Now I am curious. I reached out to one classified to see if they are still available. I had HE4 but much preferred HE500*. The “haze” description sounds right from memory. HE4 was more Stax Lambda (open and clear but HE4 more v-signature and bass extension) and HE500 was more Grado. I hope Im not way off base it was a while ago. *My upchain gear probably affected.