Tonally, I wouldn't say they are the best balanced. There seems to be a lack of treble quantity and treble energy, though the extension seems to be there.I can see why people stated that these are slightly-dark sounding. I can definitely hear that. Good news! I just picked up a HE-6 again.So now I've got the HE-6, HE-1000, and the ED-X sitting next to each other.