please clarify how my scenario is different from pg 59 of the manual
page 59 illustrates the Denon "2-ch" mode, which allows for you to have a full multichannel speaker setup and then have a SEPARATE pair of "B" front speakers which you switch to for dedicated 2-ch listening. They are NOT "wide" speakers, they are an alternate pair of FRONT speakers.
Denon chose to illustrate them right next to the "A" front speakers, but they are absolutely not the "wide" speakers in a DSX setup, they could just as easily be in another room. Notice how they are labeled FL / FL' and FR / FR' in the diagram.
The point of this feature is to allow you to easily alternate between two different speaker setups, one multichannel, one 2-channel. For example, somebody might have a sub / sat 7.1 speaker setup in the living room, but they still have a big pair of old tower speakers that they love for 2-ch music in the den. This mode allows you to switch between your two setups (multich versus the separate 2-ch rig) automatically depending on the surround mode.
However, it requires that you devote one set of the "beyond 5.1" speaker terminals (height, wide, or surr.back) to the "alternate" front speakers, meaning you max out at 9.x for your multichannel setup.
In order to run an 11.x setup, you set AMP ASSIGN to "11ch", but this is mutually exclusive with the configuration on pg 59. Switching from "11ch" mode to a situation where the "wide" speakers are playing 2-ch stereo would require you delving deep into the menus and reconfiguring your amp assign / speaker settings every time you wanted to switch.
So, if you were willing to run a 9-ch setup, and sacrifice one of the surr.back / height / wide speakers, then you could do as you intend. But it still would not be "toggling" the wide speakers with FL/FR for stereo. The two dedicated "2-ch" speakers would be silent during any multichannel use, and would only activate (with all the other speakers going silent) when you switch to "STEREO / DIRECT" mode for 2-ch listening.
Does that make more sense?
Originally Posted by jbpaul
the floor speakers would be movable enough that it would work from where she listens
I'm not sure if you literally mean you will physically move the speakers when your wife wants to listen to 2-ch, but, ideally, you don't want to be moving speakers around once they are configured / calibrated. The Audyssey MultEQ corrects for your room acoustics and moving speakers while change that equation.