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SPL & SQ / Fabrication

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

  1. Started by edouble101,

    My current front stage has visible speakers in the a-pillars and kick panels. Imaging is great, sound stage is deep/wide and often outside the vehicle. I have wondered what it would sound like if the speakers were hidden. Would the sound stage be wider, deeper and even more transparent because I would not be able to visibly localize the speakers? I stumbled across The McGurk Effect. Just to give you an idea of how visible my front stage is. Hmmm..... time to start re-making a-pillars for a hidden install? And carpet over kicks?

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    • 21 replies
    • 2.4k views
  2. Started by Brett_the_Vandal,

    Pretty simple question. Anyone ever personally built and owned two 15s in a seales enclosure? Im gonna be doin It soon probably and was wondering what your results were. My box design Is around 5 cubes after displacements. They'll be two old style havoc 15s. And ill be running them on mg aq1200 until budget gets me a bigger amp or a diff box or set up. Thanks

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    • 15 replies
    • 2.4k views
  3. Started by mld4.2,

    Ive read on some forums that peel and seal will work for sound deadening just like dynomat. I was walking through home depot yesterday and saw the roofing tar, would this work like the roadkill liquid stuff? Its alot cheaper.

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    • 20 replies
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  4. Started by gprestonmoto,

    Hey guys, a friend of mine is looking to install his Tymphany Lat 700 in his Chevy Astro. Currently I'm looking at 40x21.5x10 with 2 3" ports. Length of 15" for the ports tuned to 24Hz. Torres says this is correct. It's mainly a show piece, and he wants to get it moving. Can anyone help me out with a box design or recommendations? It's kind of an odd driver(s) http://www.tymphany.com/files/resources/dlat/LAT700-001.pdf Sub will be used on music not Home Theater

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    • 8 replies
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  5. Started by HCCAfan,

    First i would like to say thanks to everyone that is competing this year and promoting their organization of choice, and also would like to thank people who are going out of their way to promote the industry as well. I also wanna thank anyone coming back into the lanes to give em hell, to do what they know best, and that is GETTING LOUD! And with this, I would like to thank ALMA for joining our small group here. Hope you enjoy your stay and hope you can give out some good info to the newer crowd on what you have seen and where you might forecast where we are all heading. Anyone wanting to learn more about Team Gates or ALMA can either post here or visit her website a…

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    • 14 replies
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  6. Started by aimone,

    ok so im hopefully gonna get pix tomorrow and start my new build log. ill also get measurements of my hatch area tomorrow. i've got my 4ft3 box tuned at 33hz in my 93 lx mustang hatch right now and its just to big. it currently sets taking up half my backseat(folded down) and a 1/3 of the hatch area. reason for this is it wont slide back anymore in the hatch area cause the box hits rear window. saz-1500 is temporarely mounted to the backseat right behind front seats. so i need help on how to face my sub and port to get the max. loudness and airflow from my rf power hx2 15 while still being able to use my backseat for its intended purpose. also im set on 33hz for port tuni…

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    • 4 replies
    • 2.4k views
  7. Started by hardrock2401,

    Wanting to do my next box with birch, what exactly am I going to need to look for when buying it. Thanks

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    • 19 replies
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  8. Started by etc.,

    Are 45*s needed with in boxes that use PVC tubing as ports?

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    • 14 replies
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  9. Started by Solid_State13,

    would applying resin to the entire outside of the box stop the wood from absorbing paint? and would it be a good way to do it? Because i feel like the wood would absorb primer almost as much as it did the paint. I'm just wondering because the last box i built took several cans of paint, (and it was only for 1 10") and even then, the paint only came out ok

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    • 20 replies
    • 2.3k views
  10. Started by loondizie52,

    when you build a box with a square or round port, isnt it nearly impossible to stay within the 12-16 sq in of port area per cube rule? if so what is the rule for those? and when making a external port it is still the same length as if it would be internal correct, only it is on the outside...

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    • 9 replies
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  11. Yeah i know i haven't posted in a long ass time.. However.. So i finally got the Navi goin a while ago and sold the town car. I kept my same box i had and just threw it in after i reconed my MT's. So needless to say 10x louder in an suv than in a car. But after a week or so off playing music i start to notice rattles and squeaks. So a few days later the bass just isn't hitting. So I go back to the box and see this... Thinkin to myself dam, i might need to start fiber-glassing the inside of my boxes lol. Funny thing is i can listen to my music all day up loud but passengers seem to have sensitive ears..on the broken box at that. lol 2 18" mt's 5k watts btw 150's im hopin …

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    • 19 replies
    • 2.3k views
  12. Started by jimbo,

    Would it be possible to make a transmission line box for 2 18 Q's in an area that's 16" tall x 39" wide x 70" long with an additional area of 22" tall x 52" wide x 10" deep OD? Like this: Would having the subs mounted off center make it not work?

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    • 22 replies
    • 2.3k views
  13. Started by BeAlLsTaR13,

    well i ran into an issue today, which isnt TOO bad just its one of those things that dont go as planned that you gotta get around well i was going to start a portion of my new build today, or at least test fit (thank god i test fit on this and didnt run into it last minute) but i had originally planned to fit my ID CTX65cs comps in my doors, the mids are 6.5" which generally i can fit that circumfrance, however.. not that specific depth i made these rings to go on the door panel, they are 3/4" MDF, with a 1/4" flush cut out for them.. flush is king and they fit in the rings like a charm (first time i made my own rings - so i was happy) i primered them and painted em so th…

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    • 15 replies
    • 2.3k views
  14. Started by cx-7heaven,

    I'm just about ready to buy a H-701. I have a pair of sundown sax-100.2's running dual mono to my Diamond d-971 components(~400 rms per side). I wonder if I should stay with the passive xover or go active... I have the capability to easily switch between the 2 when I get the processor. Also, I just got off the phone with Diamond, found out that the tweet is crossed at 850 hz, but he said that the woofer has no upper cutoff freq. If I do go active, Where should I set the freqs, I want to try and keep the tweet as low as possible to bring my stage up. Any help would be greatly appreciated.

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    • 18 replies
    • 2.3k views
  15. For 2 Fi BL 18s in a box that is 2cuft over the manufacturers recommended enclosure size the final net volume after displacement is 18.29. I have the tuning freq set at 33hz. What would you guys tune this box to? Or should i keep it the same? Thanks!

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    • 8 replies
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  16. Started by Rozon420,

    First off managed to pick up a 93 civic hatchback for 700 bucks and I would like to know what type of set up would be best, like port direction, sub direction, box style all opinions welcome as i'm pretty sure someone here would have done something like this already.

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    • 23 replies
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  17. Started by antonmiller,

    so i was told my wall was too big, lol which it is 16 cubes for 4 12"s, but beyond that, we still get a solid 152 on 1900 watts clamped, looking to gain fairly large numbers (1.5 db) without increasing power and withing 2 weeks lol. but i was told about a rear loading wall, the guy told me that he stumbled across putting a "wall" inside the wall that has around 2-3" of gap between the edges and was at a slight angle, claims to have gained him 8 db (i doubt it, but he has all the equipment to know what he did and how much it gained). what do you guys think of this, all i can think of is that is sounds like a bandpass with some sort of a horn effect to it... im not sure…

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    • 12 replies
    • 2.3k views
  18. Started by dbALPINE,

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    • 12 replies
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  19. Started by shizzzon,

    how exactly do u go about finding peak note to use in port wars? i know what to modify AFTER the port is made but how do u know which note to use? i was thinkin about throwin the meter in the box and sealing it up.. but... if i do this, will the car's peak note effect the peak note for port wars? or IS the proper tuning for port wars equal to SPL tuning?

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    • 17 replies
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  20. Started by Slumpin,

    i just started building my first mdf box. im using 2 1/2 inch drywall screws and the proper drill bit. everytime i try to put them in, i split the wood. are these screws to long? not drilling fast enough or what? done it 4 times so far, and i dont want to keep wasting wood.

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    • 19 replies
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  21. Started by steveo50,

    i know birch is lighter, less dust. but is there any thing that makes it better then mdf? the guy building my box is pushing me to do birch only charging me 50 bucks extra for it so its not breaking the bank or anything. does it sound better? im sure it will last longer. its for a daily system not after numbers i only meter when i get new stuff to see how much of a difference it made. edit: for bad spelling

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    • 18 replies
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  22. I have a 2004 Cadillac SLS and am looking to fab a 4th order enclosure for 2 SA-8 V.2's on a SAZ 1500 V.3. The reason for the smaller sub is to help save room in the trunk and to still have high output. The reason for the 4th order is the infamous Cadillac trunk bass trap, so I would like to port the enclosure through the stock sub location in my rear deck. I am not too familiar with hertz levels or anything, but I can tell you that I listen to every thing from Hip Hop, R&B, Jazz, and Alternative. New to the forum here and just looking for some experienced suggestions. If you would like more detail please let me know. Would like a little seasoned input before I spend …

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    • 5 replies
    • 2.3k views
  23. Hi I need some help designing a box for two Digital Designs 2512c D2 Each sub will be wired to its own hifonics brz1200d @ 1ohm My max dimensions are: 38W X 14H X 22D I am looking for subs+ port (centered) firing foward I listen to rap Thanks! p.s- i plan on printing what i get here and giving that to a shop (cut list, google sketch ect.) i dont have the right tools to do it myself

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    • 3 replies
    • 2.3k views
  24. Started by djjdnap,

    O just for giggles i built a lil oh 3cu tuned to 34hz box. . threw it in teh car hooked it up and it gets loud about as loud as my sealed 2 sub box.. But the thing i hate hate hate is that, it only does this at the higher hz's. Like low low bass plays but it doesn't rattle anything ect ect... I think my 18's had me spoiled though and i could just be being biased, lol So to compensate for the lows what would be a better tuning for my needs..28? or should i just go back to 18's

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    • 19 replies
    • 2.3k views
  25. Started by PhilHef,

    Hey guys im switching from CVXs to BLs im wondering if my old box would be ok with the new subs till I get a new one built. Car Tunes built the box and its suppose to be "spec" for the size of my truck and the space im utilizing. They said its a 1 chamber for 2 subs. I went outside and measured it...dual 15s btw 20.5in long 42in wide 18.5in high The port measured 2.5 in wide 16.5 long I just wanna know if this box is close to whats recommended. Im sure they need more port volume but I don't build boxes so someone enlighten me please lol. Any input is greatly appreciated guys! Thanks

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    • 5 replies
    • 2.3k views

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