Krakin Posted July 9, 2014 Report Posted July 9, 2014 You need two more ports and you need to account for the displacement for the ports. You won't have 3ft3 of airspace after installing the ports. 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.
DatDude619 Posted July 9, 2014 Author Report Posted July 9, 2014 Iv never seen 8 ports for 2 15's. Not saying your wrong just seems odd to need 4 ports for 1 sub. My current box is at 38htz with 2 4x7 ports but either way thank you for the help
Krakin Posted July 9, 2014 Report Posted July 9, 2014 You need around 50 square inches of port for each sub. If you use 4" ports it will take that many. 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.
DatDude619 Posted July 9, 2014 Author Report Posted July 9, 2014 What are my other options when it comes to sizes and lengths. I don't mind the port out the box a little if needed
Krakin Posted July 9, 2014 Report Posted July 9, 2014 Just do basic math to find the area of shapes to 50 square inches. If you get 50 square inches you will need all the ports to be 40 inches long. 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.
alaskanzx5 Posted July 9, 2014 Report Posted July 9, 2014 10" port and something like 20-30" long all external. sonotube/concrete forming tubes can be used for that. oh and don't separate the chambers, you will gain a slight amount of volume. t1500bdcp 2 t2d4 15" 1 t600.4 1 t400.2 1 set p1 tweets singer alt, tons of wiring, smd vm-1, 80prs, back seat delete, still in the works, aiming for a 145-147 with the ability to play 25hz up to 50hz.
Krakin Posted July 9, 2014 Report Posted July 9, 2014 10" port and something like 20-30" long all external. sonotube/concrete forming tubes can be used for that. oh and don't separate the chambers, you will gain a slight amount of volume. If he does 10" ports that is 57% more area he needs and will require a lot longer port for it to be tuned to 32 Hz, around 60" long if all of it was external... 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.
alaskanzx5 Posted July 9, 2014 Report Posted July 9, 2014 One 10" port with a good 1" round over bit in a 6-6.25cuft net box would do. Rockford recommends 1 6" port per. A single 10" port exceeds Rockford's recommendation. t1500bdcp 2 t2d4 15" 1 t600.4 1 t400.2 1 set p1 tweets singer alt, tons of wiring, smd vm-1, 80prs, back seat delete, still in the works, aiming for a 145-147 with the ability to play 25hz up to 50hz.
Krakin Posted July 9, 2014 Report Posted July 9, 2014 You do realize that each sub is in its own chamber, right? He can't even do it anyway. Also, when I said it would be 60" long that would be 1 10" for a single 3 cube chamber. 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.
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