SPL & SQ / Fabrication

I did some noob calculations and would appreciate someone varifying what I have done. I would like to do this build one shot. Here is what I have done so far. Skip this if it doesn't help. The box I have now, 40" L x 16" W x 16" H. Internal volume considering 3/4"MDF, I got 4.68cf - port dispacement (4.75 x 14.4 x 30) or 1.31cf = 3.37 - driver displacement of (.16 x 2) or .32 = 3.05 or 1.52cf/driver. I did two alternate box calculations of which I am interested in one. It is as follows: 40" W x 20" W x 16" H. Internal volume considering 3/4"MDF, I got 5.97cf - port displacement (4.75" x 14.4" x 17.28") or .68cf = 5.29cf - driver displacement (.32) = 4.97cf or 2.48cf/driv…

with making my box for four 15 subs sounds great but i have a slot port at bottom of the box and when the bass hits hard the middle inside of box flexs and makes a vibe sound. how should i brace this with out change the tune of the box?

Ok so my 10" JLW3v2 blew for no reason that i could tell the other day. I have it powered with the JL 250/1 monoblock I bought the sub used on ebay a while ago and never tested both voice coils so I think one of them may have been bad because no wires were loose when I opened up the box, but anyway, enough about that sub. Now I want a new sub and the Boston Acoustics G210-4 caught my eye. I like how it sounds tight and clean and it seems like it'll match my amp well w/ a max RMS of 300 from the sub. My problem is my current box is .71 cubic feet and on Boston's website and Crutchfield it says the sub wants .5 cubic ft (The calculation of the dimensions on their spec s…

I tried my hand at making an enclosure with miter joints instead of butt end joints like normal. This is going to make finishing the box 100% easier and take half as much filler (just having to fill the screws). I had always been turned off by the thought of miter joints because every one says they are so "complicated" and the thought that iff i mess up that pice is gone for good. Well now i realize that if you think about what is going on and tripple check its easier than designing a box with butt end joints, best part is if you fudge up a lil it isnt gonna be a big thing to corrct it. Case and point: My first set of 45's where slightly steeper than 45...i realized this…

Alright, so I messed up on my port. The port it skinnier and longer instead of wider and shorter. I have a BTL, and whenever it plays the lows, I feel like its not hitting them as hard as it should sometimes. I guess I don't know how its supposed to hit in the 30hz - 38 hz region. People say songs like Juice box will hit hard, and it barely hits hard for me it seems like... Same goes for some other low songs. Here is a pic of the port in the box: Here is the port that should be 33hz: Here is the port now (the 21" measurement comes from the 22", I had to cut an 1" off to get it to equal the port opening on the back of the box): Could someone tell me what this tuning wou…

I've spent a couple hours sketching up various designs on re calc and torres box calc. However, all I hear about any of the box design apps out there is that they are total crap. Working as much as I do these days I simply don't have time to become an expert in this area. Also understanding that install is a huge factor, I don't want to screw the design up. I am looking to build something this Saturday and want to get it done right so I don't have to change it again because of an improper design. I know there are a bunch of you out there that can do this stuff in your sleep. I don't mind paying for a solid design with cut sheet, etc. (i have PayPal) I also don't need anyt…

Hello , I need a new box design for a friend. It is for a Soundstream XXX sub in 18". Power : a Soundstream XXX 15000 amp !!! It is too much, but it's what my friend have bought !!! He'll have to turn the gain down for daily listening. He wants to compete in spl but needs to be able to listen to music. Can he have a way to change tuning / port easily ? The box will be like a wall, panels will be added to the sides of the box to make it look & act like a real wall ! Here are the max dimensions : 38.58" (Height) x 35.43" (Width) x 31.49" (Depth). If it is too big, we can have it smaller, just tell us. He wants 45's in all corners, and some kind of slot port. No tube …

Please, I know someone out there has a user manual for a 7949. Its all I want for x-mas. If you can just scan me the pages that refer to the units features and fubctions, setup and use. Thanks, Joe. P P.S. I've been searching everywhere forever now Thanks

Hey guy I need a good beating song with a long bass line ( about 3 min) box is tuned to 32hz and my car peaks around 40-44 on burps. I need a song that will last 3 mins. I have a comp in the morning and there is a kaos class ( average spl score over the 3 mins) I haven't had any time to try any on a tl any one have any sugestons?

Last time i made calculations I didnt account for a few things including the end correction of my slot port. I hope somebody with a lot of enclosure knowledge can help me out with this. Port Area 126 inches2 Port Tuning 32hz Port Internal Dimensions 9” x 14” x 39.85” Port Displacement (8.25” of the port will be external)(31.6” Internal Port) 9.75” x 15.5” x 14.25” =1.24625651 cubic feet 9.75” x 15.5” x 12.1” =1.058 cubic feet 1.24625651 + 1.058 = 2.30 cubic feet + 0.18 cubic feet (Subwoofer Displacement) = 2.48 cubic feet (Total Displacement) Subwoofer Dimensions Needed (9.23 cubic feet) 36 x 15 x 35.75 = 9.231 cubic feet before displacement 9.231 – 2.48 = 6.751 cu…

alrighhtttyy guys.... i got a different build that i need some help with because i realized the two SPL15s had a slim chance of working out =[. I'm putting a ascendant audio mayhem 18" in the trunk of a 01 chrysler sebring sedan. The sub is going to be front firing and im just going to keep the back seats down (when i put them up for people to sit in them i will just cut the subs off). The trunk is pretty flat and the box should be pretty easy to load in from the car with the seats folded down. I have L29 x W34 x H18 to work with. for you who dont know a mayhem is essentially a loaded BTL.

alrighhtttyy guys.... i got a tricky build that i need some help with. I'm putting two SPL-15s in the trunk of a 01 chrysler sebring sedan. The subs are going to front firing and im just going to keep the back seats down (when i put them up for people to sit in them i will just cut the subs off). The trunk is pretty flat and the box should be pretty easy to load in from the car with the seats folded down. I have L29 x W34 x H18 to work with, Im guessing both subs will be put in one chamber. Im open to either slot or tube ports, just need help coming up with a design. All of the parameters are here. I appreciate it alot and please help a fellow forumer out =]

ok heres the deal. i my box is sub and port same direction as of now i have them firing port up sub up. and there is around 4 inchs space before the trunk lid, and i am scoring a 148. i think i maybe able to squeeze the box in sub back port back.. but i will only have 2 or 3 inchs between the subs and port and wall of my trunk. if i change it up now.. and lose my score then im fucked for this weekend. i have talked with another town car SPL guy. and he stated, in all his testing center port back. he lost 3 DB. from having port on one side, and lost .5 db's on the dash (meca) with sub up port up i guess my short question is.. and at this point its just a g…

I just got a 12" Mag from Low-Hz, and currently have it in my old sealed box that housed a JL 12w6(v1). That box has about 0.8 cubic ft. after driver displacement. Anyway, I was planning on building a ported box and got this off the net: http://www.subwoofertools.com/forum/ported...=&Vas=&Fs=&CE=0 I was all set on building it, but decided to read more, and the more I read, the more I get confused and hesitant. So I decided to ask the official SI site for input. I want the best ported box with a maximum width of 30" and max height of 13". It's going into a 95 Ford Mustang, and I would like the box to fit perfectly into the hole when you fold down the seats. …

i have a 92 s10 blazer and i want to put a single 15" sundown d2 and i want to build a spl box but i will use this as a daily driver does anyone have blueprints or pics of any boxes for this setup?

I need help with a box design for a 15" Mach5Audio MAW sub. The recommended sealed box size for this sub is 62 litres (2.2 cu.ft.) 30hz tuning. I would like an enclosure designed exactly to these specs if possible. Thanks in advance!

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

Hello, I have a single BTL N2 12" D2, running on my saz 1500 at 1 Ohm. The box is 2.1 ft3 at 32 Hz, with a slot port. Port firing to the side of my truk. The car is a Toyota auris hatchback. On the TL I only scored 135.8 db sealed at the windshield, and I want higher numbers. It was at 58 Hz : I don't know why it was so high ! 138db with driver's side door open. What can I do ? I want a new box, but do I look for a bigger box, smaller box ? Do I need to have sub and port firing up ? I think I will try an higher tuning, like 34 Hz. Is it worth it ? I'm looking for suggestions. So I can ask a good box designer to work for me.

hey guys, i recently took out my sub and amp because i needed the sitting space. my video pretty much explains what im looking ot do. any help would be appreciated!!

Im designing a box for my new improved build and i jus want to verify that im doing it all correctly. The box will be for two 15 inch SSA EVIL series subs. But for right now i have two dc lvl 4 15's that will go into the box temporarily. So it will be designed mainly around the EVIL's. The car its going into is a 2007 Scion Tc. I measured out max dimensions and came up with a box that i think turned out very well. i wanted it tuned low, mid 30's and low 31's maybe. Heres what i came up with::: Pic from sketchup (Copied and pasted from MS word) Box Measurements Maximum limits for the SCION TC Width = 37 inch max (pushing) …

I wasn't going to do anything to my 2005 Chrysler 300c but that has changed. I have two ideas and need some suggestions. I'm replacing what is there now with a Fi BL15. Plan 1...sub firing forward into the cabin (cut out armrest hole and aim through there), port through the deck and seal off the trunk completely. Or plan 2...fire sub rearward port probably up (not through deck). In either case I don't want to go any deeper than the folding floor (approx 24"). I ran the numbers and can get 3.5 cu ft (after displacements) and tune to 33hz. I prefer sq but like it a little heavy occasionally. I listen to all kinds of of music but am thinking this setup will really sh…

I designed Shogen a box, I just want him to see what it should look like when he's done. And I SUCK at Sketch Up. Who's good?

i got test tones from 20 hrtz to 85 but i fail to find a sweep for free. any ideas?

Hi guys, A good friend of mine want to use his Fi btl n2 15" in a new ported box. He was using mine until I sold the box. This will be a temporary setup, as he is in the process of ordering a second btl, and the box for the 2 is ready (he had 2 Xcons 15" in, before). So, the box he wants to use has those dimensions: 83 cm x 37 cm x 50 cm 32.7" x 14.6" x 19.7" Those are internal dimensions. He has 2 4" flared ports that he wants to use. What length should he make them to achieve a 32 Hz tuning ? Thanks very much for your help. I use to "work" with RAM Design for L port boxes, but I want to try the forum members for these round ports.

After i told him my system he txted me two days later telling me he got a new system he said he got four dual 2 ohm 12s running off a 1400 watt rms amp and he says the box he has is 1.4 cubic feet per sub sealed but he said its tuned to 40 hertz. You cant tune a sealed box cam you? and anothr reason i dont believe him is he drives a pt cruiser and when i asked he said he still has his back seat in. Could u even fit an almost 6 cube box in that timy a** storage compartment? Thanks for all replies