Can someone please explain to me electronically and acoustically what the difference is in the speaker size setting on my Denon AVR-X1700H? I’ve read regardless to keep it set to small. I just replaced my Bose 301s with SVS Prime towers in my 2.1 setup. I may move the Bose to surrounds if I can fit them behind the couch. Plus I still haven’t found a center I can fit into my configuration