Keep in mind that the response graphs are taken in an anechoic chamber which because of limitations due to the size of the wedges isn't accurate below about 90Hz. The minimum on the M22 impedance curve in the NRC measurements in the SoundStage review indicates that the M22 enclosure is tuned in the 50-55Hz area. My own in-room measurements with my M22s show pretty strong bass down to about 50Hz, so even a 60Hz crossover(which resulted from the Audyssey measurements)might be justified. I nevertheless manually reset the crossover to 80Hz, so that my EP500 would handle more of the lowest bass load and the M22s less.
