If the human hearing apparatus could be influenced by a phase difference of, let's say, 10 degrees at 20 KHz (which I don't think any adult raised in an industrial environment can detect at a useful level anyway), how big a difference in interconnect or speaker wire length would be required to cause that difference? Nice little calculation problem. My guess is it would be a mile or so. If that's true, a difference of a few feet, or even a hundred yards or so, between one side and the other is really negligible.
But the effects on signal level and/or frequency response might be significant. I'll bet Altec could tell us.