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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
Use proper power wire size for maximum current transfer and safety. Improper size power and ground wire can reduce the amplifiers power and poses a risk of damage to the amplifier and the vehicles electoral system. Please follow the recommended “amplifier’s power cable requirements” to ensure maximum power transfer and safety.  To ensure maximum power transfer and secure safe connections, it is recommended to use high grade barrier spades (for connection at amplifier) and terminal rings (for connection at battery).

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.

For Example:

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.
Calculating Amplifier Current Demands
By using the fuse value of the amplifier you can get a rough idea of the amount of current draw the will be used under full output power. Although the full output rating is good to determine the total amperage draw in the system, it does not represent the true continuous or averaged amperage draw in the system. Listed below is a simple way in order to determine the approximate continuous current draw of your amplifier.
Determine fuse value of the amplifier
Divide the RMS power rating by the peak power rating.

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.
Example:If the amplifier fuse value was 30A, then 30A multiplied by 50% would be 15A of continuous draw.
Upgrading your electrical system
Depending on systems current requirements vs. your electrical systems capability, you may need to upgrade your electrical system. For example, if you find that your headlights dim when you have your system cranked up when you are driving at night, this is a sign you should upgrade your electrical system.
There is several different ways order to accompilish this: one way is to updrade the alternator so that it has higher amperage output. Another way is to purchase a capacitor. We recommend to consult your car audio retailer to determine what is best for you system.