I think the HE-6 had poor synergy with his gear. With the wrong amp they can sound slightly thin and bright, and I also didn't like the prototype pair of HE-6 out of his B22 at the 2009 Colorado meet. With a strong speaker amp the HE-6 really start to shine, but I still find that most headphone amps don't do them justice. I'd say that they have the same or even higher demands for an amp that the K1000 have.
Edited by HeadphoneAddict - 8/27/11 at 9:46pm