Ampdog
R.I.P. 23 June 2022
I found the below little circuit and am impressed by the simplicity, while probably yielding as little/inaudible extra products as one can wish for. Some discussion on it is interesting. (The better drawing is in post #4 by Juma).
www.diyaudio.com/forums/solid-state/193923-simple-symetrical-amplifier.html
www.diyaudio.com/forums/solid-state/193923-simple-symetrical-amplifier.html