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Message: <blockquote data-quote="Cubed" data-source="post: 1785014" data-attributes="member: 567864"><p>My amp is rated 450 x 1 RMS at 4 ohm, however this is at .5% THD into 13.8v.  Question is I have always heard when talking about power ratings it should be at or less then .1% THD.  So if my amp is rated at .5% THD then they are blowing smoke up my butt about the 450 x 1.  So how can I find out what the true power rating of my amp is to properly set my gains?  Would an oscilloscope work or is there some way to use a DMM to find this out.  By the above formula I should adjust my gain so that the dmm reading would be 42.43.  It did not come with a birth sheet, also the amp is an Aura RPM2300.</p></blockquote><p></p>

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