In reply to:
no bandpass on the midrange driver? just highpass?
Uhhh.. A band pass filter is a combination of a low pass and a high pass filter. As Alan stated, there is a low pass sending everything below 200Hz to the woofers, and 2 high(er) pass filters for the midrange driver and tweeter. In essence, that means that there are 2 bandpass filters in the M60s. One made up by the low pass filter and the 1st highpass filter, and one made up by the 1st and 2nd highpass filters. I'm lousy at ASCII art, but see if this can help you visualize it:
Low pass filter --- High pass #1 --- High pass #2
................ BP #1 .....|........ BP #2 .............
