Nope, I totally can't/don't have one. Maybe one of the OC folks have some skills. Actually, I believe one of my programmer buddies at work solders. I bet I could get him to reterminate, but I'd probably want to grab an extra stock cable so I can use the HD650 at work and home.

Can you use a soldering iron? If so, re-terminate. Don't waste your money. The stock HD650 cable is pretty good.

Ey, what do you think about the HD600 stock cables?
There's a dude that keep saying that if you use the HD650 cables on the HD600, the HD600 became super better...
 

Dark magic?

Got hold of an almost new HD650 in immaculate condition and have been listening, modding and experimenting with it over the last days. I have also been able to compare it with my modded HD600 and I have to say that the 650s provide a tad more tonal coherency over the frequency spectrum. I concur with those who have been stating that they are a little more resolving than the 600s. CSDs are also a little cleaner, and - what measurements do not show - the bass is better integrated with the rest.
I am currently running these with slightly worn thus shallower pads and some damping, which takes down the midbass hump that I personally do not appreciate. They are nicely warm sounding, still providing enough detail without any hint of sibilance, edge or grain. I must say these seem to be the best investment into audio I have made so far.
Fourth pic is a reference as to how the stock hd650s measure on my rig.

Interesting mods. Pulls 2-3kHz up a bit but also seems to cause more mid-bleed from the bass. I would expect that frequency response to sound more wooly than stock, but maybe the upper mids that it pulls up make that inaudible.