Didn't your mother teach you that if you do not have anything "nice" to say, then to say nothing at all?
We all know your opinion of the GFA-555 amp...
QUOTE]
I ve no opinion..it s my simulator that express one..
As for saying things nices, what is the purpose of such
things in a technical forum ?.....
Should i say that despite being well manufactured ,
the amp doesn t reach a basic audiophile expectations?..
Yes, you have a superb amp....does it suit you this way ?..
As many people have said previously, simulation software is great for development, but it rarely tells the whole story. My tube amps probably would send simulation software into a "worm hole" and lock-up your computer, but they still sound good to me.
PB2 - As an experiment, I purposely replaced the diff. input pair on the GFA-555 with an "unmatched" pair, in an attempt to reduce DC-Offset and it did reduce the off-set. I also installed a 33 ohm emitter resistor on the inverting input leg, so degeneration would be somewhat similar.
If the diff. input pair did not have the THD circuit (Yellow LED on front panel) in the inverting collector circuit, it would be easier to get more balance, and hence a lower offset.