XLR cables use a balanced connection, transmitting the audio signal alongside an inverted copy of itself across a three-pin connector. Any interference picked up along the cable's length affects both signals equally, and when combined at the receiving end, this interference cancels out while the original audio signal remains intact. This makes XLR connections significantly more resistant to noise and interference than standard unbalanced RCA cables, particularly over longer distances.

This noise rejection has made XLR the standard connector in professional studio and live sound environments, and it's increasingly common on higher-end Hi-Fi equipment too, particularly preamplifiers, power amplifiers and DACs designed with longer cable runs or noisy environments in mind. XLR connectors also feature a secure locking mechanism, reducing the risk of an accidental disconnection compared with a standard RCA plug.

If your equipment supports balanced XLR connections, particularly for longer cable runs or in an environment with potential interference, XLR cables offer a genuinely more robust and reliable analogue connection than unbalanced alternatives.