Okay so I measured impedence on my HE500 drivers to see how close it is to spec. The specs say it should be 38 ohms, however I am getting 52 ohms. This seems very close to the HE6 impedence of 50 ohms. Has Hifiman change the latest revision of HE500's? Mine is way out of spec, bought it new last month.
Edited by flargosa - 2/3/12 at 9:53pm