SPL & SQ / Fabrication

Hey guys i'm building my first my box for three fi bl 12's and want to tune it to 31-33 and was wondering which would be better? Sealed,ported, or banpass?? Any suggestions would be helpful

okay so i just finished cutting and sanding all the pieces of MDF for the new box i'm building.. i used the re audio box calculator and it is gonna be tuned to 32hz. the only problem is that i am not entirely sure if the location of the sub will affect sound quality. just wanna play it safe and get some feedback. the specs are 30'' wide x 17.5'' deep x 14'' high. if the exact calculations are needed ill put em up. thanks

I just had a box built for my 2 icon 12's tuned at 30hz.I had it metered at my local shop.they said it was peaking at 40hz.is this normal?is it cabin gain etc.

this is going to be my layout for a new box ports gonna be up top they will be coming through the decklid and the subs are gonna be firing towards the trunklid.what do yall think of this setup?

I've been tryin to find a set that will owkr well together 2 way active.. I think I've come up with it. It will be run off a old sony mobile ES xm-5046 choices (madisound) mid - either SEAS ca18rnx or L18rnx(aluminum) both 7" tweet - SEAS 1" textile dome 27tffn I believe either of these would blend well and work together in a active 2 way.. What do you think?? or WOuld both mids work or would one choice be better?? Thanks, Joe. P

This is a WINisd plot of my final 3. It is comparing 3 ETHOS 12's against an EVIL 18 and a pair of ETHOS 15's. The ETHOS enclosures were taken directly from some of Quentin's suggestions, and the EVIL 18 was a shot in the dark based on my space limitations. How accurate is WINisd in calculating real world SPL? Based on the modeling an EVIL 18 equals three ETHOS 12's at peak tuning (hard to believe); the ETHOS 15's win all...The EVIL 18 is pitted against the three ETHOS 12's for SB2 class reasons, the pair of ETHOS 15's is for I don't give a damn what class I compete in reasons.

I built my box today it is around 1.75cuft and I went ahead and sealed it. I took a old circle port out of a old box I bought and it is adjustable! I was like holy crap.. anyways I believe it is a 4" port and it adjusts from I believe 4 inches in length to around 10-12 inches. What would the length of the tubing need to be for lets say.. 30-32hz?

im makeing this post for ppl trying to use fiberglass on there install's. this will help you understand how and what to use to make the job easyer. i will have more later and hopefully have a step by step so you can see it at work.... so here we go... the material's you might see is fiberglass this came's in many form's such as chop mat, cloth, fleece, speaker grill cloth and speaker carpet. next is the resin again came's in many form's, polyester and epoxy. these are the most used in the car audio world. other thing's you'll see is PVA, mold wax, MDF, bondo ect ect.... (and a few time's steel mesh, but i never used it.) ok now im goin to talk about resin. the resin we mo…

i have 2 18" treo ssx's my box now is 9.99cf gross with a 100sqin port port is 4x25x21.5 deep after all dissplacements im at 7.68cuft treo reconmends 8cubes after dissplacment im doing a 150.7db at 34hz burp with 1 rd audio d9 amp but can you help me with my new box i plan on keeping it 8 cubes net but what can i do with the port to get more spl but still play low notes and keep it a dailey driver here is a link to treo ssx page click on the view specifications at the bottom of this page for the specs treo web site im running the amp at .5 ohms and this is a hatchback car im doing subs up port back please help me out thanks

OK, so I've decided to try out a box using round ports for my 18" nightshade, so i can make the ports interchangeable for comps and daily. I'm using a Hifonics Brutus 1600d amp. i figure the box should be about 5 cubes since the amp isn't that powerful and i want to get a lot of output. i want to use 2 6" diameter pieces of PVC. i am going to do some testing to figure out where my port should be tuned at for spl, but my question is that if i want to keep the box at 5 cubes how big should i make it to make sure its still 5 cubes after the displacement of the ports? i have been looking all night trying to figure this out. i found that if my box is 5 cubes i should use 2 6" …

Just got done doing a system for my friend on a hifonics 1000 watt amp and a 15" l7 and the box he got is terrible it can't hit anything below 40 worth a damn. And he loves his lows. So I was wondering of anyone in NJ OR PA would like to get paid to build a box more suitable for the sub. Thank you

I have an 04 Avalanche that I want to build a box as a center console since it's the only place for a reasonably sized box. I have overall dimensions of 13"wide by 24" long and 16" high with 3/4MDF. I haven't worked with ported boxes so I'm a little unfamiliar designing them. My plan is to have the sub rear facing and at the top of the box, with a slot port on the bottom facing back. I will be driving the Fi BTL 12 with a Kicker KX800.2 which is tested at 1038w. I enjoy mostly rap\hiphop style music, but want good all around sound. So my questions are: How do the box and port dimensions look? Is there a different port style that would work better? Does the port placement…

Hey everyone, i have 2 T10001's powering 4 15" cvr's and im looking into a more reliable subwoofer that will belt out the lows a little bit better. I have narrowed it down to 2 18" Bl's with the cooling option(as i heard its neccesary) Question... i have 46L 27T and 19D to work with, however i must put a divider in because i will be running 2 amps, 1 per woofer(i dont want to blow one due to mechanical errors) So if i cut that in half i get 4.679 cubes with the port 22.25x2.75 per chamber. 35hz 4.679 without woofer displacement. Is this giong to be sufficient enough because i know it says 5-10 cubes for this woofer. Im really looking to keep the same output as my cvrs bu…

Hello , I am building a box with a round port. I'll try to flare the openings to have a nice flare port It will be a 6" port or an 8", I don't know yet ! How far from the box side can I have the port ? How much "room" does it need to play correctly, safely ? I know I can use an elbow, and I will if it's necessary. Thanks in advance for your advices.

I have pretty much been out of the game since 2009 because I was happy with my last build and left it alone for about 5 years. I recently bought a 94 F-150 ext cab to DD and I need my tunes back. This truck is going to give me some headaches but I'm slowly getting there. I'm looking to put a 10" SSD in a center console box, sub down with a forward firing aero port to try and get everything to fit and not look too silly. I made some templates today and figure I have 18" height, 24" length and 12" width overall to work with. That includes lifting the box 2-3in off the floor for sub clearance. I've never used an aero before but have been doing some research and I think I des…

Hey everyone I've been trying to mock up an enclosure for my truck in Sketch Up for 'bout a month now. I originally wanted to do 8 DC Sound Labs Level 3 12's. I really like DC audio and I have capabilities to get them at low costs. I wanted to do a 4th order but, I've been doing different designs and punching everything in to a 4th order calculator and using WinISD. I'm sorta stuck with ideas. Here's a rapid share of the usuable airspace and how the box would be shaped...a shell in a sense. mucho grasis, thank you, danke shon! http://rapidshare.com/files/184601903/blan...ge_perfect..skp I wanna stay using DC subs but I can change things around. I have a DD Z1 to pow…

how do you find out about competitions.? i've never heard of anything in my area like this. i live in cincinnati. which is a big place. but i guess car shows and sound comps are limited. or... i just don't know where to look

I have always wondered this and I'm hoping to get it answered. Is there a better way to aim subs? Most people I've seen have had their subs in the front of the trunk aiming to the back of the trunk. But people have also had the subs aim towards the back seats. And I've seen subs aimed to the sky. Is there any advantages to aiming subs to different places? What about the port. Most ports I have seen are right next to the woofer. What if the port was on the side of the box, what about the back? Top? Is this just the way people do it, or is there an advantage of having the port next to the woofer.... Any input is greatly appreciated

Im using 4 4" aero ports. The box I will be mounting them to is 38"x20"x20" with an 18" sub on one side facing up. The 4 wont fit in a line since their flare is 7"+, so my question is, should I do sub in the middle with the ports on the side of the box facing back 4 in a row, or can I make a square with sub up port up, Will having 2 ports closer to the sub than the other affect anything? or will air movement be equal between the 4?

Hello all, i have a question about a box design, i have always had beat in all my cars but i have never built a box before so this is going to be my first one, and i was wondering if this design would work or not, its going to go in a 96 blazer. thanks alot

ok i am pending the idea of having an amp rack instead of a backseat ( it depends on the qoute i get) and since the amp's would be in the open i was thinking about totally enclosing it and having the top back pexiglass so since i think to think totally through i was looking at ventliation for it since has been hot out latley ( i live in florida) and i am wondering what others with amp racks have used to. first i was thinking 12v fans but then i thought that i would need a exit hole for the air to move out. then i started looking at Liquid Cooling for computers since computers are 12v. and that is all i could think of.

Hey, im about to build a box for my buddy and i wanna get around 4 cuft. per sub after all displacements. Again they're two cvr 15's. I was thinkin somewhere around 14 inches of port area per sub per cubic foot of volume and im planning on tuning the box around 35-38 hz. so (14 x 4) + (14 x 4) = 112 inches of port area I've build a ported box for an Fi Q15 and i had it tuned to 33hz but it sounded like it was tuned very low once it was inside of the truck. And i have read that when the box is intstalled in a vehicle the tuning frequency of the box drops about 5-7hz because of the resonant frequency of the vehcile? So im trying to account for this with this box i'm b…

looking to free up some space in my nissan 350z so i'll be replace the box i built for my single sundown audio sa-10 with a stealth box. now before i do this i was wanting to know if this box will work great with my sub tune at 33-35hz instead of 39hz. The box i have now is a 1.095 cubic feet vented box tune at 35hz with the sub facing up and vent facing forward. h**p://www.ebay.com/itm/350Z-Ported-Vented-Sub-Box-Subwoofer-Enclosure-Plexiglass-Amp-Rack-39hz-/261676372251?hash=item3ced20911b&vxp=mtr

Here are the updated rules for MECA http://www.mecacaraudio.com/2009rulebook.pdf

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