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|Amp SafetyFuse amplifier’s power wire at the battery
Be sure to fuse the power wire within 12” of the car’s battery. This will protect the car’s battery in case of a short circuit between the power amplifier and battery. This is a must; the amplifier’s built-in fuse will only protect the power amplifier not the car’s battery!
Use high grade wire and connectors
Do not run any wires underneath vehicle
Exposed wires have a chance of being cut or damaged. It is best to run all wires though the vehicle under the carpet and/or side panels. This lends to a cleaner installation and less risk of damage.
Use caution when mounting amplifier
Remember there are many electrical wires, gas lines, vacuum lines, brake lines as well as gas tank in the automobile. Make sure you know where they are when mounting the amplifier to avoid puncturing lines, shorting wires or drilling holes in the gas tank.
Run signal wires away from electrical wires
To avoid possibility of induced noise from the car’s electrical system (I.E. popping noises or engine noise), run wires away from the car’s electrical wiring.
Make all ground wires as short as possible and at the same point
In order to reduce the chance of ground loops (I.E. engine noise), make the grounding wire as short as possible to reduce the wire’s resistance. Also, when using multiple components, make sure all units are grounded at the same point.
Avoid sharp edges when running the wires
When laying wiring inside the car, watch for welding burns in channels throughout the car. If necessary adequately grind, finish sand or fill in around any ruff spots so wires will not be punctured by sharp protrusions. To avoid the possibility of power, signal or speaker shorts, be careful not to allow the amplifiers wires to come in contact with sharp edges. Use a grommet to protect the wire when running through the fire wall.
Determining the current capabilities of your vehicle
Before installing a power amplifier in your system you should take into consideration the vehicle’s ability to provide adequate current to the amplifier. The most vehicles, the alternator is only capable of supplying a little over requirements for the standard electrical system. You should take into consideration the vehicle’s ability to provide adequate current to the amplifier. The most vehicles, the alternator is only capable of supplying a little over the requirements for the standard electrical system (I.E. headlights, air conditioning ETC)
Depending on how you play your system will determine the amount of current you will need. For example you listen to your system and low listening levels, and then you’ll probably use less than one-third the rated current draw. If you play your system loud, then you will use most of the rated current of the amplifier.
Most alternators have a mental tag stating the total average available. If you can’t find the tag, check with the manufacture to find out the rated amperage. Once rated current of the alternator is determined, you need to multiply this number by .40 in order to determine the reserve current available for use with your power amplifier.
Alternator = 80 amps 80 X .40 = 32 amps
Please keep in mind this is an estimate only not exact science. It is best you get your electrical system tested by a professional to determine electrical systems true capabilities.
Example: 50 Watts RMS divided by 100 watts peak power = .50 (50%)
Once you figure the percentage of RMS vs. peak power, you multiply the fuse value of the amplifier by the RMS percentage.