Sidssp,
I am aware of all the tech reasons you're referring to. In my room I can't place the sub in the middle because there's a large aquarium smack in between the speakers (has been for the last 35 years in a number of homes). With a single sub on the left or right I didn't necessarily hear the sub but with stereo subs I DO hear a broader and deeper soundstage particularly with classical music. I "know" the rules but I "experience" the effect of stereo subs-it sounds wonderful.
I am aware of all the tech reasons you're referring to. In my room I can't place the sub in the middle because there's a large aquarium smack in between the speakers (has been for the last 35 years in a number of homes). With a single sub on the left or right I didn't necessarily hear the sub but with stereo subs I DO hear a broader and deeper soundstage particularly with classical music. I "know" the rules but I "experience" the effect of stereo subs-it sounds wonderful.