Guest MegaloManiac Posted November 3, 2006 Report Share Posted November 3, 2006 answer this .... excuse the mispelled words Quote Link to comment Share on other sites More sharing options...
andym85 Posted November 3, 2006 Report Share Posted November 3, 2006 to my knowledge.... to find your port area, it is simply the height*width of the port opening (or pi*r^2 for round ports). the other question, as i interpret it, is about port displacement. this is fuzzy even for me, because i have heard a couple of different answers from many, many people. Answer 1: the blue+pink area volume (l*w*d/1728) is the port displacement to be accounted for. Answer 2: the pieces of wood you actually use to make the port account for port displacement..say the long part of the "L" of the port is 20" and the short part of the "L" of the port is 5". take the wood thickness (typically 3/4") and use that number as width, then plug into the formula...so w*l*d/1728 or .75*l*d/1728...remember this method the measurements are the measurements of the actual wood used to make the port. As far as which of the 2 methods is corret to find port displacement, i am still not 100% sure, but from what i gather from what others are doing...i think answer 1 is more accurate... hope that helps...probably only made it more confusing...lol p.s. i love smd too..lol Quote i likes me some audio stuff... Link to comment Share on other sites More sharing options...
Guest MegaloManiac Posted November 3, 2006 Report Share Posted November 3, 2006 you made it severly confusing now Quote Link to comment Share on other sites More sharing options...
andym85 Posted November 3, 2006 Report Share Posted November 3, 2006 glad i could help..lol. port displacement is wierd...maybe we should start another post addressing this issue. Quote i likes me some audio stuff... Link to comment Share on other sites More sharing options...
Guest MegaloManiac Posted November 3, 2006 Report Share Posted November 3, 2006 cool :^ you do it, cause i got to go get groceries ftl...WalMart Quote Link to comment Share on other sites More sharing options...
David Posted November 4, 2006 Report Share Posted November 4, 2006 I always account for the wood used to make my slot ports. my current box build Im doing for the RedBaron the port is 4 x 31 = 126^2 of port area. the length is 31" so then I calc it with the thickness of the wood example: 4.75 x 31 x 31= 2.6 cubes of port displacement. Quote Link to comment Share on other sites More sharing options...
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