Do you want to connect your boxes, subwoofer, or headset? There are several audio connectors that can be used to link different devices. Choose the correct type of connector and the correct cable length. For example, do you need a cable to connect your smartphone to headphones or a wireless speaker? Choose a 3.5mm AUX cable. Or do you want to connect your instrument to an audio interface? Check out midi cables. Audio splitters are useful if you want to split one audio signal into multiple signals.