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<blockquote data-quote="Beatin&amp;#039;" data-source="post: 8056203" data-attributes="member: 646085">setting your gain with a DMM and test tone cd is so stupid easy.Make sure the subs are unhooked. Play a 0db or -3db 50-60hz tone and turn up the volume on the head unit to the max position where you would usually listen to music. Mine goes up to 50 so I like to tune at 30/50 instead. For you it could be a different range.While the tone is playing at which ever range on your HU you choose, set your DMM to AC voltage, usually at the lowest setting that reads up to 200volts. Then put the test leads on the speaker terminals on your amp and turn up the gain until you see the correct voltage reading for the ohm load your sub will let the amp &quot;see&quot;. Then, your done! Shut everything off and hook up the subs.by the way, what is the final impedance of the subs? The amp can send out 400wrms at what ohm load? I don&#039;t think we can figue out the target voltage reading on the DMM if we don&#039;t know the impedance of the subs and the ohm load the amp can deliver 400wrms to.</blockquote>

[QUOTE="Beatin', post: 8056203, member: 646085"] setting your gain with a DMM and test tone cd is so stupid easy. Make sure the subs are unhooked. Play a 0db or -3db 50-60hz tone and turn up the volume on the head unit to the max position where you would usually listen to music. Mine goes up to 50 so I like to tune at 30/50 instead. For you it could be a different range. While the tone is playing at which ever range on your HU you choose, set your DMM to AC voltage, usually at the lowest setting that reads up to 200volts. Then put the test leads on the speaker terminals on your amp and turn up the gain until you see the correct voltage reading for the ohm load your sub will let the amp "see". Then, your done! Shut everything off and hook up the subs. by the way, what is the final impedance of the subs? The amp can send out 400wrms at what ohm load? I don't think we can figue out the target voltage reading on the DMM if we don't know the impedance of the subs and the ohm load the amp can deliver 400wrms to. [/QUOTE]

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