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SPL & SQ / Fabrication

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

  1. Started by sound=vibration,

    whats the max dimensions that will fit through a trunk of a mustang trunk opening... wiered ass trunks

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  2. Started by astein3,

    I have an optima yellow top right now and its used for everything, starting and audio equipment. I'm looking into getting a new battery and was wondering if I should buy a red top and use it for starter battery and use yellow top for audio. Any suggestions?

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    • 2 replies
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  3. Started by SoCalSQ,

    Here is a list of events we have scheduled for 2009 so far. There should be a few more added to this list within the next few weeks. If you have any questions please contact me at [email protected]. January 24th 2009 - Image Dynamics Sound Challenge Image Dynamics Usa 620 south Magnolia Unit C Ontario Ca,91762 866-933-1414 Formats: SQi and SQc Entry Fee: $30 and $50 for 2 formats February 15th 2009 - Beach Autosound Sound Off Beach Autosound 18042 Beach Blvd. Huntington Beach, CA 92648 714-848-5400 Formats: SQi and SQc Entry Fee: $30 and $50 for 2 formats March 7th 2009 - Audio Shoppe Last Chance Show (Last chance for west coast to qualify for finals) Audio Shoppe 676…

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  4. Started by swift,

    I will be soon upgrading my current sub and box setup in my F250. I am limited on space and think I can go 1.5cu without much issue or maybe even up to 2.cu if I add an extension piece. My goal here louder deeper harder hitting setup. Here is a pic of the space I can work with and my current box. 1 10in Fosgate p2 in .53 sealed. I can easily double the size of the current box or I can make almost like a L shaped box to utilize the lower section behind the pass side. Without using the the lower pass side I think I could do one that is (17in H.. 33in W.... 5in D1.....8in D2) this would be outside diameter and I will be using 3/4 MDF. This should be about perfect for o…

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  5. I'm assuming if i had one of those woofer testers to pull the T/S parameters of a speaker, it would pull different specs if i took a single DVC subwoofer and tested it wired in series, then tested it again in parallel. Well, i dont have one so i'm gonna rely on those experienced here to relay some info to me. I will be using 4 subwoofers, 2 subwoofers per amp. Each pair of subs are dual 1 ohm. I have 2 ways of wiring this- 1 - Parallel both subs then series them to the amp 2 - Series both subs then parallel them to the amp Is there a difference in SPL potential between the 2? this info is pertaining to a meter, not the ear. I notice when looking at specs of subs, in gener…

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    • 10 replies
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  6. Started by CBFryman,

    Awaiting a check for $450 and then putting a call into RE. 4 RE 8's 1.8 @ 34Hz dual 3.25" Ports under the seat of an '03 GMC 1500 Ext Cab. going to be powered by Pheonix Gold Octane R 8.0 Hoping for 140 on the AC. Which shouldnt be much of a problem.

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  7. Started by wof131s,

    I currently have 2 fi q 15s in my dakota and am now getting a Ram 1500. Is it possible to get these sub in there or will i have to settle for what everone else is doing and go with two 10's?

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    • 5 replies
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  8. Started by Branden2202,

    after building the enclosure, i want to paint the box, instead of using carpet. What kind of paint would i have to use. After im done painting it i want to add a shine to the box. I want it to be a shiney black color. What are the things i will need in order for me to achieve this goal?

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    • 3 replies
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  9. The magic numbers for the DCON 10 seems to be 1.25 cu ft, tuned to 32hz. Does the vehicle really have any significant play on that? I don't compete or anything. I just hear this thing really performs with little power. I've got all the components of my budget system except the sub and box. For some reason it's the hardest thing for me to decide on. I really wanted to get away with a prefab box, but they are all tuned around 38hz. What's the point of buying a decent sub if you're not going to maximize it's potential? Anyway, As far as box building goes are there any walkthroughs or step by step type guides? I can figure out all the dimensions and cuts but the assem…

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  10. Does anyone know a formula that can be used to calculate the optimal box volume and tuning frequency for a particular subwoofer using the T/S parameters given by the manufacturer?

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  11. Started by kamahaobuilt13,

    ok so i got a 4runner and im running 1000 watts for a skar vvx-10 that should be here in couple days. Howevers i built a box at 1.25 tuned to 30 hertz and too me it seems like a big box just for a single 10, so the question i ask is the box to big or not tune right for my 4runner thanks

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    • 6 replies
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    • 1 follower
  12. Started by Lschevy,

    I have some final questions for my box build. I wanted to use two 8" aero ports that i was going to run through the rear deck to the box. Both ports will have to be 32 inches long which is two long. If i switch to two 6" will that be enough port area for two z 15's? I need to switch to a smaller diameter ports so they will be shorter. What are the pros/cons of doing this?

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    • 4 replies
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  13. Short notice. Saturday August 9th! Xtreme Sound Cruise-In and Competition. 1701 Queen City Avenue Cincinnati, Ohio Registration begins @12noon... I'll be there with my TL running the SPL portion. We'll be doing a StreetBeat style, and a headrest SPL style... as well as cheap re-runs... -Noah

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  14. Started by madscientist,

    So I am thinking of venturing into unknown territory and build my first ported box. I have been doing a little research but am still learning. As I understand it, frequencies below the tuning of the box can cause the driver to "unload" which can cause damage. I am not 100% sure what that means, but I digress. I have read more than a few threads that say they tuned their box to 32 Hz and then go on to say that the low-end is amazing. Now I listen to mostly rap music, and it seems like to me that there are a lot of songs with frequencies below 32 Hz. There are a couple low notes in Jeezy's "Hypnotize" for example that I am guessing dip below 32 Hz. How is it that the box ca…

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  15. Started by sandsnip3r,

    Anyone know of which programs professional fabricators use...?

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    • 4 replies
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  16. Started by cLutcH,

    To have a loud LOW end and the SMOOTHEST transient response (not punchy) and DEEP overall which type of box should I get.

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  17. Started by bmr4life,

    Can I get away with using a single 4 inch port for my Icon 12? I don't have enough room to get 2 ports in due to the length. Lets assume the box is 3 cubes after sub displacement. Can be made smaller if that is optimal.

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  18. Started by adixon816,

    After searching for a subwoofer I have decided on the DCON 12" it seems perfect for what I am looking for. My question is regarding the box I saw the recommended plans were 2.25^3 at 30hz I think but I have plans already for a 2.5^3 box tuned for 35hz. Would the sub work well in that box or should I scrap it and just build the recommended one. I also have a 350 watt alpine amp, would it be ok to run the dcon at 350 watts? Thanks in advance for any advice/help. - Alex

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  19. Started by unclehulka13,

    I just recently bought a FI Q 12D1. I'm looking to have someone build me a box, but he recommended i get him some port specs. I wanna go 2.3Cu FT and tuned to 33 hz. Anyone know how to get the length/depth of the port? I'm completely new to ported boxes, any help is greatly appreciated.

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  20. Started by FiBl15,

    i designs thes box a while ago and cant remember the specs. my patience have wore thin figuring out the specs, so would someone mind lending my a hand? i need to know the volume and the tuning of the box, (btw, if the width of the port is hard to read its 2 1/4'') thanks in advance

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  21. Started by Briggiboy33,

    Alright well my buddy has a misubishi eclipse with 2 12" alpine type E's in it right now. He ordered two more today. So I dont have any dimensions but I want to make a ported box tuned to 31 hz. And probably 6 cuft. But should I make one big box? Or should I seal off the subs?

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    • 6 replies
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  22. box dimensions 38 * 13 * 15.98= 7894.12 in³ = 4.56835 ft³ tuned to 32hz Bracing with 1 in dowel rod up/down r=.5 h=15.95 3.142 * .25 * 15.94 = 12.5 in³ = 0.007233 ft³ front/back r=.5 h 12.97 3.142 * .25* 12.97 = 10.188 in³ = 0.005895 ft³ probably two of these.. perpendicular or parallel so this leaves either 4.553884 for parallel or 4.555222 for perpendicular, up/down and front/back plus sub displacement of .19 4.363884 parallel.......... and for port area, with 57.25 in² slotted, ~50% for aero is 28.625 in² so a 6in aero port will be about 13.62 in long with the flare, with 28.26 in² without. round is also about 55% more efficient than slot so.. i think all my math …

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  23. Started by c0smo kram3r,

    Ok guys, I'm gonna need some help with an enclosure. First, some background. I have a friend who everyone had him talked into buying the usual kicker stuff, but luckily I got to him in time. This will be his first setup. Anyways, I coached him through buying an AQ2200D (could have chosen a better amp, I know, but his budget was sort of limited and we didn't feel like going through the hassle of looking for used deals on others), an 18" DC Lv5, and all the other bits. Should all be getting here by the end of this week. Alright now to the enclosure: The vehicle is a 2005 Tahoe Z71 (captain chairs in the rear). Now I measured awhile back, but if I remembered right, it should…

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  24. Started by my97tbird,

    I have 2 12" DB Drives the model number is: PLW12D4. I would like to know what the total dimensions for a box should be like the inside area and the LxWxD should be? What should it be made out of? How the port should be and where the port should be? how many Hz should it be for the best possible SPL? Also, the box is going in a 1997 Ford Thunderbird. Right now I have the subs each wired to there own amp and the amps are Crunch Pzi1500.1 so are these amps good enough or should I look into buying a new amp, If so what amp? The subs are rated as follows: 2000 watts total power and 1000 Watts RMS. I don't think I am powering them to there full capacity. So any sugges…

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    • 1 reply
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  25. I don't have a disc to install windows on my mac, and I kinda want to use my TermLab. Does anyone know how to do this without using bootcamp or a visualizer?

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    • 4 replies
    • 763 views

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