Cork, I'm in agreement with Rick's comment that your experience appears to indicate that your sub isn't as good as it could be. There's no question that the M22s have strong bass output to below 60Hz(the anechoic chamber result isn't accurate below about 90Hz because the wedges aren't big enough), but a good sub should be even better around 60-80Hz. The Audyssey calibration measurements on my M22s resulted in a 60Hz setting, indicating that the response was strong enough there to justify that crossover setting. Nevertheless, I wanted my EP500 to handle more of the bass load and take it off the M22s, so I manually reset it at 80Hz. Generally, I'd suggest setting the crossover as high as possible with a good sub, regardless of the bass extension capability of the mains, as long as it's not high enough to make the sub easily localizable.
