Brian, if you're referring to the current M50, M22 and M2 Axiom graphs, no, they aren't "listening window" measurements, they're on-axis. Just as the M3 and M80 listening windows at those frequencies are essentially identical to each other, certainly the other speakers would be as well when measured in that way. The listening window(over some small angle)measurement doesn't "drag down" the high frequency numbers, but on the contrary, evens them out.

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Enjoy the music, not the equipment.