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box tuning
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<blockquote data-quote="SPLEclipse" data-source="post: 5251097" data-attributes="member: 602411"><p>assuming those are outside dementions and you are using .75" material to build it, i got this:</p><p></p><p>net box volume: 2.222 ft^3</p><p></p><p>port area (with two 3" vents): 14.137 in^2</p><p></p><p>port length: 12.414"</p><p></p><p>net box volume: 2.12 ft^3</p><p></p><p>port tuning: 35hz</p><p></p><p>also...you can't cut the length for one 3" vent in half for two 3" ports. you have to look at overall port area and calculate the length for each port accordingly. in this case you would have two (2) 3" ports each with 12.414" of length. also, subtracting/adding .5" of port does not increase/deacrease the tuning by 1hz. port tuning isnt a linear function.</p><p></p><p>with one 3" diameter vent, you would only need 4.81" of length. your port area would be 7.069 in^2. that "should" be OK assuming it's an aeroport. thats really driver/power dependant though.</p></blockquote><p></p>
[QUOTE="SPLEclipse, post: 5251097, member: 602411"] assuming those are outside dementions and you are using .75" material to build it, i got this: net box volume: 2.222 ft^3 port area (with two 3" vents): 14.137 in^2 port length: 12.414" net box volume: 2.12 ft^3 port tuning: 35hz also...you can't cut the length for one 3" vent in half for two 3" ports. you have to look at overall port area and calculate the length for each port accordingly. in this case you would have two (2) 3" ports each with 12.414" of length. also, subtracting/adding .5" of port does not increase/deacrease the tuning by 1hz. port tuning isnt a linear function. with one 3" diameter vent, you would only need 4.81" of length. your port area would be 7.069 in^2. that "should" be OK assuming it's an aeroport. thats really driver/power dependant though. [/QUOTE]
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