bkolfo4 Posted June 24, 2014 Report Share Posted June 24, 2014 There is a lot of info and test data in the loudspeaker cookbook on effects under size ports. Not as bad as you would think to a certain point. That is why a smaller port with a flared end that cuts down on port noise still works good. And in a car where things get loud quickly, the port noise is even harder to hear unless you are playing below tuning. Current system: 1997 Blazer - (4) Customer Fi NEO subs with (8) American Bass Elite 2800.1s Previous systems: 2000 Suburban - (4) BTL 15's and (4) IA 40.1's = 157.7 dB at 37 Hz. 1992 Astro Van - (6) BTL 15's and (6) IA 40.1's = 159.7 dB at 43 Hz. Link to comment Share on other sites More sharing options...
gckless Posted June 24, 2014 Author Report Share Posted June 24, 2014 Commenting to read through later, seems very interesting. Too bad we tend to work in a car audio environment where it is next to impossible to achieve what is on paper and then you realize it's audio and 100% correlation does not exist.... No doubt. Paper to real life translates directly less times than it doesn't. But, even though it doesn't match all the time, it's not always bad. Sometimes you get good surprises. I don't know, maybe I'm just trying to get people to think. I would really love to see this tested, would love to see someone test it in a car versus the controlled environment they did. I'm not motivated enough to do it lol. "Clipping" is the biggest forum boner now. It's like witchcraft... it automatically explains just about everything people don't understand. My build log: http://www.stevemeadedesigns.com/board/topic/200295-gckless-2011-chevrolet-impala/ High resolution photos: Gilbert Kless Photography Link to comment Share on other sites More sharing options...
Krakin Posted June 24, 2014 Report Share Posted June 24, 2014 This is why I don't mess with ports in my home audio build. 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 June 24, 2014 Report Share Posted June 24, 2014 Okay now that I've read it, I can thin of numerous times where I would see (mainly on bandpass enclosure) ports where the entire port was half of a PVC pipe. For SPL purposes. 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...
Ninja_v1.0 Posted June 24, 2014 Report Share Posted June 24, 2014 interesting..... whats more interesting is that Terry Brocks just destoryed everything i read by posted the number he did with his huge port. but then again I don't know shit so i stay in the shadows When your at the top everyone is coming for you, friends, family, haters and even those who don't know you.. my advice.. KILL EM ALL Link to comment Share on other sites More sharing options...
Pro7 Posted June 24, 2014 Report Share Posted June 24, 2014 interesting..... whats more interesting is that Terry Brocks just destoryed everything i read by posted the number he did with his huge port. but then again I don't know shit so i stay in the shadows But the paper recommended a large port.. I've gotten a blowjob and picked up my iphone behind her back to see what email notification I got from smd before Link to comment Share on other sites More sharing options...
Bump4life Posted June 24, 2014 Report Share Posted June 24, 2014 interesting..... whats more interesting is that Terry Brocks just destoryed everything i read by posted the number he did with his huge port. but then again I don't know shit so i stay in the shadows that read recommended a large port. but at high spl it did not recommend a huge ext flare whcih he does have. but it also recommends an aero port which makes sense. overall a great read though. I am gunna put a lot of this to test once my meter comes in the mail!! at least I have a large port and a curved port entrance on inside. i left the outside of the port unkerfed and straight though Buyer/Seller Feedback Thread: http://www.stevemead...5015-bump4life/ MB C220 153 Trunk Car Build Log: http://www.stevemead...d/#entry1840136 MB C280 Ipad Dash SQ Build Log: http://www.stevemeadedesigns.com/board/topic/194484-bump4lifes-new-benz-tony-c-relay-kit-pictures-ce-electric-audison-front-stage-installed/ My SPL Log: http://www.stevemead...__fromsearch__1 BMW M340 xDrive Stock, for now. Corner Load 10" maybe soon. But does 10s in the 1/4... Best Scores out of a trunk 153.0 sealed legal full tilt clamped 5524 @ 42 hz 154+ windows down, 155+ kick Link to comment Share on other sites More sharing options...
Bump4life Posted June 24, 2014 Report Share Posted June 24, 2014 great read. A lot of great points in the article. be prepared to think when reading though. and if you have an understanding of calculus it might be slightly easier to understand what they are getting at by interpreting the formulas. Buyer/Seller Feedback Thread: http://www.stevemead...5015-bump4life/ MB C220 153 Trunk Car Build Log: http://www.stevemead...d/#entry1840136 MB C280 Ipad Dash SQ Build Log: http://www.stevemeadedesigns.com/board/topic/194484-bump4lifes-new-benz-tony-c-relay-kit-pictures-ce-electric-audison-front-stage-installed/ My SPL Log: http://www.stevemead...__fromsearch__1 BMW M340 xDrive Stock, for now. Corner Load 10" maybe soon. But does 10s in the 1/4... Best Scores out of a trunk 153.0 sealed legal full tilt clamped 5524 @ 42 hz 154+ windows down, 155+ kick Link to comment Share on other sites More sharing options...
gckless Posted June 24, 2014 Author Report Share Posted June 24, 2014 interesting..... whats more interesting is that Terry Brocks just destoryed everything i read by posted the number he did with his huge port. but then again I don't know shit so i stay in the shadows that read recommended a large port. but at high spl it did not recommend a huge ext flare whcih he does have. but it also recommends an aero port which makes sense. overall a great read though. I am gunna put a lot of this to test once my meter comes in the mail!! at least I have a large port and a curved port entrance on inside. i left the outside of the port unkerfed and straight though This is the main interest of mine from this whole thing. How would a large kerf inside and no kerf outside compare to how everyone does it now, with a large kerf outside and not on the inside? There's definitely logic behind it. Or maybe large kerfs on both? If you do any testing, please mention me wherever you post up! "Clipping" is the biggest forum boner now. It's like witchcraft... it automatically explains just about everything people don't understand. My build log: http://www.stevemeadedesigns.com/board/topic/200295-gckless-2011-chevrolet-impala/ High resolution photos: Gilbert Kless Photography Link to comment Share on other sites More sharing options...
Kyblack76 Posted June 24, 2014 Report Share Posted June 24, 2014 God i hate reading about port stuff... it shows me more and more i may have fucked up.... SMD SUPER SELLER The Burban Build Blazer Build sold Acura trunk build sold Link to comment Share on other sites More sharing options...
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