Ultrasone HFI-650 Cable replacement help

I bought the Ultrasone HFI-650s not 6 months ago and they were quite literally the last (new) pair on Amazon. I get them and they work great for a week. Then I start getting this high pitched whine during all my music, that kind of follows the music tone up and down. I send an email to Ultrasone and they tell me that because not only are the 650s discontinued, but because I did not purchase them through an authorized retailer (as far as I can tell, you can't if you live in the states like me), that there is nothing they can do to help me.

After a little experimentation, I discover that it's just this one spot in the cable (not the connector) that is causing all the trouble, and if I bend the wire right at that point, the problem goes away - so I tie a nice knot, making sure that the only part bent at an extreme angle is the one malfunctioning section of cord. All this worked great - until this morning.

I noticed that the whine was back, do I play around again, and find another spot in the cable, only this time, it's right next to the connector and there is no way to tie that knot again.

I spent $150 on these and they have amazing sound (when the cord isn't screwing them up), and would rather not throw them away - I would like to instead replace the cable. The only issue is I cannot find any kind of comprehensive guide to replacing the cable for the HFI-650s - or even a guide that explains replacing a cord as more than: "cut the cord, figure out which wire goes where, solder the wires to the new connector and you're done". I knew that much. But how do I tell which wire is which? Is there anything in particular I should be aware about these headphones? should I use a specific type of wire? can I find everything I need at Radio Shack?

Thank you in advance,

Odin5061

**EDIT**oh, and sorry if I posted this in the wrong place - wasn't sure if I should post here or in DYI**

I actually want to replace the entire cable. I haven't been abusing the cable what so ever and I've had two breaks in it in the coarse of six months, plus, I use mine mostly on the go and trying to keep a ten foot cable neat in my bag is a little difficult. Would this been too much different?

Since I have no warranty (apparently), I do not have too much of a problem opening them up and taking out the entire wire - I know how to solder and desolder.

Does anyone have a suggestion where I can buy the wire and jack that I need?

Odin5061

**EDIT**What about something like this:

http://www.radioshack.com/product/index.jsp?productId=2103871

Now, obviously it doesn't have to be a Radio Shack product, it could be a similar product from a better company. But since I really only need 6 feet or so, what if I cut off one end and solder that end into the Headphones. This way would also require me to do less soldering to get it right, and what soldering does take place would be inside the head phones, where it's better protected than it would be in a jack. Less soldering means a better connection in the long run.**