By the way, something has happened, maybe the burn-in phase went to finale.
I mean, you all must know that the amp sounds way better in source direct mode than in stereo mode. This is due the fact that in stereo mode the signal goes through the internal DSP which affects the signals quality.
Things have changed; I can't tell the difference between those modes almost at all anymore. Since one hour ago, or then I noticed it.
I have never used Audyssey eq settings or m-dax but briefly tried them so this can not be because of this.
From the beginning and even two days ago I allways noticed clear performance improvement in highs when swapping the source direct mode, but not anymore. I just tested this on both my passive main speakers and active monitors, and with analog input and digital input source; the difference has almost totally vanished! The stereo mode's (= sound that has been edited in the DSP) sound have improved like hell!
I tried to put the speakers to Small mode, because this definitely activates the high-pass filter and also the DSP. I tested again; no difference.
I also changed the Speaker C switch at the back to "off", and tried again. Again, no difference. (But I absolutely suggest that you keep Spekser C setting at "on" if you use 5.1 or fewer speakers system. it maybe channels the amplifier's power automaticly differently because it knows that there are no surround back or front height speakers, who knows.)
I changed the amp's setting couple of days ago, so I figured that this improved stereo mode could be due these changes. Couple of days ago I changed the speaker levels so that I raised them all to nearer/more near to +0 db (They were between -9 and -7,5 db before, now they are between -3 and -1,5 db) I left them slighlty under +0 db because some audyssey's corrections are +3 and cople are +4, so that the line levels would stay near zero. Don't raise the main level above +4db, you have to drop the speaker level if you boost some frequency more than +4db. You get what I mean. Again I don't use audysseu but only sometimes, but I still keep these setting below the + 0 for the situations were I apply to use audysseu.
So, I dropped the levels equally back to where they were, between -9db and -7,5db. Again, no difference. The good sound of the stereo mode persisted!
I can't get the old worse stereo mode sound out anymore, no matter what I do. The stereo mode sounds 99 % as good as source direct mode. Couple of days ago this difference was huge in every aspect of sound. Instantly after swapping from stereo mode to source direct, I could tell that highs were clear as sky and bass was tight and controlled. I even ordered high level input cable to my subwoofer because I wanted to be able to play it in source direct mode because it sounded so fantastic that I cound not return to stereo mode listening. So I thought.
Now the amp sounds almost the same in both the source direct and stereo mode. Stereo mode's improvement is dramatic. Analog input source has slightly bigger difference than digital input, but the difference between the modes is almost non-existent in both.
I can't explain this but with the fact that the internal DSP has broken in or something. If somebody knows that this is due the some setting, please tell. In any case, this is most delightful news.