Supposedly (from research I did for mine) the capsules should be centered and I think it was 8 inches apart from eachother to get the good 'image', 8" is from my head, it couls have been 6", think ear drum distance, the seperation is outta control through headphones. Also, it is said to be best completely round with the caps centered. I guess the way the high end would almost creep arounf the corners could be effected. It's all about the placement too anyway. I can't wait to try it on a trio with centered drums and organ (or guitar) left and bass right, thats ideal for this!!