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Message: <blockquote data-quote="john.mulvehill" data-source="post: 6963286" data-attributes="member: 625086">When you hook up that bass controller to the slash amp specifically, it actually goes from 0 to +15db.  I spoke to a knowledgeable JL tech support representative and he told me that there should be no problem having that specific bass knob all the way up and having the volume loud on the head unit.  However, the caveat here was that he said the gain should be set based on the head unit being 3/4 of the way up.  Then, the head unit volume should stay below 3/4 of the max and the remote bass control could be cranked up all the way without having to worry about blowing the system.So when I get the replacement sub, I should make sure the installer sets the gain by ear DMM or o-scope with the head unit volume at 3/4 of the max? Where does the 54.7 number come in that the JL tech support rep said the gain should be tuned to?</blockquote>

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