Surround sound Wiring Diagram | Free Wiring Diagram Variety of surround sound wiring diagram. A wiring diagram is a streamlined standard pictorial representation of an electrical circuit. It reveals the elements of the circuit as simplified forms, and the power and also signal links between the devices. Surround Sound Diagram - how-to-wire-it The surround sound diagram shows how speaker cables provide the final, critical link from your AV receiver to the only components that actually produce sound - your speakers. As a result, these connections can be some of the most important in your system.