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Series resistances (in this case 4 ohm speakers) will combine according to this equation: Rt = R1 + R2 + R3. Carefully search for screws that hold the dash piece. If you own a hatchback, for example, you will have to calculate the cubic feet of the hatch area, keeping in mind that you'll still need to be able to get to your spare tire. Before drilling any holes, carefully check the area underneath the vehicle where the amplifier will be mounted to make sure it will not interfere with wires, brake lines, fuel lines, the fuel tank or any other objects that could be damaged.
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caraudiohelp. RCA cables (audio cable) RCA cables are what carry the sound signal from the amplifier to the radio in your car. That just isnt true. Connect the speaker wires to the amplifier.
Here is where you learn how to connect the speaker wires.
1. First of all, you have to run speaker wire from the amplifier to the speakers and/or subwoofers that the amplifier will be powering into. If you will be powering the speakers that are already in the vehicle, it's usually easier to run the speaker wire from the back of the radio when you are connecting the audio and remote turn-on cables. Then you have to route the speaker wire along with the audio cable and remote turn-on wire.
2. When you connect the speaker wire to your speakers or subwoofers, you have to be careful to keep the polarity consistent. The speakers will be out of phase and will cancel out each other's signal if you do not connect the positive wire on each speaker to the positive terminal of the amplifier. Usually, one strand of the speaker wire is silver and the other bronze, so you can easily make the right connection.