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Message: <blockquote data-quote="Villeza1" data-source="post: 7828703" data-attributes="member: 608393">voltage = sqrt( watts X ohms)1000 watt rms @ 4 ohmvoltage= sqrt(1000x4)v=sqrt(4000)v=63.25 (This will need to be clean power)To add, you will need to choose a test tone that is similar in output as the music you listen to i.e. -5db or -10db. You also need to find at what freq is the highest and lowest imp rise and choose a freq in between those as a compromise for daily us. Usually, if the enclosure is ported, you want to choose a freq thats between port and peak freq for daily, so your subs get the best power from the amp. You set too high and you will suffer clipping, set too low and you will suffer with low output from the amp.</blockquote>

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