To be true to the sound of each, the M22s have a slightly better low end extension than the M3s, it is just the lack of midrange, the dip in the M3s graph after the little 100hz bump, that gives the M3 the illusion of better low end, when in fact it is the drop of midrange that you are hearing. You can great low performance from the M22s and mimic this low end bump the M3s have by using the bass control on the receiver. I find if you increase the bass by a few db and voila, the M22s now have more projected bass and all the crystal clear sound they are known for. Just something else to think about.
