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Alright, so I have designed my box. 1.72 sealed/3.0 ported. 8 inch aeroport tuned to 42hz. Sub is a single zv3 15, amp as of now is a sundown 1500 (I plan on upgrading to over 3k soon). I have drawn out some box sketches and played around in WinISD and Torres box calculator. Do the box numbers (cft, tuning, port size) sound right? I know theres a lot to play around with when it comes to box designs. I know some people will think "Just build it and see if it sounds good", but Im only 18, so I dont have all the money in the world, so if I spend this money on building the box and it doesnt turn out well, im just out that amount of money. I just want to hear some opinions on the box, good or bad. I've designed plenty of sealed/ported boxes, but just now getting into the 4th order scene. Appreciate the help

The purpose of this thread is to post your measured impedance plots (or values) for discussion. There are competitors that may not be inclined to share their data, but I still hope some experienced people will chime in. Its not called box rise, its called impedance rise, and there's a reason for it. Impedance rise is affected by the final impedance you're wired to, the characteristics of your enclosure, and perhaps some other factors. So it cannot be completely contributed to the enclosure alone. This is a really busy subforum so I was apprehensive to start this thread here, but since the primary constituents are subs and enclosures, this is where the discussion belongs. Hopefully we get enough traffic to get it stickied, since there's a lot to learn from even a single impedance plot.

Building a box for 4 sundown E8's to go in the trunk to sit flush against the rear seats and port out the rear seat opening (ski pass). The attached picture has a rough draft of the design it is a angled box with dimensions of 36"width x 14"tall x 16"top depth x 24"bottom depth. Volume of each sub camber (RED) is 1.344ft3 and port area (BLUE) is 1.5" wide with a area around 18.75 tuned to around 33-34 hz. Mainly just need to know what happens to that tuning once it reaches the center chamber (with the front of the subs) and out the ski pass.

I've spec'd out a box using WINISD and Torres for my DC Audio Level 4 12" D1, and I want to make sure I get a second opinion on it before pulling the trigger. I plan on doing a plexi-glass panel on the front of the box to show off the motor and basket, so I want to make sure the box is right the first time around. Here's the sub porn pics: The sub box is 2.5 ft^3 Net with a 6" aeroport at 22" long tuned to 34 HZ. Plan to use a big ass port with an elbow to accomplish that length of port in this box so that both sub and port fire upwards. Dimensions are 15"hX15"dX33"w with a double baffle on the top (15"x33"). My biggest concern is if this box is too big for this sub. This seems to be the only size I was able to get this sub to play out well in WINISD with 1500 watts being put to it at a 2ohm load. I gained over 3.5 db on the Transfer Function Magnitude chart at roughly 44hz, and managed to keep the Port Velocity below 31.88 m/s peak, peak being at roughly 32 HZ. I also managed to keep the peak excursion at 22.3mm at 25 HZ, so the sub should never bottom out on even the lowest notes. Does anyone see any improvements that can be made on this design? Or does anyone think this box is too big for this sub, who can manage to get proper port area for this sub with 1500 watts at 2 ohms to it without adding 1+ cubes to the box size in doing so? Thanks guys!

I have Made a strong double floor/double baffle box with window bracing out of 3/4 MDF just a bit larger than spec . I am using white sewer pipe so I can run the sweep 90's and dual 4" precision port flares top and bottom for a single 12 in a test box and keep changing my tuning, I have a cheapo db meter on the dash while running all my tests. Here's where I need you guys because I'm stumped. So why when I make the ports longer (tuned lower) would my 30 to 35hz range numbers drop? also why when I shorten the ports (tuned higher) would 56-62hz range numbers drop? I also cant figure out why I'm so peaky I have some notes like 40hz almost always falls on its face. Tuned at 31.5 and 32 it dies but tuned at 31 it doesn't? (I'm talking a whole 8db) I also usually have a drop at 42Hz,43hz,and 52hz. I'm just lost as to why the numbers are so jumpy between tests. Why its a steady climb with drops and then back to a steady climb then drops etc. I start at 30hz and go to 62hz during these tests. I honestly always thought the low range to a point would gain at lower tuning while sacrificing some higher notes and vice versa. Can someone tell me from experience in a test box with meter is this normal and how do you decide on a final tune? Is there an easy way to rid myself of the random peaks and drops? Every time I change the tune some numbers go up and some numbers go down but not consistently on either end as you would think. It seems random. I love the 30-40 range Thank you in advance for taking time to read and respond. This place is the best. If anyone can set me straight it will be here.

Here we go with another build. This one won't be as slow as the Chevy TB and I'm excited for that. This vehicle is my work car so I work on it profusely week after week. I am hoping to get this one done by end month so until then here are my plans. If what you see sounds familiar it probably is, but I won't tell... Thanks everyone prematurely for the comments and hope to have some good reviews from this build. Rockford Fosgate T2500bdcp Rockford Fosgate T-400/4 Audio Control Matrix Crescendo Symphony 5.25" Components Rockford Fosgate T1D410's Xs Power Kinetik Mechman OFC 1/0 Singer Alt Pioneer avic 4200NEX HU

Looking for some advice on the design of my enclosure. The sound that I'm after is, I would like it to play tight and low music is Rap and R&B. Where should the subs be placed, as it pertains to the rear hatch? what frequency should the Box be tuned to? would like to keep the enclosure below the window line? Vehicle 07 suburban z71 Subs 2 sq hds315 Amp crescendo bc2000 Box to 32 hz? Subs firing up port to the rear. Stock electrical system for now. Appreciate the input in advance.

I'm building a 6 cubic feet enclosure for Two DC XL15 m2.1’s what port size do yall recommend wanting to figure out the port length plus cubic inches of port opening

So I'm trying to design a box for my 2 zv3 12's, i have installed 2 bucket seats in the rear of my 02 chevy pickup, and things have changed a ton in that truck since i last posted here. I plan on doing 2 zv3's in a ported box in between the 2 seats, almost like a tall center console. i found a 3D model of a zv3 12 on a different fourm, but i cant get the person to respond with a link to a download. Im just trying to get an accurate look of the box, and also having a model of the sub would be cool

Ok so here is the deal..I have a Nissan 370z so room is well very scarce. Before my Nissan i was running a 15 inch FI BL. After i bought the Nissan i bought a 12 inch Fi Neo Q because i just thought there was no way in hell i would fit the 15 in that small hatch. Being used to the 15 i hated the Neo Q it just wasn't satisfying to me. So I sold that and bought a 12 inch Fi BL and it was definitely better, not quite what I was hoping for but it was better. Months later comes a bright sunny day and out of boredom i just go to measuring to see if there was any way possible to get that 15 in there and believe it or not i came up with a box that would fit. Flip side to that though it that is bare bones minimum and there in no free space to make the box any bigger. After port displacement and speaker displacement it was around 2.95 cubes. I threw the FI in there and let her rip and believe it or not it sounds pretty darn good. In this car the enclosure is directly behind my head so it's pretty loud. My Fi is getting old and i was looking to upgrade. It did well on my hifonics brutus 2400 but i recently upgraded to the soundqubed 2200 and it seems to be a bit much for the FI (this sub is like 5 years old and has been through hell). So i was looking at the hdc4 2000 watt sub as an replacement. Seems to be a perfect match for the 2200 amp but iv'e read that it's a stiff sub and i'm concerned that if the sub is as stiff as people have said then being in a smaller enclosure may be a problem. Have any of you tried one of these in such a small enclosure?

Hey guys, Building a box for 2 Treo RSX 10's for my wife's Jetta. Manufacturer's specs for 1 sub are 1.3ft^3 net volume with 12"^2 of port area at 14"long. Thus, I am thinking of building 2.6ft^3 net with 24"^2 port area 14" long. Anyone have any experience with these subs/their tuning and can tell me if other specs might sound better or if I am on the right track? Any direction will be much appreciated. Thanks!!!

I'm trying to figure out how many cubes and what to tune each side of a 6th order bandpass for a single sundown zv4 15 and how many sqin's the ports should be. It's a d2 rev2 and will be ran on a shark 3500.1 amp. Its going in the extended cab of my 2004 f150. I want it musical and loud lol. Any help would be greatly appreciated!! I new to building bandpass boxes and I could really use the help. Thanks!!

Hey guys, im new to the site..been in the car audio scene for years though. I have a custom built t3 t2000 12" sub. Has the hp500 black coil. Sundown soft parts with megaroll surround. I have been hearing good things about aeroport boxes..but can't find any specs online. Anyone have a input?

I've seen quite a few write-ups on 4th order ratios and what not, but am struggling to find anything on 6th orders. what would a 1:1 compared to a 2:1, 3:1, etc. ratio 6th order sound like? Thanks!

Hi guys, not sure if anyone can help. I have past enclosure building experience just unsure on a few things. Most of the boxes I have been are for 12's which in theory is the same but smaller right? I've decided I'm going with a 2x sa-15 rev3 setup. Which will be ran on 1500watts (sae-1500d). Im unsure on a volume but im guessing around 7-7.5 ft^3 on the power I will be giving them? Most of my boxes have been tuned to 33hz, But ideally I want to drop my usual to around 30hz. In regards to port. Aero or slot? Any benefits over one and other? I've always used slot's as their easier to work out area etc. I do like the inside flared aero ports though. If there isn't really a gain in my sort of setup ideally a middle slot port would be fine. In regards to the space I have, W40" x H35" x D50" (I have got more room than that but those are my preferred boundaries. Box will be built out of birch ply. Corners will be 45 degreed. Port flared. Corners flared etc. Also will be using threaded rod as brace's. (Which ways best to brace a box, Was thinking width ways? All helps appreciated.

Hello, Im looking to get a box design for 2 NVX VCW 12s from specs it says they like lower tuning and around 1.5 to 1.85 cubes per sub. with that in mind id like to tune to 30/32hz also i have good electrical that never dips below 13.5, i will get at least rated 2k if not more my max room is 15.5" tall,34"wide,23" deep thanks!

I recently picked up a Orion hcca 15, it a d4 and it's going between the seats of my Dodge ram 1500 reg cab and I'm needing help with a box. I'm running it on a shark 3500.1 at 2ohms. I have big 3 and 2 optima batteries. The space I'm working with is 17.5w x 38L x 15H. I'm not sure if it will be better sealed or ported in such a small space. I had a sundown zv3 in 3.5 tuned to 31hz using a 6" port in the same spot and it slammed. Any help would be greatly appreciated, thanks.

I recently picked up a Orion hcca 15, it a d4 and it's going between the seats of my Dodge ram 1500 reg cab and I'm needing help with a box. I'm running it on a shark 3500.1 at 2ohms. I have big 3 and 2 optima batteries. The space I'm working with is 17.5w x 38L x 15H. I'm not sure if it will be better sealed or ported in such a small space. I had a sundown zv3 in 3.5 tuned to 31hz using a 6" port in the same spot and it slammed. Any help would be greatly appreciated, thanks.

So just to state this is not a VS thread. I just want to know what the advantages or disadvantages of say running 2 12s that are 1k rms ea over say a single 12 at 2k rms or even a single 15 at 2k rms

Hello, I want to run 2 PSI platform 1 12s on 2k, my voltage does not dip below 12.8 so i will be getting right around rated. I have a screenshot to show the upgrades, Biggest box i can fit is 34"wide 15" tall and 23" in length I would like for the box to be tuned so i can play slowed bass songs about as low as 26hz if the small space i have will allow it I would like a slot port design with the subs and port on the same side (center port) Thanks for looking and hopefully you can help me out! -Mike-

So Its upgrade time and I plan on running 2 ascendant audio chaos 12s out of a trunk with the trunk being sealed, i would like to have the subs firing the same side as the port into the cab with the port centered between subs. Im looking for something with 4 cubes not including the displacements. tuned to 32 hz with 64" of port area and a 1.5" baffle i plan on using 1/2" allthread for bracing so it wont be an issue in taking up air space. Ive come up with a few designs but they dont work out, i need the box to be 34" wide with the height being 15" the depth cannot be greater than 26" thanks for the help!!! Also will be running on rated power

I need a box for my sundown zv4 15 rev1. Ive got it on a hifonics 1800.1 at 1 ohm. It slams right now in its current box but It sounds like the box is tuned to 35 or 36 hz. I want to build a 30hz or a low slamming box. Im new to building boxes but I work for a cabinet company so am pretty good with wood work and measurements and I have the tools so I thought I would give it a shot. What would be a good low hitting box tuned to 28-30hz for the zv4 15. I also want to know what program is good for tuning and sizing your boxes. I drive a mercury grand marquis so space isn't really an issue. Could someone design me a box for this thing that would slam 28-30hz? Any other ideas?

just got 2x v1 re sex 12s thinking about doing a 4th order box or regular slotted box im going to power them on a aq2200.(i know there rated 600rms) thinking box tuning 32 ish hz since there fs is 25hz going in back of a 4 door pickup so max 30 deep 48 across 40 high any input on is great thanks theses are subs spec https://www.sonicelectronix.com/item_27312_RE-Audio-SEX12D4.html Subwoofer Series SEX (RE Audio) Subwoofer Size 12" RMS Power Handling 600 watts Voice Coil(s) Dual Impedance (Per Voice Coil) 4 ohms Voice Coil Diameter 3" Sensitivity 86.1 dB Xmax (millimeters) 18 mm Subwoofer Design Round / Circle Main Cone Color Black Woofer Composition Dual Composite 2-Piece Cone Woofer Surround Rubatek Foam Magnet Structure Triple Stacked Subwoofer Grille No Re-Cone Kit Available No Recommended Enclosure Specifications Recommended Enclosure Type Ported / Vented Sealed Minimum Sealed Box Volume 0.75 cubic feet Maximum Sealed Box Volume 1.0 cubic feet Minimum Ported Box Volume 1.5 cubic feet Maximum Ported Box Volume 2.0 cubic feet Top-Mount Depth 7" Cutout Diameter 11-1/4" Shallow Mount Installation No Electromechanical Parameters Free-Air Resonance (Fs) 25.1 Hz Equivalent Compliance (Vas) 72.9 liters Total Speaker Q Value (Qts) 0.44 Electrical Q Value (Qes) 0.49 Electrical Resistance of Voice Coil (Re) 2.8 ohms Mechanical Q Value (Qms) 4.5 Efficiency Bandwidth Product (EBP) 51.22

I am working on a new design for a build and I am in need of some math assistance. I have attached a picture of my design with measurements, I need to find out how much space is inside the box, it will be built with 3/4" MDF. Any help is appreciated, thanks.

Looking to build ported enclosure for 2 skar audio ddx 15 dual 4 ohm on an rp 1500.1. Looking for subs up port back. Available space is H=22 W=44.5 D=22 trying to get between 34-36 Htz. Any design help would be greatly appreciated ive been trying to figure out something and my brain is just not working lol