The wiring you need for a car audio upgrade depends on the amplifier, speakers, subwoofer, factory audio system and how the system is being installed. Different systems require different cable types, cable thicknesses and connection methods, so it is important to choose wiring that suits the power requirements and layout of your vehicle.
For an amplifier installation, wiring may include a power cable, ground cable, remote turn-on wire, fuse holder, signal cables, speaker wire and suitable terminals or connectors. The size of the power and ground cable depends on the amplifier’s RMS power rating and current draw.
Speaker upgrades may also require speaker wire, vehicle-specific adapters, plug-and-play harnesses, mounting accessories or integration leads. In some vehicles, especially those with factory amplifiers or premium OEM audio systems, additional interface cables or integration modules may be required.
Using the wrong wiring can cause poor performance, voltage drop, noise, overheating, blown fuses or reliability issues. Good wiring is not just about connecting the system — it helps the amplifier, speakers and subwoofer perform safely and consistently.
For selected vehicles, Focal Inside Plug & Play speaker kits may simplify installation by using OEM-style connections where available. For more advanced systems with amplifiers, DSPs or subwoofers, professional wiring and system design are strongly recommended.
For the safest and cleanest result, speak with your nearest Focal Authorised Australian Dealer. A professional dealer can confirm what wiring is needed for your vehicle, amplifier, Focal speakers or subwoofer, and ensure the system is installed correctly.
