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SPL & SQ / Fabrication

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

  1. Started by djjdnap,

    So basicly, box in trunk, 2 18's and 1 amp. for whatever db and iasca i guess, but for iasca i would have 2 amps

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  2. Started by lithium,

    so i still havent gotten around to doing a new box for my bro's L7. but im thinking about trying something alittle different. he basicly only wants spl so im thinking about trying a wall... i have to build the box in the trunk anyways so might aswell try something new. its a mercury sable by the way. im thinking 6 cubes net design from the manual or do a tuning around 34hz...? we are prepared to deaden the rear deck, etc. will there be more output from a wall in this car or would it be a waist of time? if we did the 6 without the wall there wont be much of a trunk left anyways... and im sure we can seal the trunk off from the rest of the car effectively.

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    • 7 replies
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  3. Started by Dutchie.,

    Ok, so i have the planned dimensions and i need help calculating the port and seeing if this box is ok? Two Alpine type r 12's will go into it facing towards the roof of the vehicle. Length (Depth) = 26" Width = 37" Height = 13" So what should the port calculate to? According to the re box calc. they say the port length is 34.75". Is this correct? I'm usin .75" MDF of course.

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    • 8 replies
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  4. Started by JBano13,

    If I hsve aeroports half internal half external does the volume of the external portion of the port count towards the internal volume of my box? Also would the surface area of the portion of the port within the box divided by 1728 by the ports displacement? Thanks in advance!

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  5. For all you guys here in california, or wherever your are, come check out our comp. As of right now its a 2x weekend. With our comp on Saturday and another on Sunday in Woodland. Here is the info. Even if you do not want to compete come out anyways. Come chill... or compete its going to be alot of fun. Giveaways too!

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  6. Started by mrbojang,

    So i've been doing some reading and I'd like to seal the rear vents in my '06 tahoe. I've never worked with sound dampener before but I think that's the best route to go..Any suggestions as to what I need to buy or the best way to do this? Pic of someone elses truck an the vents in question:

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  7. Started by samuel6731,

    I have a FI SSD 15. (bp power, flat coil) I currently have it in a 18x18x38 box tuned to 34-36hz somewhere in there. aprox 4 cubes. Im thinking of building a new box, what should i tune it to, and how many cubes? i find my box has a slight bit of port noise because there are no 45s and it doesnt go as quite low as i want it to. Iv heard other ssd 15's hit harder than mine, so im trying to squeeze every thing i can out of the sub. also with the box the way it is now, what should my Amp be set at? Lowpass and subsonic? If it matters: its going in a crew cab GMC, powered by a AQ1200. thanks, in advance all help is appreciated

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    • 10 replies
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  8. Started by 2Loud,

    So i made a 4th order bandPass for 2 obsidian 12s out of birch. I started sanding the enclosure and filled it all the screw holes sanded all those spots with 60/120/220 grit sand paper everythings smooth(so i thought) i started painting the enclosure with kryole dual primer and paint(spray can) i thought it would be good to use that lol well im pretty stupid to think that was gonna work great. The corners are very dull along wIth the edges that are sanded and the top and sides are super shiny and it looks like shit. Whats a good paint to use to paint birch with and have it turn out super glossy. My goal is to have it very glossy and not be able to see with the edges meet …

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    • 5 replies
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  9. Started by Hell-Razor,

    Alright well I finally have a new box design for my level 5 15". I just need some help with those of you who have built boxes in very tight situations. I have about an inch on the left and right side to spare and a few inches on top. I cannot build it outside and then toss the box in because my trunk space is too small. Rotating it will be difficult as well.. I have read on here people doing very big boxes in small areas inside their car. Pictures will be posted soon in my build log as well!

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    • 6 replies
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  10. Started by vladd,

    ok so the car is a 98 Dodge Stratus. I have to have access to my spare tire and would prefer a removeable enclosure but thats probably not happening. What i have now are two boxes 3/4" MDF 3.13cubes each tuned to 36hz. i want something that'll look more custom and less amateur. I've considered finishing my boxes and what not but its really not worth it to me, i'd rather just toss the boxes (not actually throw away) and start with fiberglass. I'm pretty good with fiberglass but never tried it in cars/audio, i think i can manage though. what i really need from you all is ideas on how to make this look good, i'm wanting front firing subs like they do now, and my amps a…

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  11. Started by Lucky 76,

    What I planned on doing is glueing a layer of plexiglass over the top of painted mdf. I want it to dry clear so there will be no glue marks. Is there anything out there that can do this? I have looked and all I could find was plexi to plexi glue. Any finds would be greatly appreciated.

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    • 10 replies
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  12. Started by jonbearsmt,

    hello im intrested in finding out where i can pick up ther softwear and hardwear to mesure sound on my laptop

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  13. Started by Slumpin,

    i'm thinking about making a box for my trans am to these specs, but i dont know if its going to be big enough for my rl-p's. i know it should be simple, but i've tried for hours and can't figure this out for myself. could someone please tell me how many cubic feet per side i'm going to get out of this box if i build it? i would REALLY appreciate it. http://thirdgen.org/techbb2/showthread.php...threadid=306257

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  14. Started by rowdyful7,

    i have my cart full and about ready to order in the next few days so what I need to know since ssa store does not carry fuses what website do all of you order your fiuses from

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    • 7 replies
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  15. Started by hayslett,

    I was wondering, I am trying to figure out how to not make a box but find out measurments ... well what should i look for when I am lookin at the sub specs and what just what do i look for to make sure everything is perfect

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  16. Started by pat_smith1969,

    What I HOPE to attain is a great sounding sub stage (I have two SA-8s) that gets REAL low and is real tight. What makes my goal a bit different than most requests is that I don't care about volume (SPL), I will never put a meter on it to check my SPL... I want low extension, and tight bass with very little hump in the response curve (I realize it is nearly impossible to get a flat sound from a ported box). Vehicle : 2013 Jeep Wrangler Unlimited soft top Location in the vehicle: back cargo area Space available (Length x Width x Height): 37.5 x Any x Any Subwoofer make and model: SA-8 V2 Subwoofer Size: 8 inch Number of Subwoofers: 2 Type of Port (Kerfed, Slot, Aero, etc.…

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  17. Started by spljim,

    I wont to bild one of thes http://www.decware.com/whornok.htm for a set of 8's will the RL-i8 work in this tipe of box and what will the sield chamber be it ses to model a regular 4th order single reflex box to determine the rear (sealed) chamber but i dont have the program to do this i know the rli-8 is not out yet but i can wate for it

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  18. Started by Lschevy,

    can someone design me a box for two sundown audio zv.2 15's that will be going in a 04 impala here are the measurements W-35 H-17 D-30 i used the subwoofer calculator on the 12volt and i came up with 8 cubes

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    • 5 replies
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  19. Started by 02BlackOnBlackSS,

    Hey guys, I was messing around with some box plans, and for the recommended box for two rl-i 8's (.6 CF @35 hz) the port has to be over 106 inches long. That is almost a 3 CF port! Anyone know how I can get the length down some? Check my math, but I'm pretty sure this is right.

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  20. Started by knogoodidleft,

    Aight, Ive got 2 18" daily Fi BLs dual 1 ohm, with cooling and flatwind option. Then I got a sundown saz-3000d, iraggi alternator, and more 1/0 welding wire than you could shake a stick at. Now I have very limited box building experince, and I know someone that knows someone, that has some experince. But I think he is limited in proper port designing, maybe. He has a shop called 352 Kustomz, small shop, two guys, do some crazy custom stuff. Very skilled in body work. So they start grinding away on my project, Its going to be more of a show box than a performce one. But he keeps on asking me the "port size" recommendation from Fi. I told him 5-10 cubic feet @ 30-37Hz , …

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  21. Started by JakeDusangTM,

    say you have a box with the cuft you want to port it with but this box has a reallly strange shape will that change the port size,length, or anything at all? its going to be for a ssd 12 the box has 2.12 cuft going with a round port

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  22. Started by Dangrebel,

    Wassup fellas I am wondering if I tune my port to 33 hz could I change the tuning of it without switching out the port? Like adding something? I would like to keep it at 33 hz when doing rap demos and daily bumping but then when I use it for work I listen to rock cause of my boss cause he hates rap so tune around 38 hz or maybe a tad higher. I have an hdc3 18 and 8 cubes or so to build.

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    • 10 replies
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  23. Started by ANeonRider,

    Just checking pricing on various different places. What places do you guys use for your resin/matte/cloth?

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    • 7 replies
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  24. Started by Joseph M,

    which way should i do my box design for a btl 18'' with two 6 in aero ports. sub up, aero back?

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    • 7 replies
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  25. Started by Dice,

    I'm really confussed on ported box tuning and sizes can anyone help me work out some measurements for my enclosure i have two ascendent audio havoc 18" subwoofers , and two Orion D5000 amps to run the subwoofers . The size of the space I have is 34high x 20" deep 53" wide which is just over 17cuft i'f I've worked it out ok I would like the box 16 cuft and tuned for the lows because want to create hair tricks . The design I would like so I can make into a wall build . Help

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    • 6 replies
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