Folks, I'm [hopefully] soon going to pull the trigger on a D90se + A90 descrete + DCA Stealth set up. I can get the amp end of the headphone terminated in a 4.4 or XLR end. They're both balanced and will both sound the same, and I'm not asking about that. I'm going to be using them in a...

*3.5PRO is a new standard proposed by the China Audio Industry Association Headphone Division and is said to be adopted by several Chinese manufacturers in the near future as an improvement over the original Hifiman proposed 3.5mm TRRS balanced plug. It is essentially just the same 3.5mm TRRS...