Power Calculations  
This portion of this site is intended to help you calculate power levels. You can calculate any unknown value if you know the other two in the equation.  
Explanation of Terms  
E  stands for voltage, the unit is the Volt.  
I  stands for current, the unit is the Amp.  
P  stands for power, the unit is the Watt.  
R  stands for resistance/impedance, the unit is the Ohm.  
The Formulas  

Current Home Loudspeakers 101 Resistance/Impedance Voltage EMail