The best thing to do is to graph it (for air port velocity) and take a look at the graph to see if port noise will be present. Not going by a 12:1 ratio. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gifI see your point marco.. height to width of the port ratio.... So for it to be 40" wide.. it would need to be roughly 3.3" tall?
