Which type of connector is commonly used for professional audio microphone cables?

• A. XLR Connectors
• B. RCA Connectors
• C. BNC Connectors
• D. USB Connectors

Answer: (A)

The type of connector commonly used for professional audio microphone cables is the XLR connector. XLRs are designed for balanced audio, carrying two signal conductors plus a ground to cancel noise picked up along the cable. The three-pin, locking design keeps cables secure in live environments, preventing accidental unplugging. They also support phantom power, which many condenser microphones need, delivered through the same connector. This combination—robust, secure connection, noise rejection, and compatibility with phantom power—makes XLR the standard for mic cables in studios and on stage. RCA, BNC, and USB connectors serve other roles (consumer audio, RF/video, and digital interfaces) and aren’t the typical choice for professional microphone cables.