This Stereo Breakout Cable will allow you to plug in your 6.3 mm (1/4") TRS cable to convert it to an XLR 3 Pin Stereo input.  It functions as an adapter that is also an extension cable.
 
The Right XLR Channel is marked with Red and it's Pin 2 is connected to the Ring channel of the TRS Plug.  The Left RCA Channel is marked with Black and it's Pin 2 is connected to the Tip Channel of the TRS Plug.
 
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:  7.5 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
 
6.3 mm Jack Connector Specs
Securely locking cable jack
Nickel Plated Contacts
 
XLR Connector Specs
Rhodium Plated Pure Copper Pins
Carbon fiber and nonmagnetic stainless steel housing