Thanks for your message, I owned a pair of HD650s for about a year and they look and feel like the HD650 grills. Also, I was told by the two previous owners that they are 650 grills. My pictures are all very dark (the lighting in my room is poor for taking pictures). It is possible that we are all mistaken and they are HD600 grills, however I am fairly certain they are from the HD650.
4/8/14 at 6:07am