I believe the higher level models use field coil drivers. Yes, Voxativ drivers use whizzer cones which, in the past in other loudspeaker brands, I have not been terribly impressed with. (Lowther, Fostex, etc) However with Voxativ's drivers and whizzer cones I do not detect any of the familiar sonic irregularities present in other "old school" designs. I am really taken by these loudspeakers (100 db sensitivity - I have the upgrade wooden cones) in combination with my 20 watt 300B SETs with more than ample power. Sound is well balanced, organic, agile, and with surprising impact within the physical limitations of the drivers. For now I do not find myself missing the lowest octave or finding fault with the upper treble. Thanks!