Calvin, to clarify your question I attached the board photo were you can clearly see the emitter of the C4793 connecting to the collector of the 0302G and on the negative side the same. ThanksI´d like to repeat again to please clear up if the emitter connections of Q11 and Q13 are really going to the out node or the collector nodes of Q14/15 and Q16/17.
Attachments
This is how it is working now, the drivers are colder with the 100R resitors, unfortunately it does not sound as clear as the previous version. It looks that the cascode input stage on the Version 4 works better. I dont have any equipment to make further measurements.