This 4 Pin Mini XLR female to 2.5 mm Mini TRRS plug is compatible with the Milian Acoustics Max-I Isolation Headphones.  It has the same specifications as the stock cable that comes with the headphones.
 
This cable will transmit a balanced signal from audio sources with 2.5 mm TRRS outputs.  The Pinout is as follows, also pictured above:
 
Mini XLR Pin 1, L+ : 2.5 mm Ring 2
Mini XLR Pin 2, L- : 2.5 mm Sleeve
Mini XLR Pin 3, R+ : 2.5 mm Ring 1
Mini XLR Pin 4, R- : 2.5 mm Tip
 
This cable is available in Oxygen Free Copper, and Silver Plated Oxygen Free Copper. 
 
OFC Cable Specs
24 AWG Oxygen Free Copper conductors (4x per channel)
High density braided copper shield.
PE dielectric insulation.
 
SPOFC Cable Specs
20 AWG Silver Plated Oxygen Free Copper Conductors (4x per channel)
High density braided copper shield.
PTFE Teflon dielectric insulation
FEP Outer Jacket
 
2.5 mm TRRS Connector Specs
Gold Plated Pure Copper Contacts
Carbon fiber and nonmagnetic stainless steel housing
Elevated Shelf for use with Media players with cases
 
Mini XLR 4 Pin Female Connector Specs
Gold Plated Pure Copper Contacts
Nickel Plated Knurled Shell