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Message: <blockquote data-quote="Coolhand20th" data-source="post: 8833706" data-attributes="member: 676743">Always been taught to do it this way. Subsonic should be 2-3hz below box tuning and remote bass knob (if it has one) from amplifier all the way up and using a 0db 40hz tone. 12volt also has the voltage calculator as well for ohms and how much wattage. Just enter the info and will give you what the volts should be when setting the gains via DMM.Edit: Also have head unit volume at 75% or close to it when setting the gains.[URL unfurl="true"]https://www.the12volt.com/ohm/ohms-law-calculators.asp[/URL]</blockquote>

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