Ported design must go lower than sealed VP100. But only if you make use of the ports. Putting a M2 in that hole probably wouldn't make use of the ports. I never noticed the M2 going lower myself, but this is probably because I never mounted it to the wall as a speaker by itself. I put it on top of something to hold it in place for a few days while I tried it as a center. Then later mounted it above the TV with the VP100 below the TV. It could be that it wasn't close enough to the wall to register the lower notes.
The small on wall bookshelf designs have ports on the bottom of the speaker allowing the bass to escape and reverberate (?) off of the wall below them, perhaps amplifying it in the process. So a good mounting location is probably a requirement for them.
Last edited by CatBrat; 11/26/12 10:26 PM.
