it isn't so much sonically matched, but more so for speakers with different bass capabilities. I do not know all the -3db bass points for the speakers mentioned, but say the M22 goes down to 60hz, the 150 goes to 80hz, and the QS8's to 100hz. You can then set the crossover according to each speaker's capability. It is a great feature and allows you to use each speaker to its capaicity, rather than setting the crossover to the least capable speaker.

-curtis