speaker and seating position for magnepans

I suppose, in light of all that, I know why the pyramid foam, on the wall behind the Maggies, works so well. I only have my own excellent results and the opinion of everyone that's heard my system lately(mostly pros of one stripe or another), to go by. I learned, many decades back, as result of setting up so many live music venues, a sound booth(or listening seat) placed against a back wall, never works well with regards to critical listening. Also: That no two rooms are alike. Actually, if one has the room, 10’ should be the minimum, from the back wall, for best bass reproduction. I have no doubt, there are many that prefer what they hear, seated against their back wall, given the huge bass peak, in that position. http://arqen.com/acoustics-101/speaker-placement-boundary-interference/

@wipespreadpanic- Experimentation, in this arena, is always the best(or- necessary) course, given how listening tastes vary so widely. Have fun!

Thanks to all for your advice. I have another question though. I have a memory foam mattress topper stuffed under a bed. Does this have any good absorption or dispersion effects?

Hanging anything soft(blankets, curtains, etc)in your room, is bound to affect something, soundwise. Various thicknesses, shapes and densities of foam, are chosen to target certain frequency ranges. ie: I chose the 2’ X 4’, 4" pyramid foam, to diffuse the very narrow back wave of my Maggies, and minimize any reflections. I wouldn’t expect a thin, flat mattress to have much overall effect, BUT- you have nothing to lose by experimenting with it.