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watts / 12 volts = amperage draw
Posted by Steven W [Email] (more from Steven W) on Mon, 18 Aug 2003 20:01:43
In Reply to: How much watts can I pull for my audio ?, Antoine, Mon, 18 Aug 2003 09:29:49
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This formula is considering your amps are 100 % efficient, which they will never be! Although most new audio gear comes within about 80 %...meaning it converts 80 percent of it's input power into output power.
This is basically a good figure to judge how many amperes of current your stereo is pulling at maximum output. Now, one thing to consider: music is a variable thing, it is never at the same level and frequency. With this being the case, it is not going to be drawing maxiumum current that it's capable of all the time...that is unless you feed it test tones, instead of music! It is still recommended however to build the system around it's maximum current draw
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