Added the Intruder to drive a pair of HE-6 w/the benefit of a quality portable amp. On the balanced HE-6, the sound is clear and the background black, and the phones are opening up while burning the system in. The volume needs to be pushed to max on sources as well as amp, but this doesn't seem to affect SQ. Am hoping to hear impressions of others with this combination.
Are you in high gain? I don't need to use max volume but I guess it depends upon what you are listening to.