I have experimented with different bias currents in my Class A/B Integrated Amp and found that higher values provided significant improvements in sound quality, especially at low volume. Heat buildup becomes a limiting factor.
The "Leaving Class A" article by Nelson Pass may be of interest.
https://www.passlabs.com/technical_article/leaving-class-a/
The "Leaving Class A" article by Nelson Pass may be of interest.
https://www.passlabs.com/technical_article/leaving-class-a/