I just did that a couple hours ago. I'm now also in the 650 Club. I re terminated my 600 cable with a Neutrik 4 pin and have been enjoying the 600s a very lot out of the Mjolnir. Also the 700s a bit but I keep going back to the 600. Don't have the means to get the 800s on there yet, though. That's next.
Fresh pads and headband. New headphone smell. Mmmmm.
Hey, good to see you here!