Just a minor point (I had the Spora 3s)... and most folks probably know this but they aren't "rear ported" in the conventional sense. In fact, their downward firing bass reflex port actually vents to the front of the speaker along the base, so they might better be described as front-ported. In any case, certainly moving them back/forth etc. will reinforce the bass in different ways so I don't mean to disagree with your main point, I just want to make sure folks understand these speakers aren't really "rear" ported and, as such, can probably move closer to rear walls than some other designs. I'll also say that in my room (about 18 x 21 with part open towards the kitchen) bass was never boomy or overloaded. In fact, I ended up getting rid of the speakers because in my room/system the mid-bass was far too lean... the deep bottom end was satisfying and solid but mid-bass always sounded weak without the impact I'm used to hearing (again, in my room and with my gear). Back to my old AVS rockets while I save and search for another set of speakers that I hope can be end-game...
