Wondering about these about a year now, anyone heard these yet ? (I'm not affiliated with these mfrs). http://verisonix.info/index.html http://www.in2uit.com/headphone/us/tech.asp Verisonix N500 & N501 models. In2uit I501 & I502C models. Some type of dynamic hybrid headphone. trademark name for technology is Electrostatz & Electrastatz. One site says driver is an EFL - electret flexible loudspeaker (with dipole soundwave radiation). May be an electret-cone hybrid, or possibly a mylar-cone hybrid or planar-cone hybrid. Low 32 ohm impedance, so maybe not planar-hybrid, and planar- or mylar- hybrids doesn't seem to make sense (? why the need ?), so maybe it is an electret-cone hybrid. Plug end has no transformer, unless a transformer is nestled into earcups for an electret-dynamic hybrid. Is it possible the electret film is self-biased ? Some tab clics on the sites show a dissambled diagram. N500 & N501 have 40 mm cone (mix of PU & paper pulp) + film diaphragm with 0.1% distortion. I501 & I501C have 50 mm cone + film diaphragm with 0.5% distortion. Models vary at either 3-6-12 Hz to 50,000 Hz frequency response, and 115 to 120 db SPL. They use word "dome" instead of cone (?inverted?, like a dome-tweeter on a loudspeaker or language translation error ?). Crossover may be at 1000 to 2000 Hz area roughly. Last year's In2uit I500B had a cheap headband assembly, looks like that model was dropped. Prices may be set too high. Designed in Taiwan & assembled in China - have seen these sell in Asia last year & now in USA, but just emerging. Has anyone heard these & your impressions ? Or, anyone weigh in on these ?