Thanks for the analysis, Trevor. I can't mirror the fireplace because the stairs going up are on the right where you've placed the false corner. To equally load the room and get a proper soundstage and imaging, I've had to place the LFRs at unequal distances from the side walls. I've had to do that with every speaker actually. The actives are amazing because they acoustically disappear with anything thrown at them.

The experiments with the subs continue until my back or something else like nads or sphincter gives out. laugh

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated