The 3.2 is the revision for ALL Mad Dog models we ship.
The balanced only changes the connectors and cable for users with XLR. It's more expensive because we have to make modifications to the headphone shell, as well as including the custom cable. DIY types can also make their own upgraded cables for the regular Mad Dog. So unless you want to use the phones with a balanced amp, there is no benefit to buying the more expensive model.
Ah, thank you for clearing that up. I am sorry for misunderstanding.
Also, are there any Mad Dog owners out there that also have the Fidelio X1? I'm looking for a closed headphone to compliment it better than my HP100... and am assuming the Mad Dogs may be the ones.
The HP100 was a goog closed alternative to the Annies but I recently switched to the X1, so any feedback on this matter is greatly appreciated.