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SPL & SQ / Fabrication

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

  1. Started by nate132113,

    Just wondering if 2 3in areo's would be enough port for two 8 in subs would be tuned to 31hz need input ASAP

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  2. Guest Guest_boom
    Started by Guest Guest_boom,

    well i got the expo to wang finally. its go the 4 PG 15's and about 3 grand in watts for the subs and the windshield wipers are now jumpin off the window and it feels liek your in a wind tunnel. I smile every time i get in it and blow my ear drums out with it. what? huh ? what??? dude i cant hear you speak up. Slayer sounds really good in it too. but i gotta love jammin some ying yang too. it will be at the march 27th import life tour at COBO hall in detroit. so if you can, be sure you guys get out there to check it out. Its ugly but it wangs. Im working on the fiberglass install still the guy that was going to do it went out of business. so theres a new cat gonna make…

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  3. Started by freat,

    This guy is nuts. Many of you have probably already seen this but it was my first time coming across it... Dodge Sprinter

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  4. Started by casedawg350,

    i need to build a box around 2 cubic feet tuned at 33 htz with a maximum height of 17 inches, does this look right? also, sub up/port back or sub/port both back?

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  5. Started by carguy6702,

    what did you guys you to build your ported box? i mean how did you figure out port length and tuning? what programs did you use or equations.

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  6. Started by KickinAudio,

    Who will be there? Who is competing? What Orgs? I'll be in Street B, and street classes...

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  7. Started by Dangercdv,

    I have made a ported box just over 1 cubic foot. This is for a 400rms, 10 inch sub. For a 2.5 inch wide pipe, I need 11 inches long for a 32 hz tune. IS IT OKAY TO USE 2 PORTS? and what type of pipe do I get? Can I just run to home depot, find a strong looking 2.5inch wide pipe, and go from there? and are 2 ports okay to use, even if there the same length?

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  8. Vehicle : 2002 Toyota Avalon XLS Location in the vehicle: Trunk with rear armrest access port Space available (Length x Width x Height): 22"x42"x16" Subwoofer make and model: SSA XCON 12 D1 Number of Subwoofers: 1 for now. Type of Port (Kerfed, Slot, Aero, etc.): Kerfed would be optimal, Slot if not kerf. What type of music do you like?: Electronic, Drum n Bass, Classic Rock, Alternative, Rap, Hip-Hop, R&B. Is your goal SPL or Everyday Music?: Everyday Music geared towards SQ Tuning Freq (Hz): 28-30 or so Volume : 2.5-3.0 Questions: 1. I plan on only giving about 600-1200w by a Crescendo BC2000D, should I have the volume of the box be closer to 3.0 to maximize effici…

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  9. Started by Julian,

    Alright, I am wanting to wait till i get a new vehicle to do a wall. (Still debating). I'd like to use two fifteens in my trunk, Thinking either AudioQue HDC3's, Fi BL's, or maybe some DC Level 4 XL's. A local shop said sealing a trunk on GM cars sounds like crap; Is this true? This would be the plan for my box Would this cause an audible noise or necessarily sound bad? I know it's install dependent but how do sealed trunks like THORSHAMMER's sound?

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    • 7 replies
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  10. Started by NighthawkFG,

    Is the correct way the measure a port that has a 45 in it or do you measure like a standard L-Port.

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  11. Started by nigel,

    okay, well I got some money for my birthday, and was thinking of picking up some mdf to build a ported enclosure for the SUV. Single 15" sub off of 600 watts. mfg reccomended optimal enclosure is 4 cubic ft. tuned to 34 Hz. My max dimensions available are 38.5" W x 24" D x 18" H Here's what I was thinking: 38.5" wide by 18" high by 18" deep (outside measures, using .75" mdf) Sub up, port back. Port 16.5" high by 4" wide by 28" long (acoustical, physical 23.25" since it will have a bend) gives a gross volume of 5.82 cubic ft, net of 4.24 cubic ft after subwoofer and port displacement, tuning of 33.8 Hz will be adding some bracing but not enough to bring tuning …

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    • 7 replies
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  12. Started by Breakjunki,

    I found a sweet deal I just picked up a killer old school soundstream Rubicon 1002. The blue one. It does 250x2@4 underrated, and 1000x1 at 4 ohm and 2. Will be PLENTY of power for the old front stage. And just a all around sweet amp And I've seen them sell for $250+. I got it for $85... nice...

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  13. So i built a 4.6cf box, tuned to 32 hz for a DCON 15. This is a big box. (at least for me) So I braced it very well. Is there anything else that should be done? Should anything be put inside the box? Like Dynomat, acustastuff? etc... Thanks, Duane

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  14. Started by hobbydepot101,

    I would like to go with two jl audio 13 tw5 or two re audio sl12 http://www.audiojunkies.com/blog/646/res-n...nclosed-woofers http://mobile.jlaudio.com/products_subs_pa...php?page_id=245

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  15. The vehicle is an '89 mustang (hatch). Im wanting to keep the enclosure at right around 10 cubes to keep my imp rise at about one ohm but want a different port placement. it is possible that this may just be a wall but im looking for the best gains, what should i do? the build is with four FI SSd 12's thanks guise.

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  16. Started by handman84,

    I have spent the last few weeks playing with the orientation of my sealed subwoofer box in my trunk and found the best orientation (to my ears anyway) I am now designing a ported box and was wondering if the optimal orientation will change sealed vs ported? Here is the current orientation:

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    • 6 replies
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  17. Started by oxsign,

    2 part question, lol. 1). I'll be getting an '05 Chevy crewcab next week sometime, and I was wondering if it's possible to get 2.5 cubes anywhere from behind/under the rear seat? 2). If not, I may consider a blow through. The problem is I dont want to cut a big hole. What effect on tuning would building a box like this? Thx for any/all help you guys can give. :clap:

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  18. Started by lithium,

    i need a free box design program to run on my mac thanks

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  19. Started by nick_19,

    Howdy SSA. Haven't been on here in forever. OK so I am looking to create an interchangeable port system for my box. Here is the layout of the box: (Feel free to steal the design) Playing around with my little box designing sheet, I thought about making a system where I can remove an appx 7 inch section of the port wall and insert some custom made plugs to lower the volume of the box. This would be just to switch things around. Now does anyone have an idea of how i can create a moveable port wall? I thought about a slide-in design (a hole cut in the top of the box that would let me slide the wall down in like a dam wall) or maybe a system of rails. I'm just looking for so…

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  20. i built a sealed box for this sub .6 cubic feet and it sounds good but it depends on the notes and it just drops off different notes and its loudness lacks majorly im very disappointed in this subwoofer... i have 800 rms going to this sub at 4 ohms and my amp can be wired to 1 ohm at 1600 watts rms and it still sounds like crap? help a brother out.... thanks im at lose and ready to sell the box is air tight its a good box. i m lost ?

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    • 10 replies
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  21. Started by KingManny,

    Birch is looking a lot better than MDF atleast in Miami humidity for a 2002 Chevy Avalanche midgate enclosure. But I need help on the best specs to get the most out of 2 Nightshade 15's sub box. I'm going to coat it with spray on Truck bed liner to protect it. Sundown recommends a 2^3 enclosure but I just wanted any tips and the best layout that's worked for you all.

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  22. Started by FiBl15,

    well its that time of year again, when i have some money comin in. Hopefully this will be finished up in the next few months. its goin in my 84 cutlass. 2 Mach 5 MJ-18, off of a AQ 1200. the box is 10.97 cubes @ 34 hz, and 175 sq. inches of port. the bracing in the pics isnt what its actually gonna be like, i got in a hurry and just threw it in, ill be glassin the inside and usin thread rod. the corners will also have 45's. oh and its out of 1'' mdf. Comments or suggestions appreciated. demensions are 42 wide, 29 tall and 24 deep. It seems that a box that big with that much port would have horrible port noise, but supprising in the car none of my boxes have have ve…

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  23. Started by paulmocan,

    Hi everyone, My name is Paul Mocan, and i am from Cluj-Napoca, Romania. Adrian_D is a good friend of mine, and one day we decided to transform my 20 year old Volvo 340, in a SPL car... here is what happend. We started with adding a second battery behind the passanger seet, and complettly removed the rear seats. We made a box design with 2 ports, one for SPL and one for music. My car was a wreck. I had oil and watter dripping out of it, but it was a crowd gatherer. I'll come back with some pictures...

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  24. Started by garyh,

    any one with a 2.2-3.0 cu./ft speaker enclosure for sale. it is needed to house a single 12" bl tuned to 32 hz. o fit in trunk of 2006 ford focus zx4. also if no on that then i need a box for two 12's for trunk of same car with same speakers 12" bl fi loaded.......G

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  25. Started by Aruman,

    yes guys, as the title says's how in your opinion would you brace this box? here's a link since i can't post pics here: http://forum.ecoustics.com/bbs/messages/4/487885.html

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