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SPL & SQ / Fabrication

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

  1. Started by ATF,

    Looking to see if anyone can design a box for me. Gimme a layout and dimensions and whatever else would help. Don't know if anyone on here just does free ones because they like to help people? or charge a fee. Just let me know if you can help me. It would be for a single Xcon18. Thanks

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  2. Started by clab333,

    Building a new box for 1 15". Was gunna make it an abnormal shape as opposed to the everyday cube. I've heard that less parallel sides results in less standing waves, but I don't think it would be too noticeable in car audio. Anyway my point is wanting opinion on the ideal shape of a box. Also plan to port it. Thanks.

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  3. Started by Joey laughlin,

    I have two DC audio xl 12s just built birch box after diplacment im setting at 4.03 cubes have good electric running skar 4500 so they are seeing 2200 to 2500 rms each here were i need a little help they will be in the back of 2014 Lincoln navigator i have material for 2 4” round ports were should i face subs and port location and whats the best tunning for these subs

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  4. Started by nick_19,

    I'm designing a new box and have a sort of kink in my design. I'm looking to do a baffle with a 30 degree angle in it. Now the issue with this that I do not know the clearance for the sub since it will be angled downwards. It is a 15" Havoc (standard basket), and I just wanted to know if anyone had any ideas about the clearance. I basically need to know how far above the bottom of the baffle the sub needs to be to clear the bottom piece. Thanks!

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  5. Started by haydenlake,

    Okay, sorry I can't upload pics of my fiberglass project right now (I'll try later) but I had a question. The situation -didn't use enough hardner on the fleece and it was still gooey when I came back 24 hrs later. -I tried just smearing plain hardner on the sticky resin and that seemed to work okay -then I made my next batch of resin pretty hot (meaning lots of hardner) and layed two layers of 1.5oz. Now the fiberglass is as stiff as normal and when I stick my hand in the box and move it around I don't get anything wet or sticky, but its still smells like resin really bad (its been dry for 20 hrs) The questions: "how long does resin continue to smell." "Does a complet…

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  6. Started by SaxMan,

    alright so i think im going to be mounting my future amp to the back of a seat. is that bad? and also what material is good so the amp doesn't rattle around.

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  7. 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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  8. Alrighty, I think I have the new design down. Going to be 4 Se 12' in 8cu.'s after displacements. Powered by 2 SAZ-1500's strapped tuned to 35hz. After doing alot of reading,searching, and math I have come to this: 3 6" aero's ( around 92 sq.in. of port total) for a length of each port to be 18.94"(19.94 overall). Should I have more or less port? I have read and searched through quite a bit of the posts. Some of the math and that calculators I have used said I need around 138sq. in. of port. But I have read that when using aero's you may only approx. need 2/3's of that. So with that in mind what's your opinions. If this is wrong can you point out some more pla…

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  9. Started by brian1985,

    I'm having trouble designing a box for the two Dreadnauts I'm getting in April. I don't know if I should have both of them in the same box or have two so they take up less space? I would like to have them in separate box's that are taller and narrow so I can still put stuff in the back of the suv. But when I try to look up the Recommended Enclosure I don't understand it. if someone could give me some pointers I would be thankful. I have never made a box before so this all new to me I will put all specs I have on the subs. Recommended Enclosure Vented (Net) Port Specs …

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  10. Started by RL-i8_Mr._Jones,

    I built my box fits good....but the damn thing is to tall lol so i got to rip it aprt cut the rabbits and fix it pisses me off took 2 weeks to make and i fudgeed up but owell itsmy first box

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  11. Started by antonmiller,

    On the Termlab im hitting a 144.3 sealed up at the dash with a sweep. its in a trunked cavalier. i just want to know if i can get that score a little bit higher? would holding the trunk lid, sunroof, or doors down during a run help? would more room for air to get into the cabin help? does subwoofer box placement help, meaning how far away from the trunk lid it is, also how about rear seat folded down half way help? how about front seat positions? kind of just trying to get as much of an edge as i can. with the 144.3 run it was all set up for daily driving, not much tuning done at all, as in i didnt play with box position, or seat position or anything like that. i just k…

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  12. Started by Curtis96olds,

    im trying to design a box for 4 sa-12's and i want to make sure its not too big. its 8.5 cubes after all displacements with 108 sq inches of port area. ill be powering the subs with an AQ2200D so each sub will see roughly 550 watts, which is why i made the box slightly bigger then normal, i just wanted to know if you guys think this sounds ok. ohh and it will be tuned to 32hz

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  13. Started by xAndrew225x,

    I've always painted my sub boxes and thought i might try giving carpeting a go. I was wondering where you guys buy you carpet from? I'd like something cheap, but of decent/good quality. (doesnt everyone. lol) Thanks in advance

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  14. Started by alain,

    I currently have 4 cube after all displacement with 43.75 sq/in of port fireimg down the middle tune @35hz. I was told that offsetting a port to any Side would raise enclosure efficiecy And get louder.how true is this? my new plan is 3.8 cube with 50sq/in of port tune @32hz with the port off set. sub are fi btl12 n2 with the mmats hd4000.05 and dc xp 270 alt x3100 in the rear xs2700 up front in a 03 impreza sealed off from the trunck.

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  15. Started by Lucky 76,

    me and my friend made a ported box tuned to 28 hz ... we followed the volume according to the specifications of the subwoofers (2 12" pioneer premier ts-w3002d4) ... we made 2 separate 1.4 cu ft boxes ... the output is not what we thought it would be ... we want it to be louder and maintain sound quality ... what size cu ft box should we make to get more output? .... should we combine them into a single box? ... if so how do you do the portwork insde?

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  16. Started by Jordantyler,

    alright guys.. what are some good ways to carpet ur boxes.. like techniques.. or whatever.. what matterials do i need to use besides carpet haha ..

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  17. Started by casedawg350,

    i need to build a box around 2 cubic feet tuned at 33 htz with a maximum height of 17 inches, does this look right? also, sub up/port back or sub/port both back?

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  18. 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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  19. Started by loud lincoln,

    i want to wall my lincoln but first i need to make sure i wont get a ticket if i do have a wall. any one who knows about that kind of stuff any help would be good.thanks in advance

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  20. Started by fogged306,

    Is it possible to to a T shaped slot port? I'm designing a box right now with 2 woofers and no divider. I was planning on making a L shaped slot port off to one side of the woofers, but got to thinking about putting the port in between the woofers and making it shaped like a T without a divider in the middle. No clue if this would work or if the velocity of the air coming from each side would create turbulence where they meet and make the port less efficient. I would put a divider in but I'm limited on space and a divider makes the port length longer per side and cause me to increase the size of the box to stay optimum and the dimensions are larger than I have to work wit…

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  21. Started by HCCAfan,

    as topic states, who is going? competing or spectating? Me, competing in 601+mod, gonna get my butt handed to me but its all good.

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  22. Started by kysfinest,

    if anyone knows were or who makes 8 inch aero ports please text me 606-875-9811 thanks

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  23. Started by manrossdamn,

    I'm going to build a box for a buddy of mine that has a 1988 Camaro Iroc-Z. It's not going to be in the wheel weld as of other boxes. But right behind the rear seats. In this picture where the amp is located, there will be an enclosure for them, and it won't cover up the whole trunk area. I am going to use dual 4" Areo ports, and I was wondering how long will they have to be to have a tuning of 32-32hz. I'm thinking 1.6-8 cubes in total for both subs, and the amp I am using is a Polk Audio 4channel 800 watt amp that will be bridged to run at 4 ohms. The aim is mostly for SPL since there is no true SQ. But he would like to be able to listen to a variety of music, such as:…

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  24. Started by dbALPINE,

    if you got a question just ask more than happy to help and if i can't i find the answer for you

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  25. 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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