Others experience re: subs and Magmepan 20

I think it makes a huge difference to get those last notes about of the music, my wife says that she was surprised how much the subs helped. . . I have 20.1s and Kinergetic SW-800s amplified by a Pass x250 up front. I also have two super fast SVS-16 Ultras that work with my mini DSP/to do room correction and address those standing waves many people have mentioned. I make measurements with an Earthworks mic and REW and Multi Sub Organizer crunches the numbers that I enter into the DSP. I have 8 channels of DSP for my 2 Channel set up. I can't speak to doing this with less money or lower quality components. I believe you should match any sub augmentation with stuff of similar quality to the main speakers. With Maggie's they need to be non ported subs in my opinion to have more control and keep up with the panel speed. The coherence and imaging of my system is right on. I had some engineer friends over from work to assist me in installing my projector screen and they said that my neighbors should hate me. I told them I've never had one complaint. I turned the music up and they listened with mouths open. There was no boom just accurate involving full sound with pin point imaging. I took a long path to get here. I wish you luck on your quest ;)

-Steve

I have Martin Logan CLX and use a pair of Martin Logan Descent i subs with the CLX subwoofer filter added (the filter compensates for the low frequency roll off of the CLXs)  Integration seems to me to be seamless once the overall level of the subs are set properly.  They have 3 10 inch drivers facing 120 degrees apart and are self powered (2100W peak).  I don't hear the difference in sound between the subs and panels whether using solid state (Krell) or vacuum tube (ARC) to power the CLXs.

Rarely do I 'feel' the impact of the subs as I typically don't play my system at those levels.  As an aside, I remember when I first purchased the subs and had them running alone for break-in. to ensure I "loosened" them up, there were times when I had the volume on the subs set far above what turned out to be optimal level.  Objects in my listening room were rattling to the point of distraction, I thought I would have more work to be done on the room but as I turned out I never listen at those levels.

There are time when I wonder what the newer Balanced Force 212 would be like.

Duke really knows his stuff.  He came over to my apartment and we tried his SWARM system versus dual Rythmik F12G.  He helped me dial in my Rythmik subs and was very impressed with them.

imdoc, supposedly if you put subs behind the speakers, you'll have phase issues. You can, however, put subs in front of speakers and delay the phase, assuming the sub has phase control.