The VMPS "planar midrange driver" mentioned about was actually invented, designed, and manufactured by Bruce Thigpen of Eminent Technology. Bruce named it the LFT (Linear Field Transducer), and it is available today in his marvelous LFT-8b loudspeaker. Bruce employs the LFT driver in that loudspeaker to reproduce frequencies 180 to 10kHz, WITHOUT A CROSSOVER! Reread that sentence. ;-)
"Linear Field" is used in relation to the magnetic design of the driver: Bruce uses magnets on both sides of the Mylar diaphragm, creating a true balanced/push-pull magnetic-planar driver. Magnetically balanced/push-pull operation results in very low-distortion; in Robert E. Greene’s TAS review of the LFT-8b, he stated the loudspeaker had the most direct, lowest distortion sound he has heard ever heard, out of any loudspeaker. Harry Weisfeld of VPI stated the LFT-8b produces the best midrange he has ever heard, out of any loudspeaker, at any price.
In spite of all the above, everyone here will continue to ignore the best value in all of hi-fi. So be it. I have the LFT-8b (and LFT-4), the Quad ESL, and Magneplanar Tympani T-IVa, so I’m happy. How ’bout you? ;-)
"Linear Field" is used in relation to the magnetic design of the driver: Bruce uses magnets on both sides of the Mylar diaphragm, creating a true balanced/push-pull magnetic-planar driver. Magnetically balanced/push-pull operation results in very low-distortion; in Robert E. Greene’s TAS review of the LFT-8b, he stated the loudspeaker had the most direct, lowest distortion sound he has heard ever heard, out of any loudspeaker. Harry Weisfeld of VPI stated the LFT-8b produces the best midrange he has ever heard, out of any loudspeaker, at any price.
In spite of all the above, everyone here will continue to ignore the best value in all of hi-fi. So be it. I have the LFT-8b (and LFT-4), the Quad ESL, and Magneplanar Tympani T-IVa, so I’m happy. How ’bout you? ;-)