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Car Amp Wiring Kits and Install Parts

Power and ground cable, fuses, fuse holders, terminals, speaker wire and harness adapters for fitting car amplifiers and speakers. 259 products from $3.99 to $591.99. The Wires Zone, METRA, T-SPEC and more.

259 products from $3.99

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Gauge, length and conductor: sizing the power cable

Amplifier power cable is sized by gauge, and a lower AWG number means thicker wire. Pick the gauge from the amplifier's current draw and the length of the run: a long cable or a powerful amplifier needs thicker wire to limit voltage drop and heat. The listings span 4, 8 and 12 gauge, plus thin 18 AWG wire suited to remote turn-on and other low-current runs. Check the conductor as well. Copper-clad aluminum (CCA) is lighter and cheaper, but it carries less current than oxygen-free copper (OFC) of the same gauge, so CCA is usually chosen one size thicker.

Fuse, terminals and vehicle harnesses

The fuse protects the cable, not the amplifier, so fit the holder close to the battery and rate the fuse at or below what the cable can carry. Match the fuse style to the holder before buying. Ring terminals must suit the cable gauge and the stud size, while quick-disconnect connectors are for speaker terminals and similar tabs. A vehicle-specific harness, such as a speaker adapter for a given Toyota, plugs into the factory connector and avoids cutting wires; items marked Universal rely on you to splice and solder or crimp each joint.

Questions about Car Amp Wiring Kits and Install Parts

Is a complete amp kit enough, or should I buy the cable separately?
A kit usually bundles power cable, ground wire, remote lead, signal cable and a fuse holder for a typical single amplifier. Buy components separately when the amplifier's current draw or the cable run needs a heavier gauge than the kit includes, or when you are wiring more than one amplifier.
What gauge of speaker wire do I need in a car?
Most car speaker runs use 16 to 12 AWG. Choose the thicker end for long runs to rear speakers and for lower-impedance loads, because thin wire adds resistance and wastes power as heat. For short runs at modest power, thinner wire is fine.
Can I run power and signal cables side by side?
Avoid it. Power cable carries heavy, fluctuating current that couples noise into RCA and other signal cable and shows up as alternator whine. Route power down one side of the car and signal cables down the other, crossing at right angles if they must meet.