jcarter1885 Posted September 4, 2015 Report Posted September 4, 2015 I made a box which I thought would be tuned to 34 and doesn't play very low, is this normal Also what is playing very low to you? Nav-TV Zen V Audio Interface AudioControl DM-608 (2) Stevens Audio Neo-Comp Full-Size Horns (4) Faital Pro 6PR160 6.5" AudioControl LC-6.1200 (1) Fi Neo 4.7 15" D2 in 3.74 Cubic Feet @ 27.70 Hz Ampere Audio AA3800.1 Odyssey ODP-AGM48 Battery (Starting) Odyssey ODX-AGM31 Battery (Trunk) Big 3 - 2\0 Welding Cable, KnuKonceptz Speaker Wire & 1/0 Power Cable, NVX RCAs, Second Skin (Speaker Tweaker Pads, Damplifier Pro Mat), Diode Dynamics LEDs
mcfalcon Posted September 26, 2015 Report Posted September 26, 2015 Bump for a good thread. Just read through it and felt it deserved a bump. Still learning but have started gathering.
Patrick Bateman Posted March 27, 2016 Report Posted March 27, 2016 If you want an efficient port, just make the entire enclosure a port:
AJFrrranklin Posted April 21, 2016 Report Posted April 21, 2016 Great thread, really helping me figure how to build a box with the right port just a quick question. When building a box does the area inside the port count towards the total cubic ft? So I am building a box to for two pioneer champion series pros 12". Specs for the box so far are 3 cubic ft tuned to 35hz with a 8.5 inch port diameter. It says that vent length needs to be 35 inches? Is this right? Just a 18 yr old kid looking to learn more about car audio.
Krakin Posted April 21, 2016 Report Posted April 21, 2016 Great thread, really helping me figure how to build a box with the right port just a quick question. When building a box does the area inside the port count towards the total cubic ft? So I am building a box to for two pioneer champion series pros 12". Specs for the box so far are 3 cubic ft tuned to 35hz with a 8.5 inch port diameter. It says that vent length needs to be 35 inches? Is this right? The volume of the air inside of the port does not count towards the airspace that needs to be allotted for the driver. In your example the 1.15 cubic feet of airspace in the port will not count towards to the 3 cubic feet needed for your driver. So to clarify your total volume of your box would be 4.15 cubic feet with only the 3 cubic feet left over counting towards your driver airspace. 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.
AJFrrranklin Posted April 21, 2016 Report Posted April 21, 2016 So do those numbers seem correct? Can you view the image? It says the vent length has to be 35 inches? How would I do that when my box is only 3 cubic feet? I can upload a 3D image tomorrow Just a 18 yr old kid looking to learn more about car audio.
ckeeler11 Posted April 21, 2016 Report Posted April 21, 2016 So do those numbers seem correct? Can you view the image? It says the vent length has to be 35 inches? How would I do that when my box is only 3 cubic feet? I can upload a 3D image tomorrow Cant see the image but the bigger the port the longer it gets. its a trade off. that's why alot of people use slot ports you can wrap it around the box easier.
island boyeee Posted September 7, 2016 Report Posted September 7, 2016 Might have to try out these aero ports on my next box... So, when designing in say WinISD, and you calculate everything using a cylindrical port, does the flare affect the effective length of the port? Do you just measure port length from the end of each flare?
daimer Posted September 7, 2016 Report Posted September 7, 2016 The effective length is measured with half the flare, but it won't be a drastic change even if you calculate it full length. My humble build log: http://www.stevemeadedesigns.com/board/topic/192602-corsa-b-daily-build-with-12-ground-zero-new-box-in/ Single Zv4 Rev.2 15" on a 10k amp: http://www.stevemeadedesigns.com/board/topic/201434-my-reviewtest-of-the-zv4-rev2-15/
island boyeee Posted September 7, 2016 Report Posted September 7, 2016 The effective length is measured with half the flare, but it won't be a drastic change even if you calculate it full length. I figured as much on both accounts. Thank you for the reply.
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