"There are two placement issues with the OMDs, however. If you want that deep, holographic soundstage, you want to pull them further into the room and place them wider if you can. If you put them where you put a typical forward-firing speaker you'll get some center clustering, though the timbres will be spot-on. If you want a sonic hologram, bring'em out into the room.
Secondly, the OMD-28s have very strong bass down into the 20s, so that's another reason to have them out from the front wall. I have my OMD-15s a little more than 3 ft into the room. If you have the room to bring OMD-28s 4-6ft into the room they'll probably blow your mind."
The placement considerations for the OHMs are quite similar though moving them out 4-6 feet may be overkill except for larger OHMs in very large rooms.
Secondly, the OMD-28s have very strong bass down into the 20s, so that's another reason to have them out from the front wall. I have my OMD-15s a little more than 3 ft into the room. If you have the room to bring OMD-28s 4-6ft into the room they'll probably blow your mind."
The placement considerations for the OHMs are quite similar though moving them out 4-6 feet may be overkill except for larger OHMs in very large rooms.