Well, that's bad news, thanks Ross
How about this one. Straight Mode vs Pure Direct Mode. I've widened my mains so they are a similar distance from each other as I am to them. They are approximately 100" inces from one another. My chair is not dead smack center of the listening area. I'm just maybe 6 inces off center to the right. I'm listening to music on my Dish Hopper DVR or music on my iPhone via the Yamaha app.
When in Straight Mode, the primary vocals are heavy to the right. So much so that I'm swapping speakers to see if there might be something wrong with one of them. Or playing with balance levels. Both speakers are set at zero. There is no PLII or Extended Surround. Just simple Straight Mode playing PCM music.
When I'm in Pure Direct, the vocals are brought in to almost dead center, using my 50" Kuro as a reference point. Pure mode has a significant drop in volume. Obviously there is no sub running (using the sub out), its disabled. Music is just really crisp, practically no bass at all out of the Def Tech SM450's.
What's causing Straight to have such a drastic expansion of vocals and is there anything I can do about that? Of course, I could bring the mains back to the immediate left/right of the display, with a couple of inches to spare. But, isn't it better to have a near equal distance for a larger soundstage?
I sit about 90" from the display.