"Watson A.Name - "Watt Sun, the Dark Remover""
wrote in message

Opinions on this, especially the 2.5W amp schem at the bottom.
http://www.intio.or.jp/jf10zl/EF.htm

When the amp is idle, and there's no(?) current flowing in either
output transistor because there's no forward bias, then the V drop
'resistance' of the E-B junction adds to the 100k feedback resistor,
so the loop gain increases to the open loop gain. So it would seem
that the amp would attempt to hunt in this region, possibly
oscillating?

Depends on the op amp. I stopped taking this circuit page seriously when I
saw "741" on the upper two circuit diagrams.

Do you know what a 741 is from the standpoint of quality audio? Anathema!

Maybe a 1k resistor E to B on the output transistors would 'bypass'
this. Or should the amp be biased to work class AB.

It's a variation on what some designers call "current dumping".

However let's say the truth - this is an outdated, amateurish design with no
known merits over established technology.