Is there a site that explains how many amps are needed for what power output ??? Or is this even close what i have here?? to me it seems not so correct. They say most cars alternator only uses 60% of the alternator leaving 40% left over for other uses For Example:
Alternator = 80 Amps 80 x .40 = 32 Amps
Please keep in mind this is an estimate only and not exact science. It is best to get your electrical system tested by a professional to determine the electrical system's 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 that 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 to determine the approximate continuous current draw of your amplifier.
1.) Determine fuse value of the amplifier.
2.) Divide the RMS power Rating by the Peak power rating.
Example:
50Watts 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 amplifiers fuse value was 30A, then 30A multiplied by 50% would be 15A of continuous current draw
Alternator = 80 Amps 80 x .40 = 32 Amps
Please keep in mind this is an estimate only and not exact science. It is best to get your electrical system tested by a professional to determine the electrical system's 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 that 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 to determine the approximate continuous current draw of your amplifier.
1.) Determine fuse value of the amplifier.
2.) Divide the RMS power Rating by the Peak power rating.
Example:
50Watts 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 amplifiers fuse value was 30A, then 30A multiplied by 50% would be 15A of continuous current draw