SPL & SQ / Fabrication

hi i got 2 sa-8 subs and im gona make 1.6 Cubic Feet = 45.3Liters enclosure but i dont know about port can you help to get calculations right with square port

I have a recording studio and have folded horn pa subs and is the loudest and cleanest of all the pa designs. I was wondering if anyone has made a folded horn sub for a car (I've never seen one but maybe I'm ignorant) and the pros and cons. Thanks

A buddy of mine wants me to build him a subwoofer box for two 12's in his Ford Ranger Edge. Now he is taking out all of his rear seats which gives me a good chunk of space to work with. I know how to build and design an enclosure, all i really need to know is subwoofer/port orientation. Havent made an enclosure for a truck like this and I dont have the time to build multiple enclosures and test them all out so I was hoping this could save me some time. -Mike

ok so i woke up today with spl on the mind, i called my local stereo shop that i once worked at, i requested a termlab run, the man told me it had not been used in 4 years, and didnt know how to use it even if it worked, he was worried about the mic, he said that maybe it had to be adjusted, or tuned, i dont know anything about that, but it said it could take weeks, i wanna see where im at on the scale, im also intrested to know where i would be at in SPL class, i have a car with a trunk and thats where the subs are at!.. no none walled, saz 3000d 3 yellow tops and 2 15's and my system sounds better with the windows down... is that outlaw? i dont know much about …

OK, so I've decided to try out a box using round ports for my 18" nightshade, so i can make the ports interchangeable for comps and daily. I'm using a Hifonics Brutus 1600d amp. i figure the box should be about 5 cubes since the amp isn't that powerful and i want to get a lot of output. i want to use 2 6" diameter pieces of PVC. i am going to do some testing to figure out where my port should be tuned at for spl, but my question is that if i want to keep the box at 5 cubes how big should i make it to make sure its still 5 cubes after the displacement of the ports? i have been looking all night trying to figure this out. i found that if my box is 5 cubes i should use 2 6" …

What would be the best idea for tuning a box to a sundown audio x15?

I'm somewhat new to using WINISD and I was wondering why there is no SPL increase when a larger area port is used. Although I understand that if the enclosures are tuned to the same frequency their relative resistance is the same but it just seems like a larger port would yeild more spl (in the same fashion horns get really loud). Can anyone clear this up for me. I'm not asking about beligerently small port areas but lets say the diff between a 20sq. inch port and a 50. Same sub, box, tuning etc. Your answer doesn't need to include stuff I have already read in the thread about vortexes and air resistance. (but then again perhaps I missed something) Thanks, b

I know it's a long ways from anywhere, but if you happen to be close by.....come bump w/ us!

Ok I had to do an l-port and It is 6"H so I marked all the way around the L at 3" in the middle and from front around I have got 22" but all the box calculated says phical port it 16" so is my port 22" or 16"?

I KNOW THIS DOESNT HAVE ANYTHING TO DO WITH THIS FORUM BUT PLEASE HERE ME OUT AND ANSWER THIS!!! I'm holding off on the 4 BTL's just for now until I get my money right but for now I want to know if this is a good setup? I plan on buying 5 of these (To Save Space) http://www.sonicelectronix.com/item_3835_Kicker+05C84.html This amp for subs http://www.sonicelectronix.com/item_9551_H...+TXi+1008D.html The box is going to be custom made (To fit the trunk) (Ported) maybe tuned to 27 Hz.,is 27 Hz. loud or should I tune lower? And its going in a 2004 Chevy Aveo. Im going to parallel wire the 4 ohm subs to 2 ohms. For a educated guess do you think I'll be hitting @ leats 140db? I…

going in my 86 towncar. trying to use only the lower part of the trunk for box which measures 44"L 28"W........... as for depth i can go w/ 17" (would be flush w/ upper back part of my trunk, where the spare would go), or i can go up to 20"D. subs up and vent/port up. can be either single chamber 1 port (whatever side) or seperate chambered t ported. give me some ideas w/ design and tuning. thank you.

I was wondering what the consequences of running 16v in a daily driver car would be. I know the car is designed for 12v, so it probably wouldn't like it. I was just wondering if it would cause damage to the car's electrical components. <--I like that smilie

I remember reading somewhere about the relationship between a box's port area and potential output. The reason i ask is i have been looking at the IXL drivers from Mach 5 and in order to tune low in such small boxes the port needs to be quite large in order to avoid port noise. I was looking at a 2cf box with a fairly large port (roughly 50 inches) my question is will such a large port casue a loss in output? i was looking at tuning at 30Hz for a daily setup that would hammer out the lows. Is there a general rule of thumb regarding port size compaired with box volume? Could someone point me in the right direction (i haved tried to search) I was hoping some of the experie…

it was hot & Hummid --- w/ 2 dead batterys got a 148.1db all i needed was 2 points to go to finals so i am in there

just wondering what you guys felt about attaching things like felt or sound foam, (seen a few designs on DIY like this) for SQ purposes, not SPL ofcourse, but for less vibraton and harmonics, etc...

Last 4 years and last 7 boxes I have all used slot ports. I have never even looked into aeros before so I got a few questions and would like some support on what others have told me about them. As of right now I am using the torez calculator to try to help me with this. The box Im designing is for a 21 warden, I would like to have 115+ sq in of port for it tuned to low 30s. I have been told that flared ports somehow equal a bigger straight port, example I was told that a 6in flare would equal a 9in straight port. Im guessing the torez calculator goes by straight ports that are not flared. I am getting confused with all the diff info I have been given and would like any ki…

I recently took my two 12's and put them in a prefab box built to hold two subs. Its a camaro box so it's wierd. I put them in that box because I had two single boxes for the subs and one was leaking real bad. Anyway, MY question is, how come they hit harder in the two single boxes than they do in the dual box? I think it might be because the box is too big. So is there anyway I can fix that? I seen a box another person had and he had it stuffed somewhat with newspaper? Would that help the subs hit harder in the dual box? Thanks ~MadroX

i have my cart full and about ready to order in the next few days so what I need to know since ssa store does not carry fuses what website do all of you order your fiuses from

Just checking pricing on various different places. What places do you guys use for your resin/matte/cloth?

I was just wondering how much space between the end of the driver to the wall of the enclosure is sufficient? Meaning what wont hurt the driver or sq/ spl. I'm thinking of a 15" havoc ported. The xmax spec is 30 mm if that matters. Thanks in advance and merry Christmas to all.

I'm going to be putting together a new box this weekend for a 10'' BL in my reg cab ranger. First off, the box will be 1.6@36-37 with (2) 3'' aeroports (Fi recommends 1.25). Will I run into any problems with having the box larger than optimal size? How should I put my ports? Here's the space I'm working with: Option 1: Option 2: Option 3:

I have 1 PSI P1 15" sub in a 4.5 cubic foot ported enclosure. I have a 6" diameter aero port that is 10.5" long. My box is a 6 sided wedge design and we are trying to figure out where to place the port. I have a 2010 Hyundai Accent Hatchback and my box is in the very back. Here are my 2 options. Option 1: Port on top of box next to the sub. Option 2: Port in front of the box on the angle. If the port is placed in front it will be a few inches from the back of the seat with the seat up. If it's placed on top it will always be in open space. I would rather it in the front so i can blow more air towards the passengers but i dont want the seat to interfere with the sound qual…

Looking for ideas based on experience! My shop has a 1998 Chevy extended cab being used for SPL competing in USACI Modified. We will be using four AddictiveAudio V4 15" woofers with roughly 12,000 watts rms. My question is how should the enclosure be built for max spl? Just looking for ideas here.. we are stuck at 157.6 db on the term-lab at drivers kickpanel.

the vb part is the part that needs clearing up.... Vb= net internal volume of the box, correct? if that is the case, how is it written into the formula as square inches? bigger_george is building an enclosure for his rl-p 15's and needs to be able to calculate port length...however, he needs to plug in the Vb and he's trying to use square inches... here's the thread <-----click this link... so, which is right? i say Vb is supposed to be in cubic not square inches correct? wheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

So this weekend I'm going to purchase another battery and start working on a battery rack\holder for the rear cargo area of my tahoe. I'll be running one battery there, but eventually I'll add more...A couple questions.. 1. Should I use wood to construct it? I heard MDF flexes over time? Would I be better off getting a friend who can weld to come up with something with metal? 2. It should probably be secured to something, right? I'm not sure if I want to start drilling a bunch of holes in the truck...Any ideas? 3. What are the max dimensions of a group 31 battery? 4. Anyone have any pictures of their battery setup and how it's secured? Thanks.