SPL & SQ / Fabrication

I've always designed the box with the port on the side, but now I need it in the middle (using 2 subs). I do know that when the port splits off the port width gets halved, but is the whole length of the port mean that each side is the port length? Let's say I have a box that is 6" wide and 30" long. When it splits off each side will have a width of 3", but does each side equal 30" long? Someone also told me that you add half of the width of the port to each side of the port length. So each length would actually be 33" long. I don't know why that would work though. When I design boxes I use torres and there's a box that says "# of common port walls". I put 2 in there, …

never designed a ported box before so feel free to give any critisism/help for an xcon 10" net box volume 1.37 cubes port length 31.05" diameter: 1.75" if anyone is so inclined feel free to double check calculations and such as ive never done this before and might have done something wrong all info should be in pics bellow

I have 1 PSI P1 15" sub in a 4.5 cubic foot ported enclosure. I have a 6" diameter aero port that is 10.5" long. My box is a 6 sided wedge design and we are trying to figure out where to place the port. I have a 2010 Hyundai Accent Hatchback and my box is in the very back. Here are my 2 options. Option 1: Port on top of box next to the sub. Option 2: Port in front of the box on the angle. If the port is placed in front it will be a few inches from the back of the seat with the seat up. If it's placed on top it will always be in open space. I would rather it in the front so i can blow more air towards the passengers but i dont want the seat to interfere with the sound qual…

does anyone know if a single sundown audio sa-10 would sound good in a box tune at 45hz ?

Subs:2, Sundown Audio E-12 v1, 400rms Amp: Hifonics 1700.1 wired to 1 ohm (so 850rms per sub) Box. Custom mustang vert box, .9 cubes per sub sealed. Right now the E-12s are reversed mounted to get the most usable airspace. Is there a subwoofer that would better handle the power such as the soundqubed HDS 200 or 300. Also, should I stuff the box with polyfill or something? I can't turn my volume up to even half on some songs before the subs start to distort or bottom out. So what can I do to improve my setup?

Someoneon here linked a tool that cuts PERFECT circles. It was an attacent for a drill. Had a shield to block the saw dust and everything. Can someone link it or find it? I'm on mobile and can't use the site so well

I picked up a 1000watt amp and I'm getting two SA-8s, question is about the port size/length and whether or not to open the air space to both of them. Currently one side has about 1.4ft^3 and the other has .8ft^3. So if I open up the divider the overall airspace should be around 2.2ft^3. The recommended airspace is .75ft^3 per sub. I was thinking if they are separated I could tune one a little higher than the other and get a wider range out of them, or would they sound better in a shared airspace? Whichever is better I need advice on the port. I input these numbers on Port Length Calculator and came up with a 12" long port if I combine airspaces and use a a 4 inc…

I was thrown into the fire so to speak at work, designing and building a box for 2 phenox gold 12" subs and i found out our company policy today is to resin the entire inner box and glass the corners. I do not believe i have enough resin to coat the entire box so my question is this: does covering the box with resin or any section of the box improve its performance? should the corners be glassed and if so what is the best way to do this? i was shown a corner piece with resin and kitty hair pressed into it, it was not smoothed. i need to finish the box tomorrow.

Hey guys im switching from CVXs to BLs im wondering if my old box would be ok with the new subs till I get a new one built. Car Tunes built the box and its suppose to be "spec" for the size of my truck and the space im utilizing. They said its a 1 chamber for 2 subs. I went outside and measured it...dual 15s btw 20.5in long 42in wide 18.5in high The port measured 2.5 in wide 16.5 long I just wanna know if this box is close to whats recommended. Im sure they need more port volume but I don't build boxes so someone enlighten me please lol. Any input is greatly appreciated guys! Thanks

Okay, so there are two ways I can go about this. In the back of a Grand Cherokee I want either 2 15s or 4 12s. I was looking at buying 2 Dual 12 aeroport boxes from Davetheboxguy. Just hooking up 4 Soundqubed HDS200s and calling it a day. OR I could design and create my own box for 2 15s (I was thinking SSA ICON or the HDS300s or perhaps the HDC 3.0) The amplifier will possibly be a BC2000d good for 2250 rms. I could step it up if need be if somebody could recommend an amp that doesn't cost much more but will give enough power. Should I go with 4 12s, or 2 15s. (Yes I know its preference but I am good with either one so help me out here) and I am going to start workin…

I have noticed that my subs (2 12 inch pioneer champs) are peaking high. I think my tune may be messed up but I just cant get it right. It will get real low and then attempt to hit a few high notes. The amp itself should be tuned with lpf at around 35 and ssf at around 20. Any suggestions?

Couple of questions for those that have done blow-throughs. This is the back seat in my Mitsubishi crew cab. If I were to mount my amp on the back of the seat (where the sub box is in the pic), would that restrict the air flow in to the cab when the seat is up? Also, in regards to the tuning theory of building the sealed section, measuring peak and tuning the ported section accordingly - does that work with a blow through? I would have thought if the cut out is smaller than the overall cone area, then it would act as a really high tuned port?

Looking ~15^3 after displacement with 18.5 x 9 slot port on driverside tuned ~34hz since it will be at B pillar. Had talks about tuning it higher since it will b pillar (midgate) and will go lower anyway in Hz's. Also to do center ports with separate chambers instead. Will be running a Memphis Mojo 4kw and have upgraded my electrical. Looking more at a daily setup and a shared chamber with slot or separate chambers.

When using a PR in place of a port, you would keep the same internal box volume as the equivalent ported enclosure, correct?

Im needing help i only have a phone no computer and I'm wanting a box built for my new soundquebd hds3 12's i got two subs and my dimensions are 30" deep 35"widr and 18"tall wanting it tuned low around 31-30hz I'm also wanting subs on top facing the roof and port facing the back hatch I'm using a 1200.1 super d class mono Zeus amp with big 3 upgrade and 0 gauge wires but I'm unable to access these sketch up things and box calculators so can someone please help a fellow bass head out and please send me a blueprint of this and a cut list of sides and port and everything pretty please b greatly appreciated

I've been reading the Loudspeaker Design Cookbook and found the effects of lobing due to driver placement on the baffle, but am still left wondering two things. Use the picture below as a reference to how the placement would differ. Assume same port length and volume for each. #1: The port ends in a different location inside the box, does this have different loading effects on the sub? From appearance, it would seem that the air flow in each would be somewhat different and affect the subwoofer? #2: What happens to the subwoofer and response as you move it closer or farther away from the port? Is it best to have it centered or off to a particular side?

I was wondering if anyone could help on a the best way to approach walling my truck off I have 2 18" zcons facing forward and the port forward and I want to wall it off I was thinking getting cardboard and getting the outline of the rest of the space that I need sealed off and putting it on some mdf and cutting it out but I can't think of how I would attach that piece to my box without wood gluing it so if anyone could help ibwould appreciate it

Ive never built a box that wasn't square all around so this is new to me. I have an angled back plate, so if I angle the port a long with it, the bottom of the port is shorter in length than the top. Which should make the tuning on one side of the port different then the other or how does that work? How do I create a center port like this and have the tuning and airspace I require? These are interior dimensions. I'm sure I'm over thinking this, but I want to stay as close to 13 cubes and 30hz as possible.

Im not paying $400+ for a local guy to build me a custom box for my silverado. Looking for a ported box under the rear seat. Not sure if I have the airspace for 2 10's or just a single 12.

Vehicle : 2003 VW Passat Location in the vehicle: Trunk Space available (Length x Width x Height): w1- 39, w2-42, h1-15.5, h2-19.5, d-25 Subwoofer make and model: Custom, similiar to the Sundown X but more motor force, excursion and lower fs Subwoofer Size:12 Number of Subwoofers:2 Type of Port (Kerfed, Slot, Aero, etc.): Up for suggestions but thinking about aero to save space What type of music do you like?: Chopped and screwed, decafs low stuff (about 18-35hz) Is your goal SPL or Everyday Music?: Everyday Tuning Freq (Hz): To be determined - probably around 26 Volume : 5-7 cubes depending on tuning, port and bracing. Questions: I want to first start out saying I blew m…

I have been messing around with SketchUp to design a box for my 15 Xcon, I have only built a few boxes all of which I used the re box calculator so this is new for me. I'm looking for any suggestions or recommended changes to what i have so far, as far as port area and tuning frequency. This is based off an estimated max size 34"w 17" h 18" d. (I'm going to make a test cardboard box to see the largest size that can fit through the opening)

So was wondering if this box design was good for spl( stole the pic from smd froum ) http://i1352.photobucket.com/albums/q641/antoinez28/1571462d541ddd32176d702a8041523f_zps241afbf8.jpg The only thing I will be using 3/4 mdf and the top of the box will be 2 inch thick plus bracing.

Just got this bad boy in today, from Fatbox USA...I must say it is the best box I've ever seen built and was done by the head owner of Fatbox himself and is signed by him for me! Not only is it VERY well built, and stunningly BEAUTIFUL, It is a BEAST at 100lbs!!! ALL 1" industrial MDF made in USA with a 2" front panel!!

I found measurements for an enclosure for my 2 12 inch pioneer champ pros tsw3002d4. The box is tuned to 33 hz. I was just curious as to whether that would be good for my subs or too low? The amp I am using is a hifionics zeus 3000 watt zrx3000.1d. This will be my first box build so I want to be as clear as possible. I used RE audio calculator if that is any good.

I am new to this and replacing my RE SXX 15 worried after a year it sounded cool, but the thing on E40 etc. to long might have to be turned down got a little smell. I have looked at Xcon wanting something lower and only way I could fit an 18" would be in a sealed box, upgrading to try and get more low end, handle Hifonics Brutus 2400 better, and hit all day. It will be one speaker guess everyone seems to call Xcon SQ sub more than Zcon, 15 would bolt in box net slightly over 3.55 aero port 6" might upsize box and run 4-5 4" tune it lower even in current setup probably tune it lower then RE was. I looked at the Zcon 15 because of the better coil and actually sensitivit…