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SPL & SQ / Fabrication

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

  1. Started by cheese20323,

    I'm going to build a box just want to know were to buy mdf

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    • 11 replies
    • 873 views
  2. Started by Julian,

    I'm planning on building a wall in my Lumina, I'm in need of a design. My set up will consist of 1 DC power engineering 270 amp alternator,~3 deka intemidators, 2 Audioque HDC3 18's in a 12 Cuft wall with a removable port tuned to 38 for daily and higher for comp. Lastly to power the subs a Sundown Audio 3000d. here are some specs with pictures included. Pictures w/ measurements Height: 37 in Width: 29 in and at the curve 38 in from the hump to the roof is 38 in 33 in from rear deck to seats 46 in from bottom of the floor to the ceiling 55 inch from door to door More pictures (P.S. I know my carpet is dirty. M5 already made it apparent)

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    • 6 replies
    • 845 views
  3. Started by wof131s,

    Am trying to figure out the port area for round ports in my design. Am going to build an enclosure that is 4 cu.ft. after all displacement turned to 30Hz for a 15" Fi Q. I know that for a slot port, that its length X width to calculate port area (i.e 14 X 4 = 56 sq.in. of port). I also know that for a round port, that its Phi X radius sq. to calculate port area (i.e 3.142X4 for a 4" pipe = 12.568 sq.in of port). This is what am not understanding is, to get the needed port area for using 4" port in a 4 cu.ft. enclosure, you would need about 4 or 5 of them, or am i just full speed down the wrong side of the track? I was going to use a slot port but decided that it would ea…

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    • 10 replies
    • 11.2k views
  4. Started by DD9915D!!!,

    here we go Here you go. more to come Later

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    • 9 replies
    • 1.7k views
  5. Started by xmx2188,

    hey so is there any one here that can desgin for me a ported box. If you can design it, tell me and ill send message you the information for for demnsioins

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    • 8 replies
    • 1.2k views
  6. Started by dbrown23,

    I just had me a crazy Idea just wanted to get some feedback on what you guys think. I have a 95 eclipse that i have been contemplating on how to build this thing. Then it hit me, why not fiberglass a 10 in each door panel and flush mount the amp there as well. Tell me what you think.

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    • 33 replies
    • 4.2k views
    • 1 follower
  7. Started by freemanjc,

    Friends Does anybody know any alternative methods in contacting Custom Car Audio Home I am trying to order a box but can't seem to get a reply either by phone or E-mail. I also tried contacting fisher customs and have not gotten a reply from them either. R, Julius

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    • 8 replies
    • 1.1k views
  8. Started by Julian,

    I am designing my wall in my 95 Lumina, It is a four door Sedan. The wall will go up to the front seats. I was planning on making the port on the drivers side Vertically with two 18's like so On the other hand my father said it would be better to do the port on the top or the bottom with the woofers above the port. Is this true?

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    • 35 replies
    • 3.3k views
  9. Started by SpeakerBoy,

    I recently found my Visonik 12" woofer and i decided to build a box for it. I have ~$120 for supplies so nothing elaborate. My plan is a little under 4cuft (before displacement) tuned at ~26hz. I would like to use aero ports. The woofer is rated at 250rms, but handled 400rms from my RF200.2 like a champ. I have ~140wrms of clean power to play with, from my HT amp (Samsung HT in a box, very nice system for $220, on sale) I am switching it out for the current woofer, the 8" that is currently in the corner. My parents always turn the sub level way down when they watch movies (frustrating lol) So its mostly for my chopped and screwed music, that i can't fit on my iPod shuffle…

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    • 24 replies
    • 1.8k views
  10. I have a ski port with a latch/door that folds down into the trunk to allow air to flow through. If its ported through the hatch, and otherwise sealed off from the cabin, would that yield higher spl would it be a waste of time/money? Im not looking for pure spl, I just thought this might let me keep my sq but make it a little louder. My current setup is a regular 2.5 cube box with a bunch of room around the top/side to get around to the back of the box and through the ski port. Here's my idea(s)..... And sorry that it looks like a third grader made these sketches.. its all i could do with ms paint.... side view of trunk shape with ski port door open/folded down loo…

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    • 9 replies
    • 2.9k views
  11. Started by dbrown23,

    I am wanting to try building a enclosure with a flared port and was wondering exactly how to do it if anyone can help with this i would really appreciate it.

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    • 3 replies
    • 851 views
  12. Started by dbrown23,

    I was wondering if anyone new of any good enclosure design programs, the only one i know of is term pro. I was just wondering if there were any out there that were better. I am trying to do some experement ing with some bandpass enclosures.

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    • 6 replies
    • 1.3k views
  13. Started by dbrown23,

    I decided to do my blazer in the dark knight them the sub box is going to be the batman symbol the amp racks are going to be the joker playing cards. I need some help in deciding what to do the door panels and battery and distribution like to go with the theme using to svr batteries and and 2 sets of kenwood excelon 6.5 componets in each door.

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    • 2 replies
    • 605 views
  14. Started by Bobby32,

    Alright so my box is 5.38 cubes internally after the displacements besides the port. Im using a tube port thats 8'' diameter and I want to tune to 32Hz. My box only has about 20 inches of height to work with inside, so some of the port will be sticking out the top. I want at least 4 inches between the port and the bottom of the box. If anyone can help me calculate it out that'd be appreciated.

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    • 5 replies
    • 840 views
  15. Started by Julian,

    I need help building a wall in my 95 lumina, i don't want to pay 1 grand for a wall that i could build myself. Does anyone near Kansas city missouri know how to build walls? and willing to help a fellow SSA member?

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    • 9 replies
    • 704 views
  16. Started by dbrown23,

    Which enclosure do you prefer and give your reasons for sayin so. Just trying to see who likes what type of enclosure the best. Me i am kinda in between you can get a good all around sound with sealed, given enough power to run push it. I used to use a lot of sealed boxes because I really didnt have the room for ported boxes given the subs i was usin. Now I have switched to ported since subs now work in ported enclosures the size of what the old sealed subs used to work in. Also which one do you think handles ungodly amounts of power better.

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    • 7 replies
    • 839 views
  17. Started by Bobby32,

    I want to tune low for my nightshade 18. How big should the box be after displacements? Port area? Tuning? Thanks!

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    • 9 replies
    • 1.3k views
  18. Started by Ryan horn,

    Hey everyone first off I'm new to the site so I would like to say hi. Now I have a 2006 impala and I have a fi bl 12 and I had a fully costom box build that is right at 2 cubic feet and is tuned at 33hz potted through the trunk deck. Now the sound is horrible so atomatically I think it's the box but my buddy has the same size box and same size port that was taken out of a mozda rx8 and it's just sitting in the bak of a Mazda b2200 and we put the sub in that box and it freakin pounds. We took his treo out and put in my box and it has good sound. So my question is why in the world does the fi not sound good? I have had it in boxes that load up in the truck and sound amazing…

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    • 33 replies
    • 3.4k views
  19. should i face my subs and port into the car or both to the rear. these are not the only two options but im looking for the best way to get the best sq for a daily driver.

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    • 3 replies
    • 1.7k views
  20. Started by dbrown23,

    I build ported boxes on a pretty regular basis using the re enclosure calculator and they are always slot ports but i want to build a different box that uses a square port that isnt a slot port but I dont know the formulat to calulate the port area or convert the round port to a square port can anyone please give me some insite on how to do this please thanks alot .

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    • 2 replies
    • 844 views
  21. Started by buickid,

    Do you guys take this into account (from the JL box building page): I take this as meaning I subtract half of the port width from the length. For example, my calculations calls for a 16.5 x 6.15 x 26.25" long port in order to tune to 33Hz. Does the physical port in the box then become 26.25 - 3.07= 23.18 inches long?

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    • 1 reply
    • 2k views
  22. Started by stevemead08,

    Hey quick question: if im looking for say 33hz from an areo port in a box 3 cubes how do i calculate it if i need two ports? heres the situation, i have box 3 cubes, want to run 4 inch ports. if i make one port its 7.4 inches long but i need more area than that.

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    • 2 replies
    • 625 views
  23. Started by lilkman2202,

    I am looking to build another box but want something unique yet efficent. I'll pay for the design. Some specs on the trunk: Cannot be over 14" tall x 20"wide x doesnt matter too much over 40" deep. The box will be for a 12" btl loaded off 2 aq2200s. I would prefer tuning no higher than 32hz. Lets see what someone can do.

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    • 2 replies
    • 608 views
  24. Started by Rozon420,

    im converting 4 3" round ports to 1 square port. i made a 4x7 square this just seems smaller then 4 3" round port... please help.

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    • 2 replies
    • 675 views
  25. Started by hpdrlr,

    Hey guys I have all of my equipment just wantin to see if anyone here has experience with ext cab trucks. I have 2 Kicker CVX 15's goin in a Dodge Ram ext cab and I'm going to port them just can't decide where I need to face the subs and port. Can anyone help?

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    • 3 replies
    • 713 views

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