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SPL & SQ / Fabrication

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

  1. I had a place build me a box and i gave them website to check out the specs, i just wanna make sure everything was done properly before i go ahead and accept this box. fits perfectly in my trunk (he measured before he made it) my subs are still being manufactured... so i have time to correct this if not. any pro response would be appriciated. H 14" x W 32" x D 24" is the overall outside dimensions. im not sure what he tuned the port to. the outside of the port is 12.5"x3" if you need more measurements id be more than happy.

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    • 22 replies
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    • 1 follower
  2. Started by Aaron Clinton,

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    • 8 replies
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  3. Started by Tony Nelson,

    I am curious whether or not a 220 Amp alternator would support a Sundown Saz-1500d v.2?

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    • 28 replies
    • 3.1k views
  4. Started by porkchop,

    should i download winisd or winisd pro?

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    • 34 replies
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  5. Started by harveywong,

    I have a honda accord 99 with a trunk vent (8"x3" slot) behind the paneling on the driver side. I notice the other day that there was a lot of air leaking through there when the bass note hits. Would sealing this up help with spl and is this bad for the car? My box is in the trunk sub and port facing back. Just wanted to know if anyone had this problem and what did you do to it?

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    • 13 replies
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  6. Started by Miles,

    Well, It's been a while since I've been on here. Graduated college and disappeared from the scene to start a career, which lead me to 3 states in 3 years. Finally got a vehicle I've always wanted: an SUV! Picked up an Alpine MRX-M100 on Craigslist for $50, and just bought a new Fi Alpha v2 15 yesterday (hopefully that comes in before the new year). Definitely won't be as heavily involved in the SPL scene as I was years ago, but I think I might just make something to have some fun with at a couple of competitions next summer. Here is my plan so far, and I would like input/feedback for anyone that has worked with a Renegade before: 800-900 wrms realisticall…

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    • 4 replies
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  7. Started by fritosaregood,

    I just finished a build on a trans line box, Its a 1/4 wave 33 hz. But i thought i had read some where that 1/2 wave trans lines were better, but impractical for space. so i thought i would make a box with a 1/4 wave at 33 for daily and 1/2 wave at 66 for comps, but from testin the box in my house the box getts really quiet after about 40-45(guesstimation) when using a reasonce test song, so was my idea of a dual purpose box dumb.. and are the only good trans line boxes 1/4 wave boxes?

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    • 18 replies
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  8. Relatively new to these kind of speakers(power hungry, big foam, high excursion monsters). Used to my old Orions and JBL GTI(the real ole ones that were based on pro drivers). Anyway, picked up a pair of these Eclipse SW8122DVC...spec sheet here(found in a different thread on this forum....TYVM) http://www.cartoys.com/cartoy/pdfs/Eclipse_spkr_manual.pdf The sheet seems to call for a sealed box.....but I have a feeling that a slotted port might be a good option too. I am shooting for a SQ system(yes I read here that there is no such thing as """""SQL"""""....lol, and I get the point, but I have had plenty of SQ systems that got REAL loud....sorry, it w…

  9. Started by Maggotpuffin,

    Im Helping a friend design a box he kinda wants a half wall. Two subs inside the cab ( no rear seat) and two in the trunk area. My idea is 3.5 cubic feet per sub about 55 cubic inches of port per sub. It will b one big box but inside it will be like each speaker has its own box and they all have their own port. So i suppose 14 cub ft internal after sub and port displacement and overall about 220 cub inches of port how does that sound any advice is appreciated. He has none of the equipment yet but he wants 4 cvr 15s and for power either two kicker kx1200.1 or one zx or kx 2500.1?

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    • 11 replies
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  10. Started by Briggiboy33,

    I might be buying a jeep wrangler in 6 months after this semester of school. Currently I have a ssd15 and I was looking at the jeep and I don't think I can fit an optimal box for the 15 in there. I was brain storming and I came up with an idea. I would take the rear seats out and make a box for two 12's facing forward with a big old port in between them. And build a seat on top of the box. Now should I recone my 15 into a 12 and buy another? Or should I sell it and buy either 2 sa12's or 2 Fi x12's? I am going to run a precision power bk1300.1D. And a set of Polk db 6.5 components off a power bass xax(400.2?) 100rms at 2 channels. All help and advice is much appreciated. …

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    • 7 replies
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  11. I am about to get a really good deal on two AA Havoc 12"s soon. And I havent got the room for a full ported box in my truck for two 12s. So heres what i'm doin. I've designed a box which is right around 2.5cuft before driver displacement. Idk how or what role the size of a sealed box plays with output or with quality. The box looks kinda like this. /l Ll It is 36" wide x 22" tall x 10" deep. With the front of the sub having a 45 Degree face starting 12" up the front size. I'll upload a pic in a few to clarify as much as my lil sketches possibly can. Also a double baffle design. Any info or help would be greatly appreciated!!

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    • 25 replies
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  12. Started by Chinbruiser,

    Okay guys hope this is in the right spot! I didnt want to post this in the fabricators thread but anyways here we go. I'm wanting to purchase a box design for 2 12 L7's. The only dimensions that matter is I dont want it over 20 inches tall and over 48 inches wide and 16 deep. I dont want to do a basic slot port or aero tuned port. I'd rather do a TL or something of the sort. All I want to purchase is the design not the box guys. Something cool and out of the ordinary. Thanks in advance guys!

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    • 30 replies
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  13. Simple. All anyone would have to do to receive competitor pricing is say "i do local comps". Hell if this were a way to get dealer pricing or even near it EVERYONE would say so. This kind of marketing is not in the companies best interest in any way shape or form. MSRP is where the money is at,.....period. What makes a person a decent candidate? One who actually listens to the questions he has asked. Done his homework, built 3026 different enclosures, pissed off his wife, neglected his kids, spent his college money, given up all hope of daily music, uses a product that can actually "get loud", is prepared to spend 1/4 of what he makes on traveling/admission/equip…

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    • 19 replies
    • 3k views
    • 1 follower
  14. Started by Davo2378,

    OK as of right now my box this like this. And now I wanna do this to it, if I take 1" out of the top and make it 18" tall it will make the box 7ft^3 net, and now i take 3/4" mdf and put is on the inside of the port and make the port 4.5H by 18.5W and keep it 16.5D It should tune it to 35Hz. The red is the new MDF in the port can I do this and will it work?!?!?

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    • 17 replies
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  15. I got bored with my Skullcandy's, they sounded like asshole (and still do when not on the amp) but I was wondering, if doubling up on drivers might help the bass response; I split up a few cables and ran them to my HT amp, and they sounded much better, but that is not the kind of thing you can lug around for casual listening; I was thinking of getting two pairs of 50mm drivers and mounting them in place of the existing drivers, to see if a little more area helps; the bass only got good around xmech of the drivers currently in there, tried to get funky and had to back it off to prevent the coils from shredding. Anyone know of a reliable brand of 50mm speakers? I was g…

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    • 29 replies
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  16. Lately I've been pretty frustrated with my sub stage in my vehicle. I am not any kind of box designer but I can and have built my own from others blueprints. I've always helped my friend with systems in his 08 Grand Prix. I have installed a lot of my enclosures in his vehicle with good results. Then I put the same boxes in my vehicle and get something totally different. Every vehicle is different I understand this. We both have trunk cars. Mine is an 11' Malibu. He clearly has a slightly bigger trunk than I do. What I'm looking for is a better low end. The boxes I've used have all been tuned around 30-32ish. What do I need to take into consideration to build a box to ex…

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    • 33 replies
    • 3k views
  17. Started by phresh,

    The SQ of the Qs are great but I want to know want the size and specs of a box that would maximize the dbs on daily music. I would think that the max ported box specs at 32hz would do that but would a smaller box be louder? And I know its "install dependent" but just want to see what others say.

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    • 33 replies
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  18. Started by Booming_Creation,

    Ok we are in the works of having a show at the end of march or early april. depending on the weather... This time we will have 2 meters. head to head competition to see whose louder. We also plan to have an sq portion to the competition for all the sq heads out there. How many would be interested??? We are talking about having one every month in the spring and summer months. maybe some nspl and iasca shows we need feed back!

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    • 31 replies
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  19. Started by Rozon420,

    just broke off the spoiler on my 93 civic hatch with the bass, even caught it on tape. wondering if a new carbon fiber wing will last longer or if it will just break faster?

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    • 25 replies
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  20. Started by zshortcut,

    hey guys, i need help making the design for a optimal sealed box for my 2 12's. http://www.soundsolutionsaudio.com/index.php/product-information/icon.html\ the problem i have is i have a rather small vehicle and the space the box has to sit in is 33" wide and 18" high but to get it in the tallest it can be is 16" if anyone could build me a diagram or point me in the right direction it would be a HUGE help. thanks in advance, zack

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    • 26 replies
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  21. Started by superfishbone,

    here in the philippines, there is a 10" challenge for car audio shops.. who ever can make the RE MT10 hit 150+ DB gets another free MT10.. restrictions are: single MT10" on trunk 1amp 1extra battery me and other shop owners tried it.. amp used: AAMP monster 5kw box: tuned @ 45hz wires: guage 0 stinger wires extra bat: stinger SPV70 first the MT10 on the term lab it hit 146.2 we tried the same setup on a FI BL fulloption.. on the term lab it hit 148.6 how did this happen?ö?ö?

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    • 29 replies
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  22. Started by jonbearsmt,

    alright... so i dont have back speakers any longer... . and long ago a few guys here jimjm5 im not gonna name names told me to drop my rear fill. well now i have a sexy sundown 4 channel and and my front is in need of a filling sound. i listen to rap.... so sq is funny for my goals right... but lets talk about it. im gonna get some http://cgi.ebay.com/6x8-5x7-to-6-Speaker-A...1742.m153.l1262 and some deadener.... open to ideas.

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    • 27 replies
    • 2.9k views
  23. Started by B7L|BL4Z3R,

    So i have been reading on how to calculate the tuning on a box with a kerf. What is a common kerf radius? and how to you cut the wood to become that radius? google isnt really helping me out here. i know there is some extremely good carpenters here that might be able to help me out. how deep do i cute to wood to cause a certain radius. i would like all the input you guys have on kerfing to help me figure it out completely. Thank you.

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    • 26 replies
    • 2.9k views
  24. Started by djjdnap,

    18in Sx btw . Ok, I got 17.31cuft to mess wt here 43.5x27.5x25. The box is gonna be ported to idk 32 sounds like a good number. Suggestions? It will probably be dual chambered, wt the port on the end. Is that to big or not big enough is my question. It says it only needs 6cuft for sql, so i guess 8cuft for one sub isn't that bad.

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    • 31 replies
    • 2.9k views
    • 1 follower
  25. i am planning on upgrading my system, but im still undecided if i should make it ported or a 4th order box, what will be the pros or cons of each, and what would be better it will be a blowthrough on a silverado, planning for 4 15" dc lvl 4 and a dc 5k, but right now i just want to build a box first, thanks

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    • 9 replies
    • 2.9k views
    • 1 follower

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