High Energy Design (HED) was a short lived series from C-V, later the tag was resurrected by C-V for a line of car audio.
You don't come across the HED stuff to often. I have two pairs of HED CV-3000's, (Do an AK search, there are pics of mine here) and I have only heard of two other pairs anywhere besides these. They are currently on hold for an AK member, one pair was just re-foamed, and the other pair still needs the foams.
They sound great, very efficient, and they have that typical west coast sound to them, making them a great rock speaker, although they do just fine on other material. If you love Van Halen, you should be very happy with them! If you love Van Beethoven, you could find a better pair of speakers.