Amplifier Wiring: OFC vs CCA?



What should you choose, oxygen free copper (OFC), or copper clad aluminum (CCA), for your amp's power and ground wiring?


In short, go OFC!


Aluminum, even with copper cladding, just does not carry power as easily from the battery to the amplifier. Sure, CCA is the cheaper wire. But as usual, you get what you pay for.



The video gives a great demo on how 15 feet of OFC carries more power from the battery to the amplifier than 15 feet of CCA wire. Thanks Brad!


Effectively, amps x volts = watts or watts / volts = amps. So 500 watts / 12.8 volts = 39.0 amps on the OFC wire. 400 watts / 11.3 volts = 35.4 amps on the CCA wire. So you can easily see the OFC wire carries more voltage and amps to the amplifier allowing it to produce about 100 watts more power. That’s a 25% increase from CCA to OFC wire!


Just in case you’re not convinced. At least increase your wire a size up if you decide to stick with CCA instead of OFC. For example, instead of 8 gauge on a 300 watts RMS system, choose 4 gauge. You could probably go with 6-gauge CCA in place of 8 gauge, but good luck finding that size wire. (-;

-Text proudly proofread by Rachelproofsyou.com

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