Mine arrived today and are still sitting brand new wrapped in the box. I was so excited when I ordered these. Though now I am hesitant to open them as I realized after reading this thread that I do not have anyway to drive them with.
Thinking I might just turn around and sell them here at a reasonable price. I wish I could keep them, but I just can not afford to buy a decent Amp and DAC to pair with them.
WTF? Plug it into any headphone jack and have a listen! It'll still play your music and still sound like the HD650. Better gear will give you refinement. You can go down that path later if the HD650 is to your liking.