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SPL & SQ / Fabrication

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

  1. Started by spbfitz,

    i have 2 level 4 xl's in my trunk in a 9 cube box and its tuned to around 32 or 33 hurtz and i was wondering if anyone had song songs that would go with that tune? i know money man hits hard run quickly is insanely low just love that feeling

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    • 8 replies
    • 1.4k views
  2. Started by antoinez28,

    I'm thinking about going to a meca event and try and place....but wat class will I be in 2-18's, 4000watts, two 300 amp fuses( can go lower if need to) and I have no idea if I have a street Box or not...trying to start going to comps so I can rep these ETHOS

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    • 6 replies
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  3. Started by Lord Baccus,

    can you guess what im going to put in the old F-150 @ least till my new subs come in ...

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    • 10 replies
    • 1.4k views
  4. Started by ramos,

    Okily dokily, in the middle of building my kicks. Was thinking of ways to deaden them. Got to thinking about the idea behind using mat's and such. Correct me if I'm wrong here, but isn't the idea behind them to add enough mass so that the offending resonations are either stopped. or moved out of the audible range. With this in mind, I got to thinking of best ways to add mass and came up with an idea. I have a rather large stash of lead shot ( used to reload shells for my dad ) . Any thoughts on coating the inside of the kicks with an epoxy lead shot mix ? Seems like it would work. Any input would greatly be appreciated.

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    • 13 replies
    • 1.4k views
  5. Started by flakko,

    i finished putting this togethre right now... LMK what you think. I'm uneasy about the tuning freq because i was unfamiliar with the calc. i used. since the box is wider, i can now have a good 26" of port area. anything wrong with what you see? the sub itself is .3 cubic ft but i will add more baffle to compensate

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    • 10 replies
    • 1.4k views
  6. Started by turtles1118,

    looking around for some round tubing to fit an 18 inch sub, i had seen someone who has done this befor on the Mach 5 Audio test bed site but I cant find that site any more. If any one has done any thing like this befor tips and how to measure air space would be a big help. Thanks.

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    • 5 replies
    • 1.4k views
  7. Started by Ryan916,

    So my build calls for my 4" aeros to be about 38" long so I have to do some piping in my box with 90 and 45 degree turns. When measuring I'm assuming I stay in the middle the whole time and measure flare tip to tip? The turns are what throw me off when measuring. Thanks guys

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    • 5 replies
    • 1.4k views
  8. Started by Garrett Tait,

    i had a rockford fosgate t1d415 before and ive been messing around with custom boxes for a little while. i didnt know too much about winisd back then. luckily my first box i built for it played very nice and didnt have any port noise. i tuned it around 34hz if i remember correctly. i loved how low it could get down. i played into the lower/mid 20's (i know i was playing a bit lower than the tuning freq) and loved it. this time around im going to design a box for my fi sp4 15. it should be here any day (i hope) and i'd like to be tuned low. heres my current design for it. can you guys let me know if my design is ok. i know the port is a little skinny but it looks like the …

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    • 15 replies
    • 1.4k views
  9. Started by trex-btnhfan,

    On bandpass enclosures, specifically 4th order for the moment, but I will be messing with 6th order later. I am always re-reading the diysubwoofers page. If anyone can reccomend books, sites, etc.... it would be great. Also an general rules of thumb too.

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    • 10 replies
    • 1.4k views
  10. Started by tosh,

    s10 blazer. i have 6.5 door space tweeter space in dash.if i added another set of comps in the kick panel would i wreck my sq. just wondering being that one tweet in dash one down in kick. how about comps in kick panel and use the door for just a 6.5 mid

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    • 13 replies
    • 1.4k views
  11. Started by suprefly,

    I looked at a couple of websites but am still confused as to how to tune the port to the frequency you want. And how does the length, width, height of the port affect the tuning?

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    • 10 replies
    • 1.4k views
  12. Started by doeboi79,

    i currently have a fi btl 12". tunned at 34 hertz, hitting 139.7db. i was told that tunning higher is better for hitting high spl. there is a competition comeing up on the 10th. and the kids at the local car audio dealer ship told me that there were people with 1 12" hitting 142's. does anybody no how high i should tune my box so i can compette.

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    • 9 replies
    • 1.4k views
  13. Started by libertyreddevils,

    Wanted to get a few opinions on what you think is better for a spl box, slot port or areo ports?

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    • 9 replies
    • 1.4k views
  14. Started by Dangrebel,

    I had so e spare time on my hands so I figured I would relocate my switches and bass knob. Let me know what you guys think!!!! I'll get some pics of it installed tommorow!!!

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    • 14 replies
    • 1.4k views
  15. Started by black_cirrus,

    I have really thinking about trying to run surround sound into my car but don't want to spend very much I want to keep my active 3way system I should be wiring this week, cross-overed in my deck I like my alpine 7998. What options do I have no cheap junk like pyle please

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    • 12 replies
    • 1.4k views
  16. Started by Elrey7698,

    Im tired of my setup so i sold my 4 15's but now im stuck with the box..so im really looking for some advice on how much should i sell my box for.. Specs: 4 15's, 15ft^3 tuned to 35hz via a 45"x4.5" port. The overall dimensions are 48" wide x 25" tall x 34" deep. The entire thing is double layered, except for the bottom..its bare mdf on the outside but the whole inside is coated in fiberglass resin.. http://i1223.photobucket.com/albums/dd509/Elrey7698/de7c216c.jpg http://i1223.photobucket.com/albums/dd509/Elrey7698/fe895540.jpg http://i1223.photobucket.com/albums/dd509/Elrey7698/abd78364.jpg

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    • 11 replies
    • 1.4k views
  17. Started by styllikeitloud,

    sup planning on entering in my first spl comp. in Roanoke Va. Mar.22. Was reading the rules and got somewhat stuck on the part about the fuse requirements. I'm using a 200amp circuit breaker, do i need to install a fuse in its place to enter. Will be running a saz-1500d on 2 12" lvl4 d1, also would be considered AS1 or AS2. Hope to meet some of you there. Styllikeitloud

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    • 8 replies
    • 1.4k views
  18. Started by Juice0723,

    ok this might be my final design. I used re calc to get the port length and used the other calc to give me my final specs including displacement.

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    • 6 replies
    • 1.4k views
  19. Started by jacob9292,

    i tried using torres calculator from the smd forum, ya not very good at it. i have 2 sa 12s. and i would greatly appreciate it if someone helped me out. I have a 98 chevy blazer so space is not an issue.

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    • 6 replies
    • 1.4k views
  20. Started by DeeCee,

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    • 12 replies
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  21. Started by mikee72,

    has anyone here tried to build an 8th order bandpass. i ask because i have had decent succeswith the 4th and 6th orders but now im thinking of trying a 8th order just for spl and was wondering if anyone had any experience building one

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    • 4 replies
    • 1.4k views
  22. Started by Cruz87,

    I need a wall built , anyone from Dallas/FORT WORTH area can build ,know wut they doing ? Let me know In a yukon xl 2006 . 4 -18's

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    • 4 replies
    • 1.4k views
  23. Started by stan,

    What resonant frequency of this car(honda civic 4d 2007)? Your recommendations for construction of the ideal box(spl), for Solox 12!

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    • 3 replies
    • 1.4k views
  24. Started by valin,

    This is my first post on here, and need some advice from the BTL gurus I just picked up two BTL 18's, dual 2's, fully loaded, and will be running them off of two modded Memphis Mojo MC-2000d amplifiers (1 on each driver at 1 ohm), approx. 3000 watts each. In my vehicle, which is a 2007 Toyota FJ Cruiser, I don't have a whole lot of useable space to work with and still maintain practicality, so the enclosure is going to be a bit tight for specs. I will run the subs inverted to try to save as much airspace as I can, but I only have a total of 11.2 cubes to work with, before port displacement. This is going to be a daily setup, and I am more than likely going to build it…

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    • 6 replies
    • 1.4k views
  25. Started by codester,

    Been awhile since Ive been on here but I Just purchased back my 2x 15" SSA Icon subs I first purchased around 11 years ago. I have/ had them in a 7.2 cubic foot box net tuned to 32 and it sounded great on the bass music and rap/ hip hop I used to listen to but not amazingly accurate/ punchy on rock, etc. Im looking to only use one of them in my 2010 Ram 1500. I currently have a 10" JL W7 in a sealed box in the truck and it sounds great and I love it but doesn't quite have the output Id like and planning to put 1 of the Icons in the truck. Im considering either Ported or sealed. I now listen to mainly bands like chainsmokers, club music, alt rock, heavy…

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    • 2 replies
    • 1.4k views

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