This adapter cable converts your 4 Pin XLR male terminated cable to a 2.5 mm TRRS plug.  Most commonly used for connecting balanced headphones terminated with a 4 Pin XLR Male to a 2.5 mm TRRS balanced output from an Headphone amplifier, DAP or DAC audio source.  There are many length choices available to double as an extension cable.  This cable transmits a balanced stereo signal.

The Pinout is as follows, also pictured above:

4 Pin XLR, Pin 1, L+: 2.5 mm Ring 2

4 Pin XLR, Pin 2, L- : 2.5 mm Sleeve

4 Pin XLR, Pin 3, R+ : 2.5 mm Ring 1

4 Pin XLR, Pin 4, R- : 2.5 mm Tip

All cable options include excellent dielectric insulation and shielding to reject EMI and RFI.

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

2.5 mm TRRS Connector Specs

• Gold Plated Pure Copper Contacts
• Carbon fiber and nonmagnetic stainless steel housing

XLR 4 Pin Connector Specs

• Zinc diecast shell with locking mechanism
• Gold plated contacts