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SPL & SQ / Fabrication

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

  1. So I'm in the Midwestspl local and I'm going to change my class to nationals and was wondering if any body on here is from the same group "Midwestspl" that in the basic 4 class that can tell me how tall my box can be I know it to the window line but my 2005 tahoe has to different window line heights the side window is higher than the back hatch window...more ? To come once that one is answer.

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    • 21 replies
    • 6.5k views
  2. so im gonna go active again.. im going to use the new sundown neopro8's head unit us going to be a Pioneer FH P8800BT not the bestfor active but its what i have. amp is sundown 100.4 v1 so im open on tweeters... i used these https://www.madisound.com/store/product_info.php?cPath=45_229_324&products_id=1466 last time.. they were decent, and small... and i could mouth them with out alot of custom work or cuttin a 3 inch hole! but im open to seeing what advice is giving. i also wanted to ask a few questions. last time i went active i bought 3 sets of tweeters before i got dialed... i would LOVE not to do that this time. so would these help me stay out of rang…

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    • 56 replies
    • 6.5k views
  3. Started by spanky1975,

    Wondering if anybody has seen the cargo area walled ? I don't want to lose my back seats in my Tahoe. I am wondering if 4 15" SSA DCON's walled in the cargo area would do some good hair tricks ? Thanks for any input !!

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    • 29 replies
    • 6.5k views
  4. Started by krb1991,

    In my 2003 tacoma single cab and bench seats doubtful i can get two tens ported. Car audio dealer told me it wouldnt sound good with ports on side of box. So am think of one ten ported or two sealed

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    • 60 replies
    • 6.5k views
  5. Started by BTL15,

    Hey guys It's time for a new box and while I was looking around I came across PWK Designs. Has anyone dealt with this guy yet? Looking at his youtube videos and his official site it looks like he takes everything into account. If anyone has had a box designed by him let me know what you thought about his services and was it worth it?

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    • 15 replies
    • 6.4k views
  6. Started by A.SMALL,

    I currently drive a 2006 galant and i have been having trouble with getting upper bass( about 50hz and up) out of any setups i have ran. Any where above i say about 50hz is extrememly quiet, while anything below is gets low & loud, .... Set-ups i have ran include: 1. (2) infinity reference 12's -kenwood 9103d @ about 500 R.M.S. - 1.25 Sealed each before sub displacement - rear firing 2. (4) Pioneer Champion Series Tsw-304 - Kenwood 9103d @ 1ohm - about 800-900 R.M.S - about 1.1 sealed each after displacement and bracing - up firing sealed enclosure Current & temporary setup: (1) Kicker Cvr 15 - Audiop…

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    • 30 replies
    • 6.4k views
  7. Started by PT3005,

    Im going to have a custom box made soon and was wondering what is the difference between a slot port and a kerffed style port? Well there be any difference in bass?

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    • 19 replies
    • 6.4k views
  8. Hello today i went to my local come depot and they didnt have mdf wood all they had was particle wood, if anybody knows where can i get 1 inch mdf wood at please let me know I AM A be building a box for my btl 18 pretty soon thanks.

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    • 11 replies
    • 6.4k views
  9. Started by oakteg21,

    Who has a box design already made that can fit 3 skar audio vvx 8s? I'm new to box building so don't know how to design one on my own looking for something someone has already design. Please any help will be appreciate it. It would be going into a 2000 Acura Integra ls. From some research I've done of maybe how big I want the box is hieght 14", width 28", and depth 18". Tuned to 32hz.

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    • 65 replies
    • 6.3k views
  10. Hello and welcome to my version of the “How to Build a Custom Subwoofer box Tutorial”. This tutorial aims to teach you not only how to create a subwoofer box but how to add additional styling and design to make it a one of kind masterpiece. This is a four part tutorial series; a brief description of each part is given below and accompanied with a video and pictures. Enjoy! Part 1: How to Build the Box In this first video I cover the basics of a box design, incorporating bracing and 45’s and construction techniques. Part 2: Customizing the Box This video covers the design and production of custom template created insert shapes that mount to the fro…

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    • 4 replies
    • 6.3k views
  11. Started by dexter,

    I have an RE Audio SX 18. I've heard rumors that this sub can do 2,000 watts RMS fairly easily in the right box. I currently have about 500 watts going to this sub in a 10ft^3 box tuned at around 30 Hz. It's pretty loud. I got pulled over a few days ago for having my music too loud and the officer said "Dude, you were shaking my car, what do you have back there?" Got off without a ticket . I wanted to step it up a notch so I just ordered a Hifonics Brutus BRZ1700.1D. Which does 1700 RMS @ 1 ohm. I designed a box with a net volume of 7.19ft^3 tuned to exactly 34 Hz. Sub up, port back. (My old box was sub back, port back.) For the record, this is going in a 2006 Expedition.…

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    • 39 replies
    • 6.3k views
  12. Started by morgan8119,

    I'm looking for two tens to put under my back seat, can anyone give me suggestions on subs and who makes a good box for my 2010 silverado. I would like good SQ.

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    • 57 replies
    • 6.3k views
  13. Started by Paul Ernstzen,

    Hi all,has anyone built these ports and where can i get the formula to calculate the area and cutting angles please

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    • 32 replies
    • 6.3k views
  14. Started by BanginGMC,

    I need helping figuring out how to go about getting 6.5s in the doors of my 86 GMC Sonoma. As some of you might know that S Series trucks (S15s and S10s) around that year didn't come with door speakers from the factory, only dash and back panels. I never fiberglassed before so if possible i would like to stay away from that.. but if i must i will take on the challenge, if i could get away with just putting a sheet of MDF on the door and cut holes for my 6.5s that would be great.. but i don't think there is enough space between the door and where the MDF would sit because there was no speaker in before hand so GMC didn't give it the room for speakers so somehow i have to m…

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    • 38 replies
    • 6.3k views
  15. Started by ShagggDiesel,

    I haven't had much experience with the science behind port tuning/building, but I've been doing a little research and some calculations and have a question concerning port "size". Let's say I have a 1 cu.ft box, and I want to put a aero port in it with a tuning of about 33hz. I used a calculator and I came up with a 2" diameter port with a length of 6.3 inches.. or a 3" port with a length of 15+ inches.. My question is, what's the difference in having the 2" short port as opposed to the 3" long port and achieving the same tuning? To me it would just seem logical to go with the small and short port to save space and material, and just be an overall convenience.. but this i…

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    • 11 replies
    • 6.3k views
  16. I've never built a box before so here go. Starting the build tomorrow, are there any changes I need to make?

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    • 26 replies
    • 6.2k views
  17. Started by KickinAudio,

    Anyone know where I can look at pics of pods? I'm having some started today for my jeep. I'm not building them myself. Is there anything I need to be aware of or tell the person making them? I don't know jack about them. I'm installing my Kicker RS6.5 component set in there. I'll probably mount the tweeter in the co-ax. Any comments, opinions? Me competiting in db drag street class means I can't have anything large or alot of glass on my door.

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    • 48 replies
    • 6.2k views
  18. Started by Booming_Creation,

    Here is the start of the kicks built by ramos himself. dont mind the hanging wires lol i dont know where that came from

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    • 35 replies
    • 6.1k views
  19. Started by spanky1975,

    Tomorrow is 21 days from my order date for the subs. I am trying to get everything ready as I am hoping the subs will ship soon. Thanks for the help The list: Vehicle : 1999 Chevy Tahoe (4 door) Location in the vehicle: Cargo area Space available (Length x Width x Height): 30" x 48" x 21 " Subwoofer make and model: SSA DCON 12 (x3) Subwoofer Size: 12" Number of Subwoofers: 3 Type of Port (Kerfed, Slot, Aero, etc.): slot What type of music do you like?: all kinds (rap,dubstep,country,rock) Is your goal SPL or Everyday Music?: everyday Tuning Freq (Hz): …

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    • 46 replies
    • 6.1k views
    • 1 follower
  20. Started by porkchop,

    I think I got my first box design down, hope to have you guys double check it all for me....... tunning will be at 35 hz. port area is 62 sqaure inches box volume is 4.29 ( havn't figured out what the 45's and braceing will displace) I just used 4 cubes for all my math. useing 3/4" mdf and will use double baffle. port opening will measure 15.5" W X 4" H , useing the bottom of the enclosure as the bottom of the port, ported to the side. port length will be 27.5" long the port will fire toward a vertical mdf wall on the drivers side. sub will fire up, and i will plan on having it inverted, for now. it will work out that the sub will be almost centered in the vehicle. kee…

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    • 74 replies
    • 6.1k views
  21. Started by j-roadtatts,

    I would Love to hear from a few people that have used Luxury liner pro. I have 4 sheets of LLP. I bought the LLP with the plans of installing on the front floors and under the front door panels. If I have any left I plan on the front of the rear wheel wells. The box will be forward firing with the trunck sealed off. I have already dampenered the inside of the car. My goals are to lower the highway road noise and just to lower the noise floor of the car. I realize every application is differant but would like to hear what results and experiences some people have had with the LLP. I have used the search function with no luck and also went to the SS forum but them guys a…

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    • 23 replies
    • 6.1k views
  22. Started by J-MONEY,

    Looking to build a 4th order bandpass For two 15" Orion xtr. I have a 5000 watt Planet audio anarchy amp to push them stock alt. Stock bat. 0 gage power and ground. Can any one help me with a cut out and measurements. I tried and failed miserabley.

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    • 7 replies
    • 6k views
  23. Started by jellyfish420,

    i'm redoing them. the tweet is gonna be in them this time and i'm molding them to the actual kick panel from the car.... one question though...should i seal of the backside of the tweeter hole? or just leave it like that?

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    • 67 replies
    • 6k views
  24. Started by BanginGMC,

    I seen on a build log this guy put 8" subs in his doors for mid bass. He didnt use a box or anything but a adapter so the sub can be mounted. - i am thinking about doing this to my s15 but i imagined that the sub will need the right enclosure to play good. So it leaves me with the question.. will an 8inch sub play good in a door without anything but an adapter for the sub to be mounted. I cannot ask him how it sounded because i dont remeber where the log was. -thanks Dom.

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    • 55 replies
    • 6k views
  25. Started by shizzzon,

    Ok, let's say you need a larger enclosure for SPL competition and you have ran out of port options... You need a larger enclosure... would polyfill help or would it actually drop pressure potential... My ports are starting to tune past my peak and i can't enlarge my port area too much more... Was wondering if i start dropping polyfill in the enclosure if it will not only start to lower the tuning back some but keep me gaining as well... Is it worth a try?

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    • 48 replies
    • 6k views

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