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PA Top with AMT
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<blockquote data-quote="Carl Klinkenborg" data-source="post: 213479" data-attributes="member: 12770"><p>The tiny port will be hurting many aspects of your enclosure's performance. I used 100mm ports in the rear of my 20l enclosures with 10" drivers. It is a very common mistake to use ports which are too small, causing low port output due to port compression (which can easily exceed 15db) along with high port distortion. </p><p>The starting point of every port should be one having an area equal to the cone effective area then working backwards towards a practicable enclosure design. Large single flared circular ports perform best and multiple small triangular ports are the worst by a considerable margin. 'Professional' manufacturers of subs take note - you know who you are!</p></blockquote><p></p>
[QUOTE="Carl Klinkenborg, post: 213479, member: 12770"] The tiny port will be hurting many aspects of your enclosure's performance. I used 100mm ports in the rear of my 20l enclosures with 10" drivers. It is a very common mistake to use ports which are too small, causing low port output due to port compression (which can easily exceed 15db) along with high port distortion. The starting point of every port should be one having an area equal to the cone effective area then working backwards towards a practicable enclosure design. Large single flared circular ports perform best and multiple small triangular ports are the worst by a considerable margin. 'Professional' manufacturers of subs take note - you know who you are! [/QUOTE]
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