Choosing a Feedback error amplifier

[Bigun]

looks like some pre-distortion going on in this circuit to improve linearity of the 'LTP' ??

 

[padamiecki]

Hi Bigun
most of error corrected amps are using gnfb but a few not, for example: http://electronicdesign.com/site-fi...ctronicdesign.com/Content/14978/60028_fig.gif
and derivate: http://www.diyaudio.com/forums/solid-state/221309-my-little-posh-tringlophone.html#post3196685