ddHiFi XLR44C/XLR44B Balanced XLR 4Pin to 4.4mm AdapterThe ddHiFi XLR44C adapter allows you to use traditional XLR 4 pin headphone cables with devices that have a 4. 4mm termination. It is a balanced adapter designed for audio applications. Conversion Between Two Balanced Terminals. The new audio devices are more likely to use 4. 4mmbalanced ports, while some headphone cables arestill with the traditional XLR 4Pin plugsNow with this XLR44C adapter, you can easily use yourXLR 4Pin headphones on 4. 4mm