Great, thanks! This is my first DIY attempt so I appreciate the feedback.
Initially I thought I'd need to just recable the 6-pin connector to change these from unbalanced to balanced. However, it appears that the cable between each set of cups has a shielded ground instead of separate wires.
- Can I use the existing shield as a wire in a balanced cable (i.e. use the shield for L- & R-) or would I need to recable this as well?
- Similiar question for the cups themselves, do I need to open up each side to check to make sure there are dedicated wires (instead of a ground wire) for L- & R-?
Here are some images, an existing (unbalanced) wiring diagram from Beyer, and a sketch of the new 6-pin balanced connection for reference.