An XLR adaptor is a device used to connect audio equipment that uses XLR connectors to other audio devices with different types of inputs or outputs. XLR connectors are commonly found in professional audio settings, such as recording studios, live sound systems, microphones, mixers, and audio interfaces, because they provide a secure connection and high-quality, balanced audio signals.

The main purpose of an XLR adaptor is to make different audio devices compatible. For example, an XLR adaptor can allow a professional microphone with an XLR plug to connect to equipment that uses a 6.35 mm (¼-inch) jack, a 3.5 mm jack, or another connector type. Some adaptors also convert between male and female XLR connections.

XLR adaptors are designed to preserve sound quality by maintaining balanced audio signals, which help reduce noise and interference, especially over long cable runs. However, not all XLR adaptors perform signal conversion—some only change the physical connector, while others may include electronics to handle signal level or impedance differences.

In summary, an XLR adaptor helps bridge professional audio equipment with other audio devices, making it easier to integrate different systems while maintaining reliable and high-quality sound.