That could be one of your problems, if the receiver is sending stuff to your M22's that they can't handle, you're missing out on the bass in those frequencies that are getting lost. Try setting them to small and see if the missing bass shows up.
Beyond that its hard for me to understand how a room could completely saturate all of the bass coming out of the EP500? He was saying that sitting right next to it he can hardly hear it, & that the woofer cone barely moves. The woofer cones on my EP800 move so much they'd break my finger if I tried to touch them during some songs. So to me it definately sounds like a set-up or possibly an amp problem.
