This Stereo Breakout Cable will connect Dual XLR 3 Pin outputs to a 3.5 mm (1/8") TRS stereo input connection.  This cable is primarily used to send output from mixers, dacs, and amplifiers into recording devices and receivers with 6.35 mm TRS inputs.  It will also function as an adapter for balanced headphones terminated in dual 3 pin XLR male and convert it to 6.35 mm TRS for single ended headphone outputs.  
 
The Pinout is as follows, also pictured above:
6.3 mm Tip, Left Channel : XLR Left Pin 2
6.3 mm Ring, Right Channel : XLR Right Pin 2
6.3 mm Sleeve, Ground : XLR Left & Right, Pins 1 & 3
 
The Right XLR channel is marked in Red, and the Left is marked in Black.
 
All cable options include excellent dielectric insulation and are fully shielded 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 per channel)
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 per channel)
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 per channel)
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 per channel)
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
 
XLR 3 Pin Female Connector Specs
Rhodium Plated Pure Copper Pins
Carbon fiber and nonmagnetic stainless steel housing
 
6.3 mm TRS Plug Connector Specs
Gold Plated Pure Copper Contacts
Carbon fiber and nonmagnetic stainless steel housing