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<blockquote data-quote="PowerNaudio" data-source="post: 1921398" data-attributes="member: 561215">i just did a build for a single 06S12L74d in a 3.093cuft tuned to 33.47 on the sub and dual port of 4&quot; X 7.18 X 39.77. the enclosure wangs so focking hard the owner could not belive it. he wanted two of them but he lacks the space. so i was if you go for a single it will be louder and hit lower. so we did it and the thing just rocks harder then his prior dual 06S12L74d 4 cuft sealed with the same amp.but any ways from the measured 60x20x25 after mdf displacement you have about 14.7cuft of in thernal volume. that with a single port at 4&quot; x 18&quot; x L20&quot; its like -.989 cu ft of displacement. itll leave you with about 13.5cuft for the subs after port and sub displacement wich is big enogh for both subs to be plenty happy. tuned at 22.78Hz F0=28.5Hz F3=22.8&nbsp; this number will be so that the subs can hit as low as they can and still be loud as hell and no port noise.just me two cents.laters</blockquote>

[QUOTE="PowerNaudio, post: 1921398, member: 561215"] i just did a build for a single 06S12L74d in a 3.093cuft tuned to 33.47 on the sub and dual port of 4" X 7.18 X 39.77. the enclosure wangs so focking hard the owner could not belive it. he wanted two of them but he lacks the space. so i was if you go for a single it will be louder and hit lower. so we did it and the thing just rocks harder then his prior dual 06S12L74d 4 cuft sealed with the same amp. but any ways from the measured 60x20x25 after mdf displacement you have about 14.7cuft of in thernal volume. that with a single port at 4" x 18" x L20" its like -.989 cu ft of displacement. itll leave you with about 13.5cuft for the subs after port and sub displacement wich is big enogh for both subs to be plenty happy. tuned at 22.78Hz F0=28.5Hz F3=22.8 this number will be so that the subs can hit as low as they can and still be loud as hell and no port noise. just me two cents. laters [/QUOTE]

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