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Message: <blockquote data-quote="1aespinoza" data-source="post: 8861052" data-attributes="member: 654802">Definitely something wrong in the install. My nephew had those same subs in a similar box with a JX500/1. They were also in a 21' Ram Crew Cab with the OEM radio and the sound was tight.  What line output converter did you use? That box looks like the one he currently has, which is one cubic foot per sealed chamber. Those subs require 1.25 cu.ft. sealed and 1.75 cu.ft. ported per sub. An incorrect box can make the best sub sound bad and vice versa. Do you have the box specifications?</blockquote>

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