SPL & SQ / Fabrication

this is my plan. im building a box that has 4 nightshade 15s. i designed the box on a 3d program to scale. the box is 19.5 cubes. the port is 7inches wide and 38.5 inches tall. that gives me 269.5^2 inches of port area and i need 12-16^2 inches of port area for each cube of airspace. so ill make the port area requirement. the box is tuned to 30hz. i will also be having all the walls 1.5inches thick. everything will be liguid nailed and screwed together.what you guys think? i cant seem to get the pictures to upload. i dont know how to get it from google sketchup to a image hosting site. any help with this?

where did it go!?!?!?

Well, i didnt think this was going to end up happening but i actually saw an Fi BTL N2 18" For $400 in my city. I was previously going to get a 15" Fi Q or BL which was going to cost me $400 shipped anyways so i cant give up this opportunity. Now in the quest for less trunk rattle, i wanted to fire my subwoofers forward into the cabin, BUT i dont have foldable seats. OhJay gave me a good idea. Use external aeroports that go through the rear deck where the 6x9 speakers go. I thought it was a great idea, something a bit different. Now i was wondering if any of you could make it happen. Iv got probably 19 inches maximum of height, probably about 40 inches of width. I…

alright so I will start building a sub box pretty soon but I have an issue, there is a metal brace on the floor of my car going from one side to the other. can I work around it? or does the box have to be flat one all sides?

About to start the new enclosure for my 2 zcon 12s. It will be a trunk wall. I will be trying a 10 inch round port this time. I'm wondering how many cubic feet you guys think I should aim for with the new enclosure? ? Will have an aq3500 at .5 on them but Will be adding another 3500 as soon as I can find another. . Going to be tuning around 33-34. any suggestions?

Today I purchased 2 kicker L7 12s and a rockford fosgate prime 1200. Can someone help me with a design for my 1998 s10 extended cab, my max dimensions are 46" wide, 22" tall, and 13.5" deep would like it tuned @ 33 Hz. Any help is appreciated

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:

so i still havent gotten around to doing a new box for my bro's L7. but im thinking about trying something alittle different. he basicly only wants spl so im thinking about trying a wall... i have to build the box in the trunk anyways so might aswell try something new. its a mercury sable by the way. im thinking 6 cubes net design from the manual or do a tuning around 34hz...? we are prepared to deaden the rear deck, etc. will there be more output from a wall in this car or would it be a waist of time? if we did the 6 without the wall there wont be much of a trunk left anyways... and im sure we can seal the trunk off from the rest of the car effectively.

Ok, so i have the planned dimensions and i need help calculating the port and seeing if this box is ok? Two Alpine type r 12's will go into it facing towards the roof of the vehicle. Length (Depth) = 26" Width = 37" Height = 13" So what should the port calculate to? According to the re box calc. they say the port length is 34.75". Is this correct? I'm usin .75" MDF of course.

If I hsve aeroports half internal half external does the volume of the external portion of the port count towards the internal volume of my box? Also would the surface area of the portion of the port within the box divided by 1728 by the ports displacement? Thanks in advance!

So i've been doing some reading and I'd like to seal the rear vents in my '06 tahoe. I've never worked with sound dampener before but I think that's the best route to go..Any suggestions as to what I need to buy or the best way to do this? Pic of someone elses truck an the vents in question:

I have a FI SSD 15. (bp power, flat coil) I currently have it in a 18x18x38 box tuned to 34-36hz somewhere in there. aprox 4 cubes. Im thinking of building a new box, what should i tune it to, and how many cubes? i find my box has a slight bit of port noise because there are no 45s and it doesnt go as quite low as i want it to. Iv heard other ssd 15's hit harder than mine, so im trying to squeeze every thing i can out of the sub. also with the box the way it is now, what should my Amp be set at? Lowpass and subsonic? If it matters: its going in a crew cab GMC, powered by a AQ1200. thanks, in advance all help is appreciated

So i made a 4th order bandPass for 2 obsidian 12s out of birch. I started sanding the enclosure and filled it all the screw holes sanded all those spots with 60/120/220 grit sand paper everythings smooth(so i thought) i started painting the enclosure with kryole dual primer and paint(spray can) i thought it would be good to use that lol well im pretty stupid to think that was gonna work great. The corners are very dull along wIth the edges that are sanded and the top and sides are super shiny and it looks like shit. Whats a good paint to use to paint birch with and have it turn out super glossy. My goal is to have it very glossy and not be able to see with the edges meet …

Alright well I finally have a new box design for my level 5 15". I just need some help with those of you who have built boxes in very tight situations. I have about an inch on the left and right side to spare and a few inches on top. I cannot build it outside and then toss the box in because my trunk space is too small. Rotating it will be difficult as well.. I have read on here people doing very big boxes in small areas inside their car. Pictures will be posted soon in my build log as well!

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

What I planned on doing is glueing a layer of plexiglass over the top of painted mdf. I want it to dry clear so there will be no glue marks. Is there anything out there that can do this? I have looked and all I could find was plexi to plexi glue. Any finds would be greatly appreciated.

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

I have modeled up a box for a 12" Fi.SSD Now I'd just some of you box builders to just verify what I've done. And let me know if its good or not Here is a pic since they're worth 1000 words: Port and Sub displacement has been accounted for. Where would be the best location on the port side to place the sub? I dont quite understand port loading and such. Thanks in advance

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 wondering how accurate it is or if it is super basic for the noob http://www.accelerator-pedal.com/ported-box.asp

What I HOPE to attain is a great sounding sub stage (I have two SA-8s) that gets REAL low and is real tight. What makes my goal a bit different than most requests is that I don't care about volume (SPL), I will never put a meter on it to check my SPL... I want low extension, and tight bass with very little hump in the response curve (I realize it is nearly impossible to get a flat sound from a ported box). Vehicle : 2013 Jeep Wrangler Unlimited soft top Location in the vehicle: back cargo area Space available (Length x Width x Height): 37.5 x Any x Any Subwoofer make and model: SA-8 V2 Subwoofer Size: 8 inch Number of Subwoofers: 2 Type of Port (Kerfed, Slot, Aero, etc.…

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 …

can someone design me a box for two sundown audio zv.2 15's that will be going in a 04 impala here are the measurements W-35 H-17 D-30 i used the subwoofer calculator on the 12volt and i came up with 8 cubes

Aight, Ive got 2 18" daily Fi BLs dual 1 ohm, with cooling and flatwind option. Then I got a sundown saz-3000d, iraggi alternator, and more 1/0 welding wire than you could shake a stick at. Now I have very limited box building experince, and I know someone that knows someone, that has some experince. But I think he is limited in proper port designing, maybe. He has a shop called 352 Kustomz, small shop, two guys, do some crazy custom stuff. Very skilled in body work. So they start grinding away on my project, Its going to be more of a show box than a performce one. But he keeps on asking me the "port size" recommendation from Fi. I told him 5-10 cubic feet @ 30-37Hz , …

say you have a box with the cuft you want to port it with but this box has a reallly strange shape will that change the port size,length, or anything at all? its going to be for a ssd 12 the box has 2.12 cuft going with a round port