Please read your MG20 owner's manual carefully and then give Magnepan a call with all your questions!
Your owner's manual just about answers every question you have asked on this forum.

Just like the others said, you can call Magnepan and they will be happy to answer your call. I have personally spoken to a person named Steven in Techincal, he was very helpful. But he told me very abruptly "first read your owner's manual!" and that was about 16 years ago.

I hope it all goes well for you K, because the MG20 is a great speaker that requires proper placement and the ideal room for them to sound right. To me it sounds like you defenitely have a serious room problem... Again your owner's manual talks about this under sections -room placement, room treatment and room acoustics, plus ideal room size for MG20; I forget what page it was...

If you don't have any of these traits, then I suggest purchase a smaller pair of maggies such as the 1.7QR (fantastic magneplanar speaker) to me set up properly sounds far more coherent than the MG20). I have been using magneplanars for over 20 years since 1986, and only recently switched to Electrostatics.

Magnepan is a very well established company and will be happy to assist. However, they do prefer that you also seek assistance directly from your Magnepan dealer, they should also know a great deal about magneplanars.

Cheers mate, and have a good one.
RJ