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<blockquote data-quote="keep_hope_alive" data-source="post: 6749096" data-attributes="member: 576029">they may be efficient, but they aren&#039;t more than 85% efficient.&nbsp; so at 100A draw at 14VDC (best case) you&#039;re looking at 1400W RMS draw, and at 85% efficiency you&#039;re at 1190W RMS output (unclipped) as the fuse heats and blows.&nbsp; And that&#039;s at 14VDC supply.&nbsp; at 12VDC the power output will be even less (unless the amp has a regulated power supply making rated power between a 11-15VDC supply).in order to do 2000W RMS unclipped output you&#039;d need 2353W RMS input and at 14V that&#039;s 168 Amps.it&#039;s pretty simple Ohms law calculations.&nbsp; Efficiency will vary based on impedance load, output voltage will vary based on impedance load, but power input will always be greater than power output (heat = wasted power).I don&#039;t care if you&#039;ve &quot;heard&quot; they are &quot;underrated&quot;.&nbsp; the amplifier fusing will limit the amount of continuous power it can draw, thus limiting the amount of power it can output.Based on the fusing, you can expect rated THD.If you clip the amp, the average power output will be much more, hence the &quot;rating&quot;.&nbsp; I&#039;m sure you can clip it so you get 2000W RMS or Average Power out of the amp.&nbsp; But you wouldn&#039;t want to hear it nor give it to your subs.</blockquote>

[QUOTE="keep_hope_alive, post: 6749096, member: 576029"] they may be efficient, but they aren't more than 85% efficient. so at 100A draw at 14VDC (best case) you're looking at 1400W RMS draw, and at 85% efficiency you're at 1190W RMS output (unclipped) as the fuse heats and blows. And that's at 14VDC supply. at 12VDC the power output will be even less (unless the amp has a regulated power supply making rated power between a 11-15VDC supply). in order to do 2000W RMS unclipped output you'd need 2353W RMS input and at 14V that's 168 Amps. it's pretty simple Ohms law calculations. Efficiency will vary based on impedance load, output voltage will vary based on impedance load, but power input will always be greater than power output (heat = wasted power). I don't care if you've "heard" they are "underrated". the amplifier fusing will limit the amount of continuous power it can draw, thus limiting the amount of power it can output. Based on the fusing, you can expect rated THD. If you clip the amp, the average power output will be much more, hence the "rating". I'm sure you can clip it so you get 2000W RMS or Average Power out of the amp. But you wouldn't want to hear it nor give it to your subs. [/QUOTE]

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