FFLs seem to be another myth now huh... renaming an old technology with a new name. You mean planar magnetic or just planars? Planar mags heard re-paded Hp-3 over a week and HE-4 for a short time from speaker taps. Never owned any. They are so puny when compared the Magnepan 1.7s I heard, planar mags at its finest. Other planars I auditioned - Stax 3030 system and Wacharas DIY cans. What makes you so curious what I heard or didn't ?