Quote Originally Posted by E-Stat

You're forgetting something. Unlike electrostats where the diaphragm mass is the only moving component, you need to add the mass off all the magnets attached to the diaphragm in a Maggie (ribbon drivers not found on the Tympani series excluded).

rw
The're no magnets connected to the driven membrane of Magnepan speakers. The magnets are fixed, and the .0005 thick "voice coil" is bonded to the driven planar surface. The magnplanar tech is faster by far than any conventional driver, and also not reactive, so it's relatively benign to drive. The transient response of electrostats is phenomenal, but as you are aware more than anyone here, they are probably the most demanding speaker when it come to amplification.