Krakin Posted March 2, 2013 Report Share Posted March 2, 2013 Would like someone to please explain this in further detail. Tried searching for a while and never found a good explanation. This is what I have came out with for 2 SA-10's. 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. Link to comment Share on other sites More sharing options...
ZekeGXP29 Posted March 2, 2013 Report Share Posted March 2, 2013 The only thing I see that may throw your measurements off is the value you have input for port thickness. It appears that you are using a round port, so that value should be significantly less that .75 unless you are making those tubes out of wood/mdf rather than pvc or some other plastic. Link to comment Share on other sites More sharing options...
Krakin Posted March 2, 2013 Author Report Share Posted March 2, 2013 The only thing I see that may throw your measurements off is the value you have input for port thickness. It appears that you are using a round port, so that value should be significantly less that .75 unless you are making those tubes out of wood/mdf rather than pvc or some other plastic. Never even noticed that before.. But yeah that could very well be taking up a lot of unnecessary space. Thanks Edit: messed around with it and didn't change any of the calculations 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. Link to comment Share on other sites More sharing options...
bassfreake Posted March 2, 2013 Report Share Posted March 2, 2013 yea I've never seen where changing the port thickness on an aero port in Torres makes any difference at all Thanks I was pretty excited about the alt myself. kind of like a school girl, in a dress, on a swing. lol It's warming up enough that the donut-punching cyclist douchenozzles are getting their two wheeled fagmobiles out. My Build Log Link to comment Share on other sites More sharing options...
Sonic Posted March 2, 2013 Report Share Posted March 2, 2013 Make the box to have an internal volume of 3 cuft gross, use 2 four inch diameter port 18'' long each. This will yield a box that is 2.5 cuft net, tuned to 35hz. Link to comment Share on other sites More sharing options...
Krakin Posted March 2, 2013 Author Report Share Posted March 2, 2013 Make the box to have an internal volume of 3 cuft gross, use 2 four inch diameter port 18'' long each. This will yield a box that is 2.5 cuft net, tuned to 35hz. It's not the exact dimensions I'll probably use because it's supposed to go behind the seats in a '03 Sierra single cab. 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. Link to comment Share on other sites More sharing options...
Joe X Posted March 2, 2013 Report Share Posted March 2, 2013 A Single 6" will work as well. Link to comment Share on other sites More sharing options...
bassfreake Posted March 2, 2013 Report Share Posted March 2, 2013 A Single 6" will work as well. a single 6 is a little bigger than 2 4s which I'm pretty sure will raise the tune of the box which means he will need a longer port or a bigger box to get the same frequency and port area per foot. if he wants it set the same that is. edit - that being said I would still agree that imo a single 6 would still probably be more optimal just cuz fewer ports is usually thought as better from what I've read. just saying that just simply using a 6" instead of 2 4" won't work out the same unless he also makes changes to the box itself Thanks I was pretty excited about the alt myself. kind of like a school girl, in a dress, on a swing. lol It's warming up enough that the donut-punching cyclist douchenozzles are getting their two wheeled fagmobiles out. My Build Log Link to comment Share on other sites More sharing options...
Krakin Posted March 2, 2013 Author Report Share Posted March 2, 2013 Okay with all those different designs I still come out with 34-35hz tuning, but my main question is the port area per foot. Because that is the only *2 cubes (2) 3" x 12" = 6.77 sq in *2.5 cubes (2) 4" x 18" = 10.20 sq in (1) 6" x 21" = 11.10 sq in. 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. Link to comment Share on other sites More sharing options...
Krakin Posted March 2, 2013 Author Report Share Posted March 2, 2013 A Single 6" will work as well. a single 6 is a little bigger than 2 4s which I'm pretty sure will raise the tune of the box which means he will need a longer port or a bigger box to get the same frequency and port area per foot. if he wants it set the same that is. Made the box 2" longer 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. Link to comment Share on other sites More sharing options...
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