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<blockquote data-quote="Hoots" data-source="post: 8333072" data-attributes="member: 663736">I have a sundown audio sa 12 in 32 hz ported boxIm running it on a precision power s550 @1ohmThe back of the amp is confusing me , there is no gain nob. It is as follows level , lpf , and subsonic.Hers a diagram : <a href="http://www.manualslib.com/manual/545475/Precision-Power-S1300-1d.html?page=8#manual" target="_blank">Precision Power S1300.1D Owner&#039;s Manual And Installation Manual (Page 8 of 12)</a>What should my lpf , subsonic and level be set at? And why is there no gain nob. Also what direction do i turn the screw , thats also confusing theres no arrow or anything...I am scared of clipping and messing up my sub , so I&#039;m scared of doing it by ear. Where do I plug in my multimeter , because when I plugged it in and used a 50hz test tone I was picking up nothing.I am extremely confused and scared of messing up my equipment , help me asap and ty!</blockquote>

[QUOTE="Hoots, post: 8333072, member: 663736"] I have a sundown audio sa 12 in 32 hz ported box Im running it on a precision power s550 @1ohm The back of the amp is confusing me , there is no gain nob. It is as follows level , lpf , and subsonic. Hers a diagram : [URL="http://www.manualslib.com/manual/545475/Precision-Power-S1300-1d.html?page=8#manual"]Precision Power S1300.1D Owner's Manual And Installation Manual (Page 8 of 12)[/URL] What should my lpf , subsonic and level be set at? And why is there no gain nob. Also what direction do i turn the screw , thats also confusing theres no arrow or anything... I am scared of clipping and messing up my sub , so I'm scared of doing it by ear. Where do I plug in my multimeter , because when I plugged it in and used a 50hz test tone I was picking up nothing. I am extremely confused and scared of messing up my equipment , help me asap and ty! [/QUOTE]

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