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SPL & SQ / Fabrication

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

  1. Alright, so on my quest to get louder out of my trunk, I'm trying to really understand enclosure designs, and how different enclosure sizes effect response, output and other factors. Now I know the general basics, larger enclosures will be more efficient, smaller enclosures less efficient. But I guess I'm looking for some more in-depth information.

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  2. 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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  3. Started by swift,

    How does this look for a box plan. I am looking at going ahead and buying a 21in DP since I have plenty of airspace to work with. I also wanted as much cone area as possible that would be ok powered by my Saz-1500v.2. This would replace the rear seats in my 07 F250 and would be at window line. Goal is to hammer the lows, get loud as piss and sound good doing it. Will this work or should I change anything. Sub / Port will be facing forward. Around 10cu tuned at 30hz I got no responses in the IA section so it may be better suited here.

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  4. Started by twink,

    Anyone wants to donate some blueprint of boxes that could fit here sub is 9515 w/ strapped saz1500 amp Length - 31.5 inches Height - 18 inches Depth - 22 inches These measurements are the space left to be exact, no box yet. Assuming 1inch MDF will be used and I'm eyeing for 4.5cu.ft. or 5cubes plus port tuned to 40-42hz. Sub is facing up and port is facing the rear hatch door. With the given depth, there's a 4inch gap remaining before the box/port would hit the rear hatch. Id appreciate your suggestions. Thanks

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  5. Started by Marlin15s,

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

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  6. Started by rickandleli,

    I am building a box for 2 XCON 18s and am trying to get as close to recommended specs as possible. box is going in a 99 Durango. i really want my subs facing forward so people can see what they are feeling! But not sure about where to place the port. SSA recommends 100 inches port area for each sub, so only real options on location is on the front, bottom; or facing the back hatch. i noticed a lot of street rides have the port facing the hatch for whatever reason. any input/suggestions will be greatly appreciated

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  7. Started by the bear,

    hey guys my friend has a cda-9855 that has a big green wire what does that do becouse it was cut when he got it will it work with out that wire thanks

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  8. Started by vial,

    Height = 13Inches Width = 48 Inches split in half for two seperate compartments one for each sub. Depth1 = 6.5 Inches top Depth2 = 12 Inches bottem Now I donw know much about porting or tuneing. Im running two CVX's dual 2ohm VC wired @ 2ohm load off a 1500.1 zx This long skinny box fits behind my two seats in my pickup truck with one sub behind each seat. When my cousin made the box for me he put a board in the center to seperate the two subs so they both have different compartments. I wanted to maybe port the box to get a deeper boom. But i have no clue how big to cut a port hole... VentedCompact (MinimumEnclosureVolume from the manual CVX12 1.7…

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  9. Started by JeffU,

    alright ive came to the conclusion that with school and measly allowance i dont have the time or money to get into the really competitive comps, but i remeber hearing that some compitions have std size truck divisions if thats true how is that division broken up? if there is such a division im going to try and be running 2 SS rl-i8 around 800 watts rms (if youve seen my newb sign in you know why i have to try). do comps break down divisions by power number of speakers size of speakers....thanks sorry according to my eng4 teacher i have horrible paragraph structure and sentence flowing skills

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  10. Started by cLutcH,

    I have always wondered this and I'm hoping to get it answered. Is there a better way to aim subs? Most people I've seen have had their subs in the front of the trunk aiming to the back of the trunk. But people have also had the subs aim towards the back seats. And I've seen subs aimed to the sky. Is there any advantages to aiming subs to different places? What about the port. Most ports I have seen are right next to the woofer. What if the port was on the side of the box, what about the back? Top? Is this just the way people do it, or is there an advantage of having the port next to the woofer.... Any input is greatly appreciated

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  11. Started by mysticstylezaudio,

    Ok I am doing a box for 4 fi ssd 12's. It will be 8 cubes after displacement. I need help with the port tho. I am wanting to tune to like 35htz. I kinda want to try flared aeros but don't know what size or how many. Can someone help me out. Also need help with the length

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  12. Started by gadgeteer123,

    I Just got a pair of Eclipse 8062 6.5" mid-bass's with there crossovers, and no tweeters for $60. I thought it was a good deal so i got them, I needed a upgrade from my polk db 4x6's. I tried the eclipse out in the house in a quickly made box and they sounded great, but I cannot get them to fit in the car where they will be completely sealed like they need to be. My speaker holes are 4x6" on the top of my dash facing the windshield in each corner (I will post pics). I need help figuring out a good solution to where they will sound good and look kinda decent in the car. I can't put them in the doors and i am not allowed to do any permanent modifications to this car. So wha…

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  13. Started by dopey,

    In the process of designing a box for the 15 Loaded BTL. Can I design an "L" slot port box to have a tuning freq of approx 40hz for comps...and then just put 1.5" thich MDF along one side of the port? Since calc's tell me that will bring me down to 32hz. So the port will be approx 6.5 inches wide for a 40hz tune and 5 inches wide for a 32hz. I'm just wondering because only the last 14inches or so will be 5 inches...the other 14ish inches (inside the box) will still be 6.5 inches. Will this screw with tuning...and will this raise or lower my ACTUAL tuning freq?

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  14. Started by twisted_bass,

    I have a phoenix gold ti 12d and i'm wanting to build a 2.75 cu/ft SQ box tuned to 25hz. which are the specs. that site recommends for it. i have a mtx te 1501d that will be powering the sub in my 08 4dr toyota tacoma. i'm not the greatest with math and formulas so any help to make this buildup as painless as possible would be great. thank you

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  15. Started by mason_herold,

    im going to have two FI BL 15s and i want a good enclosure. my max dimensions are 50 inches in width, 28 inches in height, and 25 inches in depth, and i kinda wanted a design plan such as the port dimensions and should i go double or single baffle?

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  16. skip to about 9:30 to see them take apart the speaker box, or watch the entire video if you want a good laugh. I've never seen anything like this in my life. And I thought the chevelle that Meade fixed was bad LOL it does not compare to this http://www.youtube.com/watch?v=AKH23bamIKU

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  17. 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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  18. Started by just1moreamp,

    this is what i got the box is 41''w--18''tall---26''deep--this is all outside --the port is 3.5''tall---27''wide---18''deep----i think i have like--7.75cf net--port tuned to--33hz--can someone tell me if this is right----the subs are the--FI BL 15''---i will have a---ia 20.1--on ea sub let me no what you think and if i need to do something about the box

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  19. Started by Dangercdv,

    Okay, so I have very little room to work with, and needed help on how to port a wedge box. I have 2 designs I can use for the port, both are using the same box. Width: 15 inches. Height 1 (front): 12.5 Inches Height 2 (back) 7 inches Depth: 18 inches total volume (using 3/4 inch think wood) = 1.06348 cubic feet. So one idea is to place the port under the sub which is the eaisiest. 13.5 inches long, half an inch tall, 14.5 inches of port space (32hz tuned) ^ I need to know if theres anything wrong with this idea? The 2nd idea, which is more complicated, is placing the port on the side of the box. I have no idea how to calculate such a slant. Would the 1st option be …

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  20. Started by MKader17,

    My buddy had talked to me about building a box for his F-150 for 2 12" Xplods. Looking around I think it may be possibly to get 5 Cuft. (or very close) for the 2 12s. behind the seat I was curious what is the best way to face the ports and sub. I think the only way to face the the ports is up, but I do have the option of either down facing them down or foward. What is generally best practices for SPL?

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  21. Started by Notorious97200,

    I have read a lot on the subject, but I can't get a final answer. Like a lot of people in my country (we have small cars), I have limited space in my trunk, but still want to use a ported box. I've read that round ports can make me save space. But I don't understand how. The same rules should apply : 12-16 sq inch of port area per ch ft. What can I expect for a 3.5 cu ft box ? I would like to make a smaller box so that my amps can breathe Thanks

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  22. Started by SmokeyDog,

    I have a question about ports. I am having finely decided to use round ports. But I have a problem; I have 8.89ft3 I want to tune around 38 Hz. The problem I run into is I need like 15’’ of port. The box is only 14’’ deep, going with 2 8’’ ports. So, can I bend the port with a 45? So it will make it in to the car with out a problem. If yes, do I have to add any thing to the length, or do I just cut the tube where it needs to be and add the 45 in between the cut peaces. Trunk setup subs up, port up going thought the rear deck.

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  23. Started by blackga,

    im trying to fit two lethal injection 15's in a 06 monte carlo. so according to looking to specs they say that i need about 3 cubes min. i was wondering i could fit a box that big in a 37 w , 36 l , 16 1/4 h. i am also open to using aero ports if thats what i have to do to fit the enclosure. thanks for everyones help in advanced

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  24. Started by mcbuggin,

    ok well I have been toying with the idea of 2 15's in a wall in the bug (13cf gross) but will that much air movein in their cause cancelation or something that would hurt my score more than help it. I also only have usaci comps up where I'm at so I am allowed to open my doors and such just woundering. Thank mc

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  25. I have a question for anyone on here that has experience with 6th order enclosures or blow-through boxes. I have finally gathered everything I needed for my build in my silverado (standard box). The part that has been bothering me is that the build that I originally based my idea on was Jack Chisam's Sleeper. The basic design was a series ported 6th order with the front chamber untuned and the back tuned around 30hz. it is a 3:1 ratio 6th order. The woofers I chose were the Zcons (6) and I am running them from a American Bass 1100.1 (maybe 2 in the future). The amp and batteries are in the very back of the bed on the back side of the box. So, with all this being s…

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