Yes, It seems like all the speakers are sheilded, but the control pod is not. Normally a cellphone will cause all kind of noise in a speaker system of almost any kind, with my promedia's, I hear nothing, even holding the phone next to the speakers, The only time I hear hiss from a phone is on the Front Right with the control pod, in which I hear the hiss on all the speakers (so, it's the output of the control pod)
Also, yes both my front speakers are on either side of my 2 moniters, and they do shake quite a bit with REALLY loud music..(Not to mention that it draws so much current that my lights dim just a bit when the bass hits)
Looks like I've got this 20A circuit just about maxed...