Ah, so it is a bit more complicated.  I think I will cut off part of the cable and re-solder.  Thanks!

Hi everyone - My headphones just started acting up.  One side will lose a little bit of volume that can be fixed briefly if I wiggle the point where the cable goes into the cups.  There isn't any noise, just a volume drop.  I find that weird.  Any ideas what is happening?  Regardless, it looks...