaudio.com/forums/showthread.php?postid=1227374#post1227374