cgallmore Posted December 18, 2013 Report Posted December 18, 2013 Im designing a box for 2 obsidian audio 15s, i looked on the web and didnt really see any thing that helped with port ratio. so far the box i have a 7.88 box 115.50in2 port area 14.65 port area per ft 1:2.36 port ratio
Krakin Posted December 18, 2013 Report Posted December 18, 2013 What are you wanting to tune the box to? Krakin's Home Dipole Project http://www.stevemeadedesigns.com/board/topic/186153-krakins-dipole-project-new-reciever-in-rockford-science/#entry2772370 Krakin, are you some sort of mad scientist? I would have replied earlier, but I was measuring the output of my amp with a yardstick . . . What you hear is not the air pressure variation in itself but what has drawn your attention in the two streams of superimposed air pressure variations at your eardrums An acoustic event has dimensions of Time, Tone, Loudness and Space Everyone learns to render the 3-dimensional localization of sound based on the individual shape of their ears, thus no formula can achieve a definite effect for every listener.
cgallmore Posted December 18, 2013 Author Report Posted December 18, 2013 What are you wanting to tune the box to? for this it is 32 hz. i may be doing a removable port with a lower tuning that this but it will probably be an aero port
Krakin Posted December 18, 2013 Report Posted December 18, 2013 Everything looks good, but when figuring port length, make sure that you use the NET internal volume. If you use gross volume you will build a box that will be way off what you expected. Edit: You could bump up your port area a little bit, but you should be okay with it there. Krakin's Home Dipole Project http://www.stevemeadedesigns.com/board/topic/186153-krakins-dipole-project-new-reciever-in-rockford-science/#entry2772370 Krakin, are you some sort of mad scientist? I would have replied earlier, but I was measuring the output of my amp with a yardstick . . . What you hear is not the air pressure variation in itself but what has drawn your attention in the two streams of superimposed air pressure variations at your eardrums An acoustic event has dimensions of Time, Tone, Loudness and Space Everyone learns to render the 3-dimensional localization of sound based on the individual shape of their ears, thus no formula can achieve a definite effect for every listener.
cgallmore Posted December 18, 2013 Author Report Posted December 18, 2013 Everything looks good, but when figuring port length, make sure that you use the NET internal volume. If you use gross volume you will build a box that will be way off what you expected. okay it is the net volume! i made that mistake with my last box, and i didnt use the number of port walls either so my tuning was off. but i wont make that mistake again lol
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