Krakin Posted August 5, 2014 Report Share Posted August 5, 2014 Krakin, do manufacturers pull t/s data from speakers when they are at room temp or after they are warm? Most manufactures will take a large sample of, or all of the batch, measure them all at room temperature and then go with an average for the listed parameters. Which means that your speaker's parameters could already be pretty different from what you think. 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...
timc31610 Posted August 6, 2014 Report Share Posted August 6, 2014 Krakin, do manufacturers pull t/s data from speakers when they are at room temp or after they are warm? Most manufactures will take a large sample of, or all of the batch, measure them all at room temperature and then go with an average for the listed parameters. Which means that your speaker's parameters could already be pretty different from what you think. Doesn't that make most of our efforts in designing the perfect box kind of pointless? Or is +- a few % here and there not a big issue? My Build Log 94 Civic http://www.stevemeadedesigns.com/board/topic/188644-94-civic-4-door-build-loq-suggestions-wanted-will-be-super-slow-mo/ Faceebook reluctantly Link to comment Share on other sites More sharing options...
Krakin Posted August 6, 2014 Report Share Posted August 6, 2014 Most speakers in the same line should be close together, so you shouldn't disregard them. But if you care and have the knowledge of what to do with them then get yourself a measurement tool. You're not going to get something like one speaker with an Fs of 28 and another with 40. 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...
timc31610 Posted August 6, 2014 Report Share Posted August 6, 2014 Thanks Krakin, sorry to have sidetracked the thread a little. My Build Log 94 Civic http://www.stevemeadedesigns.com/board/topic/188644-94-civic-4-door-build-loq-suggestions-wanted-will-be-super-slow-mo/ Faceebook reluctantly Link to comment Share on other sites More sharing options...
fecupe2001 Posted August 9, 2014 Report Share Posted August 9, 2014 such a nice topic I´m the SPL Gains topic creator!! wanna get louder?? check this: SPL Gains. Panamenian 2009 & 2010 & 2014 Bass Race 149.9 Champion! 2 15" subs and a 2K wired at 1 ohm, http://www.stevemeadedesigns.com/board/topic/167788-fecupe2001-2-15s-on-a-2k-video-on-page-3/ 8 Massive 15" subs and small power, http://www.stevemeadedesigns.com/board/topic/179296-fecupe2001s-8-15s-4th-order-bandpass-wall/ Link to comment Share on other sites More sharing options...
Smoove Posted August 13, 2014 Report Share Posted August 13, 2014 Great thread. 2 Team Fi 15's v1 2 DD M5's 970amps of Alt 6th order blowthroughThe truck Blowthrough build : http://www.stevemeadedesigns.com/board/topic/155555-smooves-1996-chevy-ext-cab-c1500-slow-build/The 350z build : http://www.stevemeadedesigns.com/board/topic/170694-smooves-2003-nissan-350z/ My FB page https://www.facebook.com/pages/Smooves-Car-Audio-and-performance/719746144805343 Team Fi Audio http://www.ficaraudio.com/ Link to comment Share on other sites More sharing options...
-X-RaTeD- Posted August 14, 2014 Report Share Posted August 14, 2014 i cant really understand why someone would purposely get aero ports, just so they could use less port area. aero ports are just crazy efficient, and purposely using them just to go with less port area seems like you are completely defeating the entire purpose of them. spend lots of money on a nice port, and completely defeat its purpose. I have to say that honestly I saw this is a good benefit, but not the go-to reason to go aero over slot. My biggest thing was that the whole box would/could be smaller and get the same tuning. I remember one of my first L-port box specs that I posted for constructive criticism, the first few comments where "dude, you need way more port area per foot...you want to stay between 12-18". Basically finding a balance between not having them too small to the point where you have resistance/noise, but not too big where you loose cone control. Are you saying here that it wouldn't be such a bad idea to use the same amount of port area for aero's as you would for slots? If not, how much would be too little, and what would be considered too much? When I hear music, I fear no danger. I am invulnerable. I see no foe. I am related to the earliest times, and to the latest. ~Henry David Thoreau Link to comment Share on other sites More sharing options...
Jimcat Posted September 2, 2014 Report Share Posted September 2, 2014 nice post still a little lost but going to go flared aeroport for my box Link to comment Share on other sites More sharing options...
lightfoot Posted September 24, 2014 Report Share Posted September 24, 2014 What determines the frequency of a port. Is it the total port area or the length of the port? For example if I have a port that is 28 sq." x 16" will that be tuned higher or lower than a port that is 28 sq." x 24. The reason I ask is because I often see people on here with a box made to the t/s perimeters of one sub then they drop a different sub in the same box without redoing (re tuning) the port . Or some says my box is tuned to 35 hz. wouldn't that be determined by the actual sub that they are going to be using? Link to comment Share on other sites More sharing options...
Krakin Posted September 24, 2014 Report Share Posted September 24, 2014 What determines the frequency of a port. Is it the total port area or the length of the port? For example if I have a port that is 28 sq." x 16" will that be tuned higher or lower than a port that is 28 sq." x 24. The reason I ask is because I often see people on here with a box made to the t/s perimeters of one sub then they drop a different sub in the same box without redoing (re tuning) the port . Or some says my box is tuned to 35 hz. wouldn't that be determined by the actual sub that they are going to be using? Area of the port, volume of the box and length of the port determine the tuning of the box. Larger area = Higher Tuning Smaller box = Higher Tuning Shorter port = Higher Tuning Smaller area = Lower Tuning Larger box = Lower Tuning Longer port = Lower Tuning 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...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.