After much thought what about the corners?
The size of the room has a lot to do with the effect more than you think, stereo is a funny squirrel burring his nuts all over your back yard. At lower volumes you probably enjoy the stereo effect more than at high volumes when at the corners. Slightly angle your K horns from the corner in either direction just a twist, see what happens. If your room is squire your speakers fire the sound into each other almost canceling and stereo effect.
The problem is the directional k400 horn and k-77 tweeter. The solution a midrange that more open like the altec Lansing 811b 511b and any other B. and a tweeter that has less forward focus.
The size of the room has a lot to do with the effect more than you think, stereo is a funny squirrel burring his nuts all over your back yard. At lower volumes you probably enjoy the stereo effect more than at high volumes when at the corners. Slightly angle your K horns from the corner in either direction just a twist, see what happens. If your room is squire your speakers fire the sound into each other almost canceling and stereo effect.
The problem is the directional k400 horn and k-77 tweeter. The solution a midrange that more open like the altec Lansing 811b 511b and any other B. and a tweeter that has less forward focus.