SPL & SQ / Fabrication

So, unfortunately i don't think i will be able to get the hight i need for 15s in a regular blow through. i have been looking in doing some sort of bandpass blow through with the chamber firing into the truck from the bed. i have read other posts and things but there seem to be too many different opinions and not facts. Any information for me would be greatly appreciated. I have seemed to be more focused of a 6th order. i like the way its ported inside a port but i do NOT have much knowledge on this so i'm looking forward to learning more about it. Would a bandpass be my best option, if so which one and why? i was looking to do something like this.

Hey guys, in this episode I show you how you can take a seemingly normal box, and make it truly custom and one of a kind, and integrate it into your install, and really give your builds a PROFESSIONAL look. Here is the video: The pictures below outline the steps: 1: Laying Out your shapes and ideas: 2: Preparing the shapes for body filler: 3: Applying Body Filler: 4: sanding Bosy Filler: 5: Prepping for Vinyl or Paint: 6: Wrapping the panel and triming: 7: Finished Product: 8: Finished Product: Please comment below or on the video itself, if you enjoyed the video check out my others as well on YouTube. Mark

I picked up a tdx 15 dual voice coil 2 ohm for $100 in a pre-fab box. 1200 watts rms. Hooked it up and found out the box is broke. It sounded like Donald Duck getting kicked in the nads. I would like to build an spl box for it but after googling my fingers off I can't seem to find any box spec recommendations. I was hoping to find a simple slot port build or something because I am still a noob and don't quite understand the Qs's and the other mysterious letter number references on the tech sheets Any ideas or opinions would be appreciated. I prefer spl over sq.

and lower tuning.. plus the subs heat up the enclosure, bad for the amps too, so better cooling! Port is 24" long now for a 22Hz tuning, I get bad cancellation I think, so I will do a 30" port which will reult in 20Hz

Im trying to make a box for a single 12" dcon can you guys give me your feedback and let me know what you think please? im new in building boxes this is my first and looking for it to be tuned at 32hz demensions for the box are as seen in the calculator( long story on why i chose those measurements and dont want to even explain why) let me know what you guys think please and also for my port according to this what would be the sizes of the 2 pieces of wood i would cut for it? thats only thing im confused about at this point.

My current front stage has visible speakers in the a-pillars and kick panels. Imaging is great, sound stage is deep/wide and often outside the vehicle. I have wondered what it would sound like if the speakers were hidden. Would the sound stage be wider, deeper and even more transparent because I would not be able to visibly localize the speakers? I stumbled across The McGurk Effect. Just to give you an idea of how visible my front stage is. Hmmm..... time to start re-making a-pillars for a hidden install? And carpet over kicks?

From what I have read here the port area per square foot rule is just a myth, port area has nothing to do with the size of the box. I tried searching more and all I could find was that port area is determined by the parameters of the sub, tuning, and amount of power. So I am curious what formula is used to actually calculate how much port area you need? I am currently designing a new enclosure for my 15" Fi SP4 which is run off an AQ3500. My old box was designed to fit in a trunk but now I have a Tahoe so size is not as big of a restriction for the new box. It was 3.83cuFt @32.25Hz (after displacement). I like the low end but actually would like to try tuning lower. I …

Okay, so ive been trying to decide what i want to do with my 600 dollar tax return. i get it in a week. =) not bad for only working two months eh? lol anyways... I have a 96 tacoma regular cab pickup with the bench seat in it. I have had a few systems in it. I have a brutus bxi2008d. My PLAN is to get an SA 12 and build a box as big as can behind my seat. (after many measurements and few boxes that ive already built i think i can get about 2.3 cube inside of a 3/4 box before any displacements) with that said onto my questions... i have been using the12volts calculator for port length.... with from i have heard the general rule of thumb is 12-16 inches of port area per c…

Got a 12" BTL in 2.8cuft enclosure at 30Hz. Upgraded from a BL, and well, it took about a week to get used to the BTL. I have 31" x 18" x 16" of enclosure space available, maximum. (largest I can fit in trunk opening) However there's some space around enclosure once in. Would like to upgrade to something else. 31 x 18 x 16 = 4.0cuft internal before displacement with 3/4 MDF Would like 12" Q's. Can it be done using external areo ports? Or what are my other options? I have a 2500D amplifier. Goals are to move more air than the 12" BTL, and I prefer lows.

Are 45*s needed with in boxes that use PVC tubing as ports?

Well my set up starts as this the 18 inch xcon will be going in my rear seat of my 1993 ford mustang gt i already have a cheap 15 inch sub in the hatch (its on its way to being replaced just figuring out with what) so back seat is where the xcon goes Now i have enough space for almost optimal ported box but it cuts visability down a fair bit and this is a daily driver. So my questions are how much sound loss would i loose roughly going with a sealed build as to a ported build ( not really going for sq tho most know xcons sound amazing anways). 2nd ? if i do go ported is there a huge diffrence between going say 6ft^3 affter displacement and bracing as apposed to say 7+ft…

In short order: I've layed out so many ideas for the cargo area of my truck that i've gone cross-eyed. The trailblazer's been a test platform since I got her last year. It's about GD time that I finalize something for her. Afterall, it's my daily driven - 400 mile a week vehicle. '02 Trailblazer LS; no third row seats; no ext version. I need to actually be able to utilize the U portion in SUV. So: a.) build an enclosure / rack along one side b.) make a wdith-wise enclosure that is easy to remove I've gotten to the point where I think it's easier to visualize designs in trunk cars simply because you have objects to work with / around. This stationwagon though, is kicking…

I searched the forum for any previous posts and information on this and came up empty handed so I apologize if this has been covered before. I finally talked to my buddy about the fiberglass stuff he was talking about that came ready to go, all you had to do was mold it around whatever it was you were using it on and let it cure. I found out that it actually cures in sunlight, or under UV light and has a wire mesh in it to help it hold it's shape. It's not horribly expensive either. I found 1 sq.ft. pieces for $24 at Jeg's of all places which I didn't think was too unreasonable considering it's got everything a person needs to make it work. I would imagine that by t…

I am Trying to come up with some designs for a couple amp racks, however I'm lacking creative touch I have seen a few nice ones on this site but just wanted to see if people would post some pics of theirs to give some ideas/show theirs off. I will probably be using mdf to make mine but I would like to see some of all different materials. Thanks.

So, in an effort to be cool I have been looking at getting a proper enclosure for my 12" Icon. Spoke with Andrew and I'm possibly going that route. First I'd like to find someone more local than across the US. I'm in Jersey and need someone close by if possible that can design/build an enclosure to spec for my boom boom. ... Anybody here on the east coast with the skills and tools?? Please let me know... Thanks!

Well, that meter is comin in handy... I've got spreadsheets on my computer right now of multiple setups of what they do from 30hz-52hz in 1hz increments off of a 100w amp. I chose low power so when i make a change i can see it's difference better with low power. So far i've tested 8 different positions(i don't list all of them due to bad output and tested others with failure as well in output potential) using 1 10" sub ported at 42hz(just because it's only box i have at the moment before it gets warmer) (This is daily driver only) I've tested all positions AT THE HEADREST ONLY. So, all the Db ratings below are noticeably low. I've been to comp before in the past but m…

basiclly the lower i tune my box, it seems the higher DB i get on the graph. @32 =138 @26 = 139.4 @20 = 141 That can't be correct can it?

Hey everyone. I purchased an SA-8 after reading a ton of reviews and now i am ready to start building a box. Since i've never built a box before i downloaded a couple of programs which apparently i have no concept on how to use :/ I listen to a variety of music from metal to dubsteb so i'm looking for a a box that can do both SQ and SPL. From what i've seen online it looks like .6^3 box tuned to 35hz is the way to go. Sub is going to have 500rms at 2ohm feeding it. I was thinking of having the sub point towards the roof and the port firing to the back. The narrowest point in the vehicle is 38". I emailed ram design to see if they could design me something but i haven't…

I am about to start a build log (finally) but I want to get some final suggestion(s) on my Front stage. It's going in a 1998 Honda Civic 2-door coupe. Big 3 in 1/0. 170 amp alt. XS Power D680 and D5100R (front)-1/0. 4 gauge to amps from D680 that is in the rear. Kenwood 942HD head unit, I use the cross-over controls on the head unit. Previous setup...Kenwoods 5 1/4 co-axials...Front....Pioneer 6X9's in rear. (in car when I brought it) 2 ch 2 ohm (200x2) on the Sundown 125.2 I didn't like it...sounded OK (on mainly Pop and Hip hop) , the rear was always louder than the front stage (which was irritating at times). It wasn't very balanced. I listen to all music Jazz…

alright so im building a box for 2 15" LI's. the box would be 33" in depth which gives me 3 inches from the hatch on my jimmy. i think i read on here somewhere that there should be a least 6 inches for it to load off whatever the ports facing. the subs would be on top and port on bottom.

How important are 45s inside an enclosure? Also how do you measure a 45 and braceing?

Would it be possible to make a transmission line box for 2 18 Q's in an area that's 16" tall x 39" wide x 70" long with an additional area of 22" tall x 52" wide x 10" deep OD? Like this: Would having the subs mounted off center make it not work?

I'm just about ready to buy a H-701. I have a pair of sundown sax-100.2's running dual mono to my Diamond d-971 components(~400 rms per side). I wonder if I should stay with the passive xover or go active... I have the capability to easily switch between the 2 when I get the processor. Also, I just got off the phone with Diamond, found out that the tweet is crossed at 850 hz, but he said that the woofer has no upper cutoff freq. If I do go active, Where should I set the freqs, I want to try and keep the tweet as low as possible to bring my stage up. Any help would be greatly appreciated.

I would like help with a design of a box for a Sundown Audio SA 12" sub woofer , that is 12" at the bottom, 8" at the top 17" tall and 30" long, with the sub woofer mounted on the slanted side. I would like it to be ported, and tuned to 32 HZ. Again, 3/4" MDF 12" bottom 8" top 17" tall 30" long Tuned to 32 HZ Sub-woofer mounted on slanted side Truck-box style.

So, it's getting near that time of the year.... I'm trying to figure just how I'm going to make it to finals this year... check out the sights, installs, and meet a few names. What better time then World Finals? So, dBDrag Finals are Oct 7-9 in Cleveland, OH. I'm definately going to be able to make it here, it's only a 3 hour drive for me. Meet shane, tottie, nick, loyd, tom, pete, iggy, and so on. Anyone else going? So, Usaci Finals are in Kansas City, MO Oct 15 & 16th. I'm going to try to make it down there, as I can get flights for ~$250 so far. Meet Matt, Mike, Justin, so on. Anyone else going? -Nick