Car Audio Power Cable Calculator

The right cables and wires ensure that the strongest signal is going to the correct destination and that a sufficient amount of power is being sent to the receiving components. To calculate the proper power and ground cable sizes find the distance of the power cable along the top row. One of the most important connections in a car audio system is the power and ground cable that connect the vehicles battery to an aftermarket amplifier.

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If your measurement is between two measurements use the higher one.

Car audio power cable calculator.

This is an allowance for the amplifier to cope with peaks without distortion. Car stereo power and speaker wiring american wire gauge sizes connect additional devices to remote turn on wire relay diagram power and ground cable sizes radio on until door opened relay diagram stereo to bridged mono switched outputs relay diagram subwoofer wiring wizard switch series to parallel and back relay diagram switch stereo to bridged mono series. When using only one battery refer to the primary. Will that amplifier uses three sets of power and ground cables.

At least 3db headroom is generally recommended. If your measurement is between two measurements use the higher one. 5 the power of the amplifier measured in watts. Choosing which battery to use to power your audio system can be daunting when faced with all sorts of numbers and specifications that don t seem to have anything to do with car audio at all.

In the calculator below first input the distance from the speaker and select feet or meters. Note that for every 3db allowance the power requirement doubles. Each of the positive power leads should be fused with a 225 amp fuse to protect the wires and your car from catching on fire in the case of a short circuit and support that huge output. Next find the total rms power the cable must support on the left.

With our wattage chart below the choice has never been easier.

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