Piercarlo said:
The theory of "last minute strange compromises" may be a good one. My elucubrations was made in the hipothesis of a quiet, savvy revision of the design. If you are right... then I may only discourage any buying of amplifiers (as of any others equipments) from this firm. First of all because a "last minute strange compromise" as this, plainly reported on schematics, don't allow further trusting on team design ability to cope safely with circuital problems!. An inspection of fisical construction for detecting "last minute" PHYSICAL correction is recommended!
Happy Xmas... despite of "last minute" odds!
Piercarlo
Well like I said in post 13, It's probably just a drafting error. Since this has now been confirmed, that's the end of the theorising
.Just one thing in defence of my theorising; I’ve seen a few apparently nonsensical component value selections made to fix stability issues - Think of a complementary Darlington emitter follower, biased heavily into class A to give low-impedance drive to a (intended) high speed Class AB MOSFET output stage, but with 910R individual grid stopper resistors for the MOSFETS. Or a secondary differential amplifier added to increase open loop gain, but emitter degenerated to a gain of approximately unity………