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SPL & SQ / Fabrication

Calculations, Concepts, Designs, Theories. All General SPL Or SQ Questions Can Be Discussed Here.

  1. Started by elemen0hpey3ae,

    First post, Please bare with me. I did a search but didn't find what I was looking for. 2005 Ram 1500 Quad Cab My truck is all set-up with highs, deck, EQ, Kicker ZX.1000 amp (~1150W @ 2ohms). Looking to run a 12" BL Dual 1Ohm. I listen to mostly rap and hard rock, looking for a good box for the daily driver, I'd say mostly rap, real deep lows but I'd still like to hear the kick drums. I've never built a custom box before; I'm looking at 2.0 ft3 slot ported box @ 32hz. Will this limit the sub from reaching its full potential? The amp puts out real good clean power, I'd like the best possible box for my truck. Are there any pre-built boxes that will work well with …

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    • 4 replies
    • 827 views
  2. Started by CUBANO,

    First off, hi...i just joined... I'm a complete audio noob... I'm looking to build a console/sub box for my 2007 Silverado... Its a reg cab with hardly any space behind the seats...so i want to take out my jump seat and build something... Here are the plans i sketched up... I basically want it to extend all the way to the dash... have a cup holder... and have the sub in the back, out of sight.... I will put a arm pad on top to rest my elbow... I'm not trying to beat this box out the frame or have a super loud setup.... I'm looking for looks/functionality/and bass to complete my setup...... Any criticism is appreciated....any thoughts or ideas let me know..... I don't k…

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    • 8 replies
    • 780 views
  3. Started by solobaric_kid,

    so ive built a few boxes before an they were simple an nothing special so i use a box calculater that i no longer have( computer crashed)! so im trying to build a box for this 15 btl fl to go in the hatch back of my 1982 mustang! i found a new box tuning calculater (torres) from smd site it has the height 1 an 2 an depth 1 an 2 so i figured hey it will work but it doesnt for me..it messes up an doesnt add height 2 in so i makes it just a square box i wana do 21" tall front 13.50" tall in back 17" deep an 35" wide.. with them specs i want sub up flush mounted an the port would have to go forward towards the top of the box! if that makes since.so THE would make the inside …

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    • 6 replies
    • 773 views
  4. Started by Soapbox,

    I don't fully understand Port Velocity. Using BBP I can figure the velocity but at what are the acceptable limits prior to encountering negative effects?

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    • 7 replies
    • 1.3k views
  5. Started by Ginobli07,

    I know this question has been posted before all over, but many of the discussions just turn into b***hfests, and no straight good answer is given. Would stuffing (polyfill etc...), or lining (vibration damper, mlv, etc...) a properly sized and well built box make any difference on the sound quality/characteristics of the subwoofer it contains? I'm looking for one good answer please, not a million random opinions. My head is just in a daze after looking at how many odd forum posts that don't answer the question I'm posing. Thanks to anyone who has good knowledge on this topic!

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    • 12 replies
    • 1.2k views
  6. Started by BanginGMC,

    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…

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    • 38 replies
    • 5.6k views
  7. I have an 08 cheny crew cab I would like to build an enclosure to go under the rear seat that will hold one BL 12"ran off of one T1000 fosgate amp this will be a daily application I will have to raise the seat to make it fit I will be raising the seat 4" the area I will have to work with would be best described as a wedge style box 55"w , 16"H , 8 "--9" D1, and 11" D2 Can anybody help me with die mentions for an enclosure for this application and ideas were the port should go and how large to make it I would lik to make this an up fire with the port coming out the front

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    • 24 replies
    • 1.4k views
  8. Started by BTL15,

    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.

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    • 6 replies
    • 805 views
  9. Started by flipzslick,

    Hey guy I need a good beating song with a long bass line ( about 3 min) box is tuned to 32hz and my car peaks around 40-44 on burps. I need a song that will last 3 mins. I have a comp in the morning and there is a kaos class ( average spl score over the 3 mins) I haven't had any time to try any on a tl any one have any sugestons?

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    • 4 replies
    • 887 views
  10. Started by aimone,

    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?

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    • 5 replies
    • 659 views
  11. 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!

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    • 8 replies
    • 4.1k views
  12. Started by ssh,

    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

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    • 16 replies
    • 2.1k views
  13. Started by Third Eye Vision,

    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…

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    • 22 replies
    • 1.6k views
  14. Started by badtoad454,

    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 ?

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    • 7 replies
    • 796 views
  15. Started by DiabolicCustoms,

    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 …

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    • 0 replies
    • 428 views
  16. Started by Dammed,

    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:

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    • 2 replies
    • 563 views
  17. Started by JammerJ,

    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.

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    • 15 replies
    • 1.6k views
  18. Started by notloudenuff,

    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…

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    • 15 replies
    • 1.5k views
  19. Started by Hanapi,

    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

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    • 7 replies
    • 1.2k views
  20. Started by matt cusack,

    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

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    • 14 replies
    • 1.8k views
  21. 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…

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    • 5 replies
    • 886 views
  22. Started by Notorious97200,

    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 !)

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    • 7 replies
    • 679 views
  23. Started by hhowell1990,

    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?

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    • 4 replies
    • 692 views
  24. Started by BanginGMC,

    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!

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    • 0 replies
    • 503 views
  25. Started by bmoney9,

    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.

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    • 3 replies
    • 703 views

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