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Message: <blockquote data-quote="los33" data-source="post: 8696721" data-attributes="member: 660834">To get full voltage out of your headunit you need to have volume up 75% or more.. lucky number is usually 1-2 notches back from max volume so if max is 35 then 33-34..Now when using a voltage meter while playing a test tone set the prongs on the speaker output at the amp and use the normal formula of Voltage = square root of watts x ohms, that will be the main set point.From there you can add a bit more gain by ear till sub starts to clip since amps dynamicly on music can produce a bit more than rated.</blockquote>

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