SPL & SQ / Fabrication

so i used the re calculator and designed a new box for my r.f. power hx2 15. now what im wondering is when i add bracing will that affect my tuning? and how should i do the bracing?

Box numbers i got off of the RE Audio box calc. I put in the measurements from my trunk and this is what i got out of it. 2004 mitsubishi lancer ralliart, mtx 1501d, ssa xcon 15. sub facing rear, port facing rear. square vent style port width 28.5 box height 16.5 top 22 bottom 24.5 wood thickness .75 mdf braced and reseined port height 15 port width 4 porth length 1 is 18.5 porth length 2 is 12 total port length 37.25 porth diameter is 8.74 square port area 60 sq port internal volumbe 2235 sq port volume displaced 2257.31 box volume ft3 3.79 box volum in3 6551.43 tuned freq is 31.24 is that to low of a tune for a daily spl setup, something the wifey can listen to when …

I just finished my box for my fi btl and now I'm looking for something to cover it but not sure what yet. I've looked at CF and Carpet together (having the entire box black carpet with the fi bomb sticker as a cutout with CF over top) and thought about bed liner but I've never tired either and I'm not sue what would be the best look and if there are any more ideas out there throw them at me in open to anything.

I need helping figuring out how to go about getting 6.5s in the doors of my 86 GMC Sonoma. As some of you might know that S Series trucks (S15s and S10s) around that year didn't come with door speakers from the factory, only dash and back panels. I never fiberglassed before so if possible i would like to stay away from that.. but if i must i will take on the challenge, if i could get away with just putting a sheet of MDF on the door and cut holes for my 6.5s that would be great.. but i don't think there is enough space between the door and where the MDF would sit because there was no speaker in before hand so GMC didn't give it the room for speakers so somehow i have to m…

my subs are going to be upfiring (towards roof), would it sound best to have the port facing the rear of car? or facing roof (same direction as subs)? Or does it even matter? This is going in a 2door jeep wrangler. Thanks

The title says it all. How much space should I have between my port and rear wall? My port will have a 9,5" x 20.5" surface area, the enclosure is 20 cu.ft., I will be using two Fi Q 18" powered by a Hifonics XX Colossus II amplifier that will deliver about 3000W rms. The reason I ask is that I don't have enough room for the tuning I want, so I want to make it as close to the intended tuning as possible. I was thinking that 8" will be enough if I make the end flared and the wall "pointy" to reduce turbulence. Would this be enough? Picture of how I was thinking about making the enclosure:

Okay so i'm planning on having a box built for 2 12"s and having the subs face the roof (see pic) I'm wondering if I have a top piece of wood above the subs, how that would affect the sound? The top piece of wood would be above the subs by a couple inches. This would allow me to put stuff on my box for storage (ex: my backpack...) Does this make sense?

Ill have a FI 18 Q here tomarrow , it calls for 6 to 10 cuft box . I have a 94 gmc sonoma ext cab , there will be no back seats . Ill mounts the amps in the back of the seats and one on the roof for the 32 clarion i have ( going in the bed ) . Ive measured out the the box to take up the back 53/23/25 and it comes out to 17 + cuft . What will be the con's or pro's of a box bigger than called for ?

I have a 2003 Jeep GCL and i am wondering if I can fit 2 21 inch Wardens in the rear storage area, a ported box would be optimal. I am just unsure if I have enough volume in order to fit the box. If anyone has any experience with the storage capacity of a jeep please help out.

Help Please. I want to build a ported box for 4 FI 15" BTL's Currently I have a 9 Cuft box with 2 FI 15" BTL's. Each sub in it's own enclosure. FI suggests 3-5 Cuft per sub. Can I make just one box for all 4 with one port? Or do I make a box that seperates all 4 or two? I like the sound with 4.5 Cuft per sub. I am also lost on the port area if I make one 18 Cuft box for all 4. Really appreciate your suggestions here. Thanks, JR

I don't want to upset anyone by saying I'm looking for an SQ setup if I'm actually looking for SPL, so I'm hoping someone can steer me in the right direction. I don't like mainstream rap music, and I don't ever plan on getting my setup metered or compete, so big dB numbers arent a concern. I listen to mostly underground hip hop and a little bit of rock, like 80s metallica/slayer, so hardly any of the songs I listen to dip into the really low frequency range. I'm running 2 audiobahns in a sealed box at about 2.7cf, and because of their design, they are incredibly cramped in my enclosure (go into WinISD and look up the Audiobahn AW1251 and let it select the optimum sealed b…

i have been killin myself trying to figure out a box design for my ranger and have gotten nowhere with it. i got a couple reply's on other forums but nothing set in stone. the sub is a 15"btl and my dem are 50" wide x 16 tall x 16 deep, 5.9cf before sub displacement and port displacement. i need it to have ports on both sides of the sub cause i want the sub in the center of the box (its that way to even out the weight in the truck). i would like it tuned to around 33-34hz.. any help on figuring my port length would be great. please put in laymans terms cause i am not very bright when it comes to this kinda stuff. any help would be greatly appreciated, thanks btw the sub…

I plan on building a box in the near future. Which of these would be best to build with and if there is any sound difference between them? Thanks, Matt Cusack

Hello my fellow SSA dudes, I'm looking to get a blow through bandpass design for 2 18" fully loaded BTL's. My truck is a 1986 GMC S15 and i will be powering them with 2 AQ2200. (if i can fit more BTLs lets do it!) Dimensions: Front to back - 6ft (72 inches) Left to right - 4ft 10inches (58 inches) Tailgate opening - 4ft 3inches (58 inches) Up and down - 1ft 3inches (15 inches) Wheel well to wheel well - 3ft 3inches (39 inches) Thanks Dom. P.S. (To my fellow SSA dudes) - sorry again you have to see my threads about this subject.. just trying to get some help!

I will be soon upgrading my current sub and box setup in my F250. I am limited on space and think I can go 1.5cu without much issue or maybe even up to 2.cu if I add an extension piece. My goal here louder deeper harder hitting setup. Here is a pic of the space I can work with and my current box. 1 10in Fosgate p2 in .53 sealed. I can easily double the size of the current box or I can make almost like a L shaped box to utilize the lower section behind the pass side. Without using the the lower pass side I think I could do one that is (17in H.. 33in W.... 5in D1.....8in D2) this would be outside diameter and I will be using 3/4 MDF. This should be about perfect for o…

i am looking to build a wall in my envoy.... it will be a 4 15 woofer setup and i need a minimum of 16 cubes to make it epic..... what type of port do i need and i would like it to be tuned to about 38 hz but i mainly listen to rap so i am considering 32 hz as well...thank you

Will using 2 ports work or will my tuning be off? I'm going to be running a Fi BTL 18 in a 6 cube box and want to run 2 ports, one firing left, and one firing right. as long as I have the same area and length would I be OK?

I'm currently thinking about building a box for a 12 btl with both the sub and the port aimed into the cabin, sealing off the trunk from the cabin. I have looked at tons of boxes doing this but they all port on either the right or left side of the box. I often have 4 people in my car so this would mean the seats would have to remain up giving the port very little room to breath. My middle seat has an arm rest that comes down and my idea was to have the box port right there so that i can just put the arm rest down and give the port a place to breath. My question is can i port the box in the middle and place the sub to either the right or left of the port. I don't have a i…

Enclosure for 12 FI BL Just wanted to see if anyone has any opinions on this box setup. 2.2 Cubic feet H x D x W 17" 13.092" 30" It would be 33 hz tuning. With port area of 30.8" . I am using 14 square inches per cubic foot Does this sound about right with my calculations or am I way off? I have the cut sheets written down but not sure if its needed in this post.

this is ALTONS post "FYI the box is EXACTLY in the middle of the specs Fi gives for the 12" Q's. Fi recommends 1.8 to 2.4cuft as optimal for a 12" Q, 3.6 to 4.8 for two obviously. If you notice the notes I specifically mention 4.2cuft NET which means before displacements, there's nothing wrong with the space I've given for the Q's." and i STEALTH said "actually net means after displacements. gross is before. lol" ALTON said "taken directly from the dictionary buddy: gross    /groʊs/ Show Spelled [grohs] Show IPA adjective,-er, -est, noun,pluralgross for 11, gross·es for 12, 13; verb –adjective1.without deductions; total, as the amount of sales, salary, profit, etc., be…

I have never built a box for a sub before, and now I am going to be building one for a 8" Kicker L7. This is going to be put into a Jeep TJ, so it does NOT have much trunk space at all. I am not too worried about the size of the box, because I can dimension it to the size of the trunk myself. What I am worried about and have no clue is how to make the port inside the box. I need to know how much space I need in the port to get the most air. Although it is an 8", I want it to perform the best it can through the box. I am looking on Kicker's website and these are the dimensions it says: Mounting Depth (IN.,CM) 4-3/4, 12.1 Mounting Cutout, Square (IN.,CM) 7-1/4, 18.4 Min Re…

Hi all, A friend of mine has a 15" xcon DVC1 in a 3.7 cu ft box (32 Hz tuning, flared port)Look at my avatar : it's his box !! He uses 2 Sundown saz 1000 d amps strapped to run the sub. Now, he wants another xcon 15 and 1 more saz 1000 (he just bought mine ). Here is the question : What would you do ? Build another same box for the second xcon, or build a new box for 2 xcons ? He is the box builder, so there is no problem to build boxes. What are the pros and cons of your choices ? Thanks for your help !!! (He has room in the car, no backseats, he knows he has to upgrade the electrical system for more than 4000 watts !)

I'm designing a box with the help of the torres box calc and sketchup and was wondering if anyone had any suggestions or if this looks right. I believe I included all necessary dimensions, but if I forgot any let me know. The subs will be mounted on double baffle up top, with rear facing port. Any help/suggestions/comments are appreciated!

Hello. I've got a BTL 12, the new model, with the spl gap, short coil and cooling and I'm looking for some ideas on a box volume I can use for burps and keep it mechanically safe. I had an old 1.3cf box laying around so I used that for some quick testing. The highest score with all testing was only 147dB on 3600w clamped watts. The actual power to the woofer will be a bit over 4000w once I get good battery. The goal is to score 150dB out of this single 12 and the small box is 3dB short. This is how the 1.3cf box looked at the end of the testing: I also tried all combinations of sub / port facing except both of them back. A max volume suggestion would be useful as I …

I have an re sx15d4 in a box that is 2.9 cu ft gross w/2 3" wide 10" long aero ports. I will be running an saz1500d @2 ohms into this sub. I want the best sq I can get from this sub. So I'm looking for box recommendations. Right now I'm looking at building a 4.2 cu ft box tuned to 34 hertz with a slot port facing the back of my jeep and the sub firing up. I used the box calculator to design the box.