The Jot 2 should be used with a 4-PIN XLR cable.
Right now I am actually listening to these babies so I decided to post about it. Ha!
A friend from the UK modded mine into a brand new HE-560 shell and did a few mods like exchanging the connectors to 2.5mm (3.5mm is possible too, most of my cables are 2.5), Sorbothane, Blu Tack etc.. On classic shells he exchanges all the screws and changes the headband mounting screws so that you can simply add your favorite Audeze headband if you ever wanted. All by yourself.
He added Sorbothane to the hollow parts of the shell and it really helps keeping everything clean, no matter the (sub)bass. I'm really proud of this beauty, no matter whatever else I own. The HE-500 are unique with their liquid and dreamy presentation, especially in their mids. I find blu tack and sorbothane the most important, they really get the most out of the driver. The bass texture and control is a huge stepup and I don't need to EQ it ever at all. Just fyi as some people fear losing out on bass with the mods. Yes, the bass will get tighter but also cleaner and rise up in quality.
HE-6 is technically on another level but a different beast (you should own one too). The modded 5LE simply got eaten up as it was a baby version of it or let's say trying to be a HE-6 but not quite reaching the technical competence and linearity. HE-500 just wanders along to its own tune and melody.
It's uniqueness can not be overstated.