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<blockquote data-quote="squeak9798" data-source="post: 2226893" data-attributes="member: 555320">You must take into account efficiency.If the amplifier outputs 2000w, and is 70% efficient (i.e. the power output is 70% of the power input), then the amplifier is going to have a total wattage draw from the electrical system of 2857w2857w * 70% = 2000w [rounded]Or, using elementary mathmatics to work backwards since we know the power output of 2000w and our theoretical efficiency of 70%;2000/.7 = 2857wThus when calculating current draw, you need to calculate it using the total power consumed by the amplifier (i.e. the power input), not what the amplifier outputs.So, to output 2000w at 70% efficiency at 14.4V, we divide the total power consumed by the amplifier (found above) by the voltage to find the current draw;2857/14.4 = 198.4ASo, the full picture looks like this;14.4V * 198.4A = 2857w power input (rounded)2857w input * 70% efficiency = 2000w output (rounded)</blockquote>

[QUOTE="squeak9798, post: 2226893, member: 555320"] You [B]must[/B] take into account efficiency. If the amplifier outputs 2000w, and is 70% efficient (i.e. the power output is 70% of the power input), then the amplifier is going to have a total wattage draw from the electrical system of 2857w 2857w * 70% = 2000w [rounded] Or, using elementary mathmatics to work backwards since we know the power output of 2000w and our theoretical efficiency of 70%; 2000/.7 = 2857w Thus when calculating current draw, you need to calculate it using the total power consumed by the amplifier (i.e. the power input), [I]not[/I] what the amplifier outputs. So, to output 2000w at 70% efficiency at 14.4V, we divide the total power consumed by the amplifier (found above) by the voltage to find the current draw; 2857/14.4 = 198.4A So, the full picture looks like this; 14.4V * 198.4A = 2857w power input (rounded) 2857w input * 70% efficiency = 2000w output (rounded) [/QUOTE]

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