Dude2800 Posted March 6, 2014 Author Report Share Posted March 6, 2014 science is fun until you put it on the meter and go, wow, i was wrong.If somebody has a meter, please test this. Anybody? Link to comment Share on other sites More sharing options...
Dude2800 Posted March 6, 2014 Author Report Share Posted March 6, 2014 I watched the video and will have to try it out. I do have a question though, with no cone movement how would it move any air?Which is kinda the question I'm asking. Is there stress on the surround and spider even though it doesn't look like it? When you try it and your cone isn't moving. Check the port. There is air moving. Link to comment Share on other sites More sharing options...
97Jetta1637 Posted March 6, 2014 Report Share Posted March 6, 2014 science is fun until you put it on the meter and go, wow, i was wrong.If somebody has a meter, please test this. Anybody? lol, "please test this" this has been tested, proved, corfirmed, and drilled into the brain of every competitor that has ever competed on the TL since it came out in 2001. this isn't a debate or argument, that's a fact. #teamihop Two 12 inch DC XL's Carbon Fiber Cap Stetsom 7k Shell of box / baffle built by me Port / sealing the box by John Hone Fuck midrange Alpine-9886 http://www.stevemeadedesigns.com/board/topic/177428-97jettas-sql-trunk-wall-loudest-99-buick-century-custom-with-a-one-legged-owner/ price has no influence on how something sounds I told him to move the fucking port. they see me hoppin they stoppin they can't believe im so white and dirty It looks like you got so drunk, that someone came up and stole your leg. Link to comment Share on other sites More sharing options...
Krakin Posted March 6, 2014 Report Share Posted March 6, 2014 **For the images below the driver is on top and the port or PR is on bottom. Due to the mass of the air inside of the enclosure and the port, or a passive radiator for that matter, can't react instantly to the pressure created by the active driver. Above the enclosures resonance frequency it is too slow to take away any energy from the drivers, and does almost nothing, refusing to move when the direction of force changes too fast. At the resonance frequency of the enclosure it begins to suck so much energy so forcefully through the internal pressure, that it is loading the driver in use. The cone of the driver then becomes the fulcrum to bear all the force from its own acceleration, which in turn limits the active driver's excursion. Below the second resonance, or tuning frequency, the reflex of the system backs off from loading the driver. Since it is only venting back-pressure from the driver it is acting no more than a hole in the baffle, which in turn causes cancellation with the speaker's front output. This in turn rolls off the output at an insane 24 dB/octave, or 200 times less output every 1/2 of the last frequency. The port also no longer limits excursion or suspension that would normally be provided at or above resonance. This can easily cause the driver to bottom out, or smack against the t-yoke. 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...
Seymore Posted March 6, 2014 Report Share Posted March 6, 2014 **For the images below the driver is on top and the port or PR is on bottom. Due to the mass of the air inside of the enclosure and the port, or a passive radiator for that matter, can't react instantly to the pressure created by the active driver. Above the enclosures resonance frequency it is too slow to take away any energy from the drivers, and does almost nothing, refusing to move when the direction of force changes too fast. At the resonance frequency of the enclosure it begins to suck so much energy so forcefully through the internal pressure, that it is loading the driver in use. The cone of the driver then becomes the fulcrum to bear all the force from its own acceleration, which in turn limits the active driver's excursion. Below the second resonance, or tuning frequency, the reflex of the system backs off from loading the driver. Since it is only venting back-pressure from the driver it is acting no more than a hole in the baffle, which in turn causes cancellation with the speaker's front output. This in turn rolls off the output at an insane 24 dB/octave, or 200 times less output every 1/2 of the last frequency. The port also no longer limits excursion or suspension that would normally be provided at or above resonance. This can easily cause the driver to bottom out, or smack against the t-yoke. this makes so much sense i love you 2001 Civic LX SedanPioneer DEH-7500HD Big 3 in 1/0 Knu CCARockford P500-4RF Punch P165-S in doorsRF Punch P165 in rear deckFront doors deadened with DamplifierNextSQ's new HDS208 8" in a T-line whenever it FINALLY COMES OUT I CAN FINALLY AFFORD IT Bend over and I'll show ya. how is it 2 days work? half a day at most, i may be an idiot, but im not an idiot. Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted March 6, 2014 Report Share Posted March 6, 2014 exactly. ear-o-meters and apps on your phone are not correct. so this whole, well the sub isn't moving it's loudest, bs is just that, bs. I don't understand what you think is BS here, you don't think the technique in the video is going to give you an accurate idea of what the enclosure tuning is? "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds: Link to comment Share on other sites More sharing options...
97Jetta1637 Posted March 6, 2014 Report Share Posted March 6, 2014 exactly. ear-o-meters and apps on your phone are not correct. so this whole, well the sub isn't moving it's loudest, bs is just that, bs. I don't understand what you think is BS here, you don't think the technique in the video is going to give you an accurate idea of what the enclosure tuning is? i'm sorry, i don't build a box with not knowing what my enclosure is tuned to, i'm not dumb. #teamihop Two 12 inch DC XL's Carbon Fiber Cap Stetsom 7k Shell of box / baffle built by me Port / sealing the box by John Hone Fuck midrange Alpine-9886 http://www.stevemeadedesigns.com/board/topic/177428-97jettas-sql-trunk-wall-loudest-99-buick-century-custom-with-a-one-legged-owner/ price has no influence on how something sounds I told him to move the fucking port. they see me hoppin they stoppin they can't believe im so white and dirty It looks like you got so drunk, that someone came up and stole your leg. Link to comment Share on other sites More sharing options...
Krakin Posted March 6, 2014 Report Share Posted March 6, 2014 exactly. ear-o-meters and apps on your phone are not correct. so this whole, well the sub isn't moving it's loudest, bs is just that, bs. I don't understand what you think is BS here, you don't think the technique in the video is going to give you an accurate idea of what the enclosure tuning is? i'm sorry, i don't build a box with not knowing what my enclosure is tuned to, i'm not dumb. No one called you dumb... You are however making yourself look dumb. 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...
Dude2800 Posted March 6, 2014 Author Report Share Posted March 6, 2014 I've got to get a termlab. Link to comment Share on other sites More sharing options...
97Jetta1637 Posted March 6, 2014 Report Share Posted March 6, 2014 exactly. ear-o-meters and apps on your phone are not correct. so this whole, well the sub isn't moving it's loudest, bs is just that, bs. I don't understand what you think is BS here, you don't think the technique in the video is going to give you an accurate idea of what the enclosure tuning is? i'm sorry, i don't build a box with not knowing what my enclosure is tuned to, i'm not dumb. No one called you dumb... You are however making yourself look dumb. elaborate? because i garauntee you if you go, well my sub moves the least at 34 hz, that must be my tuning. you're incorrect. the enclosure doesn't ~have~ a tuning, ever put it in a different vehicle and notice it changed the sound? that's because it's based on your vehicle, what your vehicle is peaking at is your tuning. you can't control that unless you modify the vehicle, build different boxes, and try different combinations. it's not hard, it's not science, it's fact. so please, try again. #teamihop Two 12 inch DC XL's Carbon Fiber Cap Stetsom 7k Shell of box / baffle built by me Port / sealing the box by John Hone Fuck midrange Alpine-9886 http://www.stevemeadedesigns.com/board/topic/177428-97jettas-sql-trunk-wall-loudest-99-buick-century-custom-with-a-one-legged-owner/ price has no influence on how something sounds I told him to move the fucking port. they see me hoppin they stoppin they can't believe im so white and dirty It looks like you got so drunk, that someone came up and stole your leg. Link to comment Share on other sites More sharing options...
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