Here's a little more info about the Edition X from SoundStageGlobal.com
"Fresh off the success of its HE1000 flagship headphones, HiFiMan got lots of attention at CanJam with two new models, the Edition X and Edition S. The former is a slightly downscaled, more efficient version of the HE1000s. The company says it’s 20 percent lighter and has a sensitivity of 107dB, which is extremely high for planar-magnetic headphones, and in my brief listen it did seem to capture much of the HE1000s’ magic. The latter is a unique open-back, dynamic-driver model that includes magnetically attached plates that convert it to closed back. Both are projected to ship in late 2015. Prices are not set but expect something under $2000 for the Edition X and under $300 for the Edition S headphones."
http://www.soundstageglobal.com/index.php/188-shows-events/rocky-mountain-audio-fest-2015/rocky-mountain-audio-fest-2015-features/593-rocky-mountain-audio-fest-2015-headphones
The HE1000 is rated at 90dB/mW @ 35 Ohms. If SoundStageGlobal's and HifiMan's preliminary info is accurate, then the Edition X will be rated at 107dB/mW @ 25 Ohms. That's an efficiency improvement of 17dB over the HE1000!
I wonder what has been changed to allow for such a huge improvement in efficiency?
"Fresh off the success of its HE1000 flagship headphones, HiFiMan got lots of attention at CanJam with two new models, the Edition X and Edition S. The former is a slightly downscaled, more efficient version of the HE1000s. The company says it’s 20 percent lighter and has a sensitivity of 107dB, which is extremely high for planar-magnetic headphones, and in my brief listen it did seem to capture much of the HE1000s’ magic. The latter is a unique open-back, dynamic-driver model that includes magnetically attached plates that convert it to closed back. Both are projected to ship in late 2015. Prices are not set but expect something under $2000 for the Edition X and under $300 for the Edition S headphones."
http://www.soundstageglobal.com/index.php/188-shows-events/rocky-mountain-audio-fest-2015/rocky-mountain-audio-fest-2015-features/593-rocky-mountain-audio-fest-2015-headphones
The HE1000 is rated at 90dB/mW @ 35 Ohms. If SoundStageGlobal's and HifiMan's preliminary info is accurate, then the Edition X will be rated at 107dB/mW @ 25 Ohms. That's an efficiency improvement of 17dB over the HE1000!
I wonder what has been changed to allow for such a huge improvement in efficiency?