I heard these the other day at the Axpona show and was blown away. Click on the components page at Classic Audio Loudspeakers
First time I heard a field coil driver

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John
Main System- McIntosh MX119/MVP871/MC352/MC7106, Scratch built 2A3 ,Thorens TD-125mkII ,Klipschorns w/ALK xovers/Trachorns, Speakercraft MT8(4), Velodyne DD-18, Sonos ZP90,Boxee Box
Office System- Adcom GTP500/GPA545/GCD575,Technics SP15, Northcreek Signature Borealis