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→Cables
Professional audio typically makes use of analog cables with 1/4" diameter jacks. Cables are generally described by how many lines they hold or how much power they can carry, which generally describes what they are used for. The jacks on each end of a cable have to be compatible with the cable, but can have much wider variety.
* Instrument - Designed to handle single low-level signals generated by sensors or transducers, such as guitar pickups. Typically connects the guitar to an amplifier or pedal and uses 1/4" male TS (Tip/Sleeve) jacks.
* Line-Level - Designed to handle medium-level signals generated or amplified by electronic equipment before power amplifiers. Typically connects pedals or effects units to each other and to an amplifier's front input or effects loop and uses 1/4" male TS jacks if mono, TRS if stereo.
* Speaker or Power - Designed to handle high-level signals generated by power amplifiers. Connects power amplifiers to speakers. Uses 1/4" male TS jacks.