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<blockquote data-quote="Z1NONLY" data-source="post: 7538201" data-attributes="member: 634086">There are a lot of variables when doing this. But the ohms law part is a constant. (The relationship between voltage, resistance and power)The reason there&#039;s still room for well informed people to make slightly different recommendations is because music is much more of a &quot;moving target&quot; than a test tone.Some people recommend setting gains with a -3db test tone because almost no music is recorded at 0db (full &quot;volume&quot; for a given type of media)Some differ on the HU settings used when setting the gain. (3/4 volume, full sub volume etc.)A lot of stuff will differ after your gains are set. You will adjust the volume and other settings on your HU. Some music will be recorded much lower than others and result in less output. The list is very long.What I try to do when I set the gains on the amp is make sure that my worst possible moments of adolescent, bass-track volume-twisting, still result in a clean, un-clipped signal for my speakers.Using a 0db test tone and high sub-out and volume settings (that don&#039;t result in clipping from the HU) when setting gains, help ensure that your speakers get clean power.</blockquote>

[QUOTE="Z1NONLY, post: 7538201, member: 634086"] There are a lot of variables when doing this. But the ohms law part is a constant. (The relationship between voltage, resistance and power) The reason there's still room for well informed people to make slightly different recommendations is because music is much more of a "moving target" than a test tone. Some people recommend setting gains with a -3db test tone because almost no music is recorded at 0db (full "volume" for a given type of media) Some differ on the HU settings used when setting the gain. (3/4 volume, full sub volume etc.) A lot of stuff will differ after your gains are set. You will adjust the volume and other settings on your HU. Some music will be recorded much lower than others and result in less output. The list is very long. What I try to do when I set the gains on the amp is make sure that my worst possible moments of adolescent, bass-track volume-twisting, still result in a clean, un-clipped signal for my speakers. Using a 0db test tone and high sub-out and volume settings (that don't result in clipping from the HU) when setting gains, help ensure that your speakers get clean power. [/QUOTE]

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