I thought adding another amplifier would add more channels? Is that not the case? Here is a picture of the back of my receiver:
View attachment 47053
So, by plugging in the 2nd amp to the pre out of say the surround back, would that not re route the audio signal through the 2nd amp, allowing me to then also use the Front Atmos as well as the rear surround speakers, creating a 7 (L/C/R, Front Surround, Rear Surround) .2 (Subwoofers) .4 (Front and Rear Atmos/Presence)? Or would the 2nd amp not matter? Is my receiver limited to the 9.2 channels no matter how I run it? IE 7.2.2, 5.2.4