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Port question
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<blockquote data-quote="spoonraker" data-source="post: 2810403" data-attributes="member: 570956"><p>Well I'm trying to design a box for my 15'' Fi Q.</p><p></p><p>I'm thinking somewhere around 3-3.5ft^3 tuned to 28Hz...</p><p></p><p>So I open up WinISD and type in 3.5ft^3, 28Hz, change it to slot port... Now I don't know the exact dimensions of what I need the box to be, so just to test things I type in 20''x5'' for the port area. It tells me I need nearly 90 inches of port length...</p><p></p><p>So just for fun I switch it to a round port. I type in a single 5'' diameter port, it says I need about 15.5'' of port length</p><p></p><p>Can that be right? Why does a round port require SO much less volume? The slot port volume is 9,000in^3 but the round port volume is only ~243.5in^3</p><p></p><p>Am I just using winISD wrong, is my math way off, or are round ports just way easier than slot ports?</p></blockquote><p></p>
[QUOTE="spoonraker, post: 2810403, member: 570956"] Well I'm trying to design a box for my 15'' Fi Q. I'm thinking somewhere around 3-3.5ft^3 tuned to 28Hz... So I open up WinISD and type in 3.5ft^3, 28Hz, change it to slot port... Now I don't know the exact dimensions of what I need the box to be, so just to test things I type in 20''x5'' for the port area. It tells me I need nearly 90 inches of port length... So just for fun I switch it to a round port. I type in a single 5'' diameter port, it says I need about 15.5'' of port length Can that be right? Why does a round port require SO much less volume? The slot port volume is 9,000in^3 but the round port volume is only ~243.5in^3 Am I just using winISD wrong, is my math way off, or are round ports just way easier than slot ports? [/QUOTE]
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