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Message: <blockquote data-quote="IgnoreMe" data-source="post: 3535570" data-attributes="member: 551352">man, all this for a thread that was originally about ports...either way to the OP. the 56% calculation was based on a specific amount of flare radius (i believe it was 1"). you can use devil drivers post over on soundsolutionsaudio.com if you want to see how to calculate the reduction of vent velocity using a specific flare radius.a bigger flare will reduce vent velocity even more, and a smaller will do the opposite. either way, if you're going to use standard aero ports you can get away with about 50-60% less than a slot port. this is a quote i found over at AVS regarding the 6" psp ports. so they do use a about a 1" flare which puts it pretty close to the above math. im using the quote because i have no gotten a chance to play with the psp ports.</blockquote>

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