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Message: <blockquote data-quote="appleyard" data-source="post: 380874" data-attributes="member: 7751">thanks Yohannes you come handy in times.Ok lets discuss it rather than flaming each other and try to help this chap.If a 15" cannot play loud at low freq. I will give an illustration. Lets say we take a 12" and a 15 in a box tuned to 30hz. Now to reach 100 Db the 12" need more displacement than the 15" because of the cone area. but if you take the same amount of displacement for both subs (eg. 11mm) which sub will be louder?For sealed and ported. Lets take 12" in a 1.5 cu. ft. box. So one box is a 1.5cu. ft sealed and the other is a 1.5 cu. ft. ported with 3" port. Give each of these sub with 200w rms. Which sub will have more SPL?</blockquote>

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