How do you modify your 701 to balance? Does the stock cable have 4-wires ? I am not a cable believer, but I believe in balance. I don't want to spend too much to modify the K701, if the stock cable has 4 wires, I can solder a 4 pin XLR plug by myself.
Read this http://www.head-fi.org/forums/f6/gui...abling-225819/
The text about middle of the set of pictures is what you want if you intend to use the stock cables. Very easy mod. You can even make a balance to SE converter with the left over stock SE plug.