DH, the "no-crossover" feature appears to involve those speakers which use the 6 1/2" mid-woofer rolling off "naturally" at a relatively high frequency to blend with the tweeter, which does have a high-pass filter to roll it off. The M3 versions would be included, but the M2 wouldn't. I also recall that several years ago Ian replied to a similar question and stated that the M50 operated in that fashion, as well. Don't know if this is still the case with the present M50.

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Enjoy the music, not the equipment.