What all do I need to have a balanced setup with HE-500, assuming I have something like a Audio GD NFB28?
Only the cables? Do the headphone need any modifications? Or just buy an aftermarket balanced cable, say something like this?
What kind of headphone connection type and termination type should I select?
Thanks in advance.
You need only to reterminate the default cable as in:
or buy an aftermarket 4 pin xlr terminated cable with Hifiman connections (the one you linked has different termination)