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SPL & SQ / Fabrication

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

  1. Started by team bahamas,

    what type box would you suggest for a sq setup i know the norm is sealed but i've heard a few ported boxes and they sound pretty nice give me some of the pros and cons of both btw subs being looked at are idqv2 12" IA LI 12" and SA-12 thanks for any heip provided

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    • 5 replies
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  2. Started by bigtoysr4us,

    Hey SSA Members I have 2 Mtx 9510-44 that I am looking to design an enclosure for, now I'm not to sure if its possible but I think it is, I would like to be able to do hair tricks, for power I have a Lightning Audio 3000 watt mono amp which is putting out a steady 1900 watts, the car is an 03 cavalier with factory electrical big 3 and two optima red tops. I'd like to fire the subs forward and possibly run the port on the rear deck lid sealing off the trunk from the cabin. my max dimensions are 36x16.5x24 I dont think it needs to be that big but I am new to hair tricks so I need some direction Thanks everyone.

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    • 8 replies
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  3. Started by Peteyglad,

    What has been your favorite show you have attended, not necessarily competed in? I would say the best show (besides SBN) would be the first show at Ft. Drum, NY back in July of '00. It was a smaller IASCA show hosted by Terry Floyd. There were maybe 25 or so SPL cars and about 10 or so SQ cars. I met a lot of people at that show that wound up being good friends. Highlights from the show. I had the high SPL for the day at 151.0 I caught my car on fire! 2 of my other buddy;s got 1st in their respected SQ classes Here is a buddy's truck that won one of the pro classes. He went on to IASCA Finals that year. Real sweet truck.

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    • 4 replies
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  4. Started by lithium,

    my friend is getting a 10" type R (powering it with a kicker 400.1). he's trying to keep the box as small as he can so i was thinking about using a flare tube port for the box. what diameter should we be looking at? any suggestion? (sub isnt purchased yet. but i havent seen anything better for 100 bucks shipped) edit: damn i think i put this is wrong section... please move if it is

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    • 10 replies
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  5. So like it says how do you figure out the right measurments for 2 or more round or square port? and im asking because im thinking of doing a dual L port design for a 12" BTL. box will be tuned to 34 hz and will be 2.5 cu ft after displacement. so how do you figure out length and port area for each port? also if you know how ot do the circle ports it would be nice to know that as well. because i might end up going the aero port route.

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    • 7 replies
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  6. I own the following items: http://www.kaptionaudio.com/manuals/SPLManual.pdf ( I have the 15 inch) http://www.kaptionaudio.com/manuals/KaptionD-Class.pdf (biggest amp they make) I am trying to build a loud, clean system. The dimensions and information are in the pdf for the sub. Now, I listen mostly to rap, some rock but mostly rap and otherwise a mixed back. I believe sealed is the way to go because I like the clean, clear bass... I will be leaving in the third row of seating in, but have it flipped up (or maybe I should take it out). I need to use the space above the sub for the transfer of some goods etc... Should I center the sub, put it towards the rear seats or t…

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    • 5 replies
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  7. Ok so my buddy is putting 2 old school JL W6 15's in his extended cab frontier. About how big should his box be, he wants to go sealed. And which way should the subs face? Towards the back of the seat or facing up??????

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    • 8 replies
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  8. Started by BlackedoutAvy,

    Just brought home my second first place trophy in as many competitions. Little higher this time. 150.1 In modified 901-1600.

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    • 5 replies
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  9. Started by Chevy350TPI,

    http://www.audioholics.com/techtips/audiop...ples/cables.htm

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    • 7 replies
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  10. Started by bolo88,

    What size enclosure would best suit a 15 L7 for spl and tuned to what frequency

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    • 10 replies
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  11. Started by rythe88,

    I want two 15 in icons in my trunk but idk if i have the room. I want a ported box. Trunk dimensions are 4x3x1.5. Amp is crescendo bc2k if anyones wonderin

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    • 11 replies
    • 1.2k views
  12. Started by imhungnurnot,

    First off, can I count on port end correction to lower the tuning freq of my enclosure? For example, NET Vol. = 2.6 cuft. or 4493 cuin. Port: 12.5" wide x 3.375" high X 24" long without end correction, (port length = 24") tuning = 38.58Hz with end correction, (port length = 25.6875") tuning = 37.52Hz I know 1Hz difference in tuning isn't really audible (but the end correction factor will differ in different situations i.e. port height, etc), but I want to know if the end correction factor actually exists!!!! Secondly, I'm about to build a box for one DD 9512g. DD recommends 42 in^2 port area with 22 port length with 2.6 cuft NET vol. which yields 39.97 Hz tuning …

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    • 6 replies
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  13. Started by thebiggmann12,

    hey, im thinking about building a pretty loud setup with just 1 bl 10. its gonna be for competition use only, just for the hell of it lol. its already in a good daily box...but i kinda want to build a burp box since i have 3/4 of a sheet of mdf laying around...im just kinda lost at what to tune it to. ik im supposed to tune high, but how high? i have no idea of what my car peaks at tho, since i dont have anybody around here that uses a termlab. i am using a hifonics 1610d and will b running at 2 ohms on it so about 1200 watts is what the amp puts out. it will be a box for competitions only, so if anybody has any ideaso of what to tune it to that would be great. also, its …

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    • 14 replies
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  14. Started by SPL_Man,

    can a fully loaded BTL 18" take for SPL burps ? provided with of course the proper ho alt & batteries need some info for planning a set for comp use

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    • 11 replies
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  15. So ive currently have got an Fi SSD15 in a 3 cube box, ported tuned around 31 hz. it murders the lows, and theres no port noise that i can tell despite it having only about 11 sq inches per cubic foot of box volume. the problem is, there seems to be cancellation in the 50-65hz range. it hits great below that and even gets louder over 65hz until it starts rolling off around 85hz. this is in the trunk of a 2001 BMW 525i. i have the sub fired up with the port back. im very frustrated with this lack of a crucial sub bass octave. i'm about to build a new box, in the neighborhood of 4 cubes with a port tuned around 35 hz, with at least 14 sq inches per cubic foot of interna…

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    • 1 reply
    • 1.2k views
  16. Started by mikee72,

    hey all i just got metered at the florida spl/ db drag event in clear water and managed to hit a 133.6 on the TL with an fi x 12 and 350 watts. ooo and everyone should really experience mp3 pimps car first hand it is REDICULOUS!!!!!

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    • 9 replies
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  17. Started by [email protected],

    So im making a thread that may help people in the future on different enclosures for different applications. So what are the physical differences in an spl enclosure compared to a daily driver enclosure or sq enclosure? What separates the two into different catagories? for example does a box that is bigger and tuned high make it a spl enclosure or vise versa? Thanks in advance for your expertize.

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    • 8 replies
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  18. Started by vladd,

    Ok so speaking purely visually, i understand a basic motor and the LMT but XBL^2 i've never seen a good pic of, what exactly is it and how does it differ? what pics i have seen, i can't tell the difference from a normal motor. Now, someone explain in some more depth for me, or point me to a good link, the way the magnetic force helps hurts the voice coil movement. I'm not understanding why a lateral force is necessarily a good thing. Next, why is the cone concave instead of convex? Has anyone ever experimented with flipping the cone over? What affects would this have on the frequency? Obviously i'm procrastinating studying and my mind needs anything else to think abou…

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    • 6 replies
    • 1.2k views
  19. Started by Frostedflakejake,

    So after taking a bed apart a few days ago i discovered the mass use of MDF used in the bed's structure. Now if i wanna build a box for my 18" btl, people always say use 1/2" MDF. How important is that 1/2" ? Why does it need to be that thick? For structural/support reasons? the MDF from the bed is 3/8" and i'm going to go buy the 1/2" just because everyone on here says to do it and i trust them, i was just curious. I have like...50 square feet of the stuff.

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    • 10 replies
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  20. Started by djtomczak,

    My dad has an E8v1 in his van in an old box that was from a component set, he needs a new box. I have leftover wood from my box so I thought I might as well use it! Using sundowns recommendations I figured .6 cubes with a 7x2 PVC aero port. My question is how much port area should it have and what frequency to tune to. He listens to rock music, should I even port it?

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    • 1 reply
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  21. Started by jdawgg22,

    okay, so I drive a 1995 honda prelude. I just got my nightshade 12 about two weeks ago =], I am running it with the saz 1500, I have also done my big three. I feel my nightshade isn't at the full potential but, it could just be my box. Off the top of my head I can not tell you my demension, all I can tell you is that its 2cuft at 33hz. I am planning on building another box very soon. I would like to know what input anyone has on they're 12" nightshade and there boxes and how they sound, also anyone with a prelude and where the have there sub mounted and the port faceing. Thanks, Jordan

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    • 8 replies
    • 1.2k views
  22. Started by sps1989,

    I have 4 Sundown Sa-8 V2s that I am thinking about putting in a 4th order box and I have a few questions about how to design it. 1. Do I use the manufacturer's specs for the sealed part? 2. What is the best ported to sealed ratio for a box that I would like to have an output of 20s+ hz? 3. Would tuning the ported area to 45 hz give me the best range in frequency response? (Maybe 20s-60s or so)

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    • 2 replies
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  23. Started by ramos,

    For the past couple of months I have been playing around with imaging. been reading everything I could get my hands on, even picked several brains along the way. I started my project with simple goals in mind. But after listening to others systems, as well as my own. My goals keep getting raised I built the kicks allready. Temporarily using a pair of $1 crunch midbasses ( I love yard sales ) and a pair of large format PE silk domes. Simple inline crossovers. powered by an rf 200a4. To my amazement, and a few others. The sound was rather nice with no processing what so ever. So my goal has now changed once again. I was originally building towards a single seat soundstage…

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    • 10 replies
    • 1.2k views
  24. Started by El_dorado,

    Sup guys I have a few questions, I've seen so many different types of enclouser's for example Round ports Slot ports squared ports port for each side individual chamber Ok for my subs I have 2 12" dvc subs punch my max dimm. are 34 wide x 15.5 height x 17 depth all pieces are cut out already I want to know how ??? should I make my port round, slot ported, port in between the middle. tuned around 32 to 35 hz so that's about it so can someone please lay a hand on me all info would be great thanks to all....

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    • 8 replies
    • 1.2k views
  25. Started by JoshM20,

    Hey guys, I am gonna start a few projects and try and glass a few things, I want to put 2 8's on my rear deck and something upfront to put the tweets on the dash. I can't put them in the A-Pillars so I was going to put them in the corners of the dash and I want them to look clean. I was wondering what kind of resin and bonding agent? I think you mix the resin and something else before you put it on the fabric, I read about it a while ago and I will go over it again because I don't remember much. Just thought some of you guys would have some tips on how to do this... I've got some pretty good ideas to actually design it but I will touch back to see if it is plausible... …

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    • 6 replies
    • 1.2k views

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