This adapter cable is terminated with a 4.4 mm Pentaconn jack and a 4 Pin XLR Male connector.  It will allow you to connect your balanced headphones & IEMs with 4.4 mm Pentaconn terminations into DAP's, DAC's and amplifiers with 4 Pin XLR outputs.  This cable transmits a balanced stereo signal.
 
The Pinout is as follows, also pictured above:
 
XLR Pin 1, L+ : 4.4 mm Tip
XLR Pin 2, L- : 4.4 mm Ring 1
XLR Pin 3, R+ : 4.4 mm Ring 2
XLR Pin 4, R- : 4.4 mm Ring 3
 
All cable options include excellent dielectric insulation and shielding to reject EMI and RFI.
 
This Cable is available in OFC, SPOFC, OCC & Pure Silver. 
 
OFC Cable Specs
24 AWG Oxygen Free Copper conductors (4x)
High density braided copper shield.
PE dielectric insulation.
PVC Outer Jacket
Outer Cable Diameter:  6.3 mm
 
SPOFC Cable Specs
20 AWG Silver Plated Oxygen Free Copper Conductors (4x)
High density braided copper shield.
PTFE Teflon dielectric insulation
FEP Outer Jacket
Outer Cable Diameter:  5.8 mm
 
OCC Cable Specs
24 AWG Ohno Continuous Cast conductors (4x)
PE Dielectric Insulation
High density braided copper shield.
Aluminum Foil Shield
Double Layer Outer PVC Jacket
Outer Cable Diameter:  8.4 mm
 
Pure Silver Cable Specs
27 AWG Pure Silver conductors (4x)
FEP Inner & PE Outer Layer Dielectric Insulation
High density Silver Plated braided copper shield.
Aluminum Foil Shield
Double Layer Outer PVC Jacket
Outer Cable Diameter:  8.4 mm
 
 
4.4 mm Pentaconn Connector Specs
Gold Plated Pure Copper Contacts
 
4 Pin XLR Male Connector Specs
Rhodium Plated Pure Copper Contacts
Carbon fiber and nonmagnetic stainless steel housing