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someone please check my math
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<blockquote data-quote="lord baccus" data-source="post: 3058950" data-attributes="member: 575878"><p>i measured from the subs to where the mic go's and got 7'</p><p></p><p>give or take an inch.</p><p></p><p>so 7'x4=28' gives me the 1/4 wave</p><p></p><p>devide 1131 the speed of sound by 28'= 40.39Hz</p><p></p><p>so i port to 30.39Hz - with cabin gain should peek @ 40.39Hz</p><p></p><p>but what about the ports fireing 90degrees out of faze, ???</p><p></p><p>subs are pointed forward into the back of the seat &amp; the ports are fireing up along the back window line.</p><p></p><p>i drive a 1988' Ford F-150 x-cab</p></blockquote><p></p>
[QUOTE="lord baccus, post: 3058950, member: 575878"] i measured from the subs to where the mic go's and got 7' give or take an inch. so 7'x4=28' gives me the 1/4 wave devide 1131 the speed of sound by 28'= 40.39Hz so i port to 30.39Hz - with cabin gain should peek @ 40.39Hz but what about the ports fireing 90degrees out of faze, ??? subs are pointed forward into the back of the seat & the ports are fireing up along the back window line. i drive a 1988' Ford F-150 x-cab [/QUOTE]
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someone please check my math
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