To elaborate on that post, the HE-6 represents the best in Orthodynamic headphones. All the advantages of the Electrostatics and Dynamics, without their limitations.
If I had to keep only one pair of full sized headphones, it would be the HE-6. It is the best balanced headphone I've heard. High end detail, speed, frequency response, and dynamics.
The bass response is simply phenomenal. You really have to hear it to believe it. Try some test tones too. I can just barely hear/feel bass as low as 12Hz with the HE-6. It's quite the head shaking at 50Hz, and even still down to 20Hz which is where it starts to roll off significantly.
And for the Smyth Research Realiser, it's a perfect match. It's open enough to preserve the "illusion". (closed headphones and IEMs cause an occlusion effect, a.k.a stuffed head feel, that detract somewhat from the experience). Has the frequency response to handle the huge dynamic range of sound that the Realiser puts out. Also, the HE-6 does not have phasing issues that can negatively effect the Realiser's output. I had some issues with a pair of LCD-2's at CanJam with Realiser demo tracks I had. I'd have to audition an LCD-2 at home to be absolutely sure. But if it's the same as what I heard at CanJam, I would absolutely not recommend the LCD-2 for use with the Realiser.
Edited by Edwood - 8/13/10 at 10:53am