SPL & SQ / Fabrication

Alright, i was suggested to use the recommended xcon enclosure (7.65 tuned to 30) but sub up and port back apparently is better in the jeep grand cherokees. All i did was move the sub to the top, will this work? Will it load strangely with the port? Or should i just design a new box lol. like so

Well, here's the deal. I'm going to be building a box for 2 Fi Bl 18's. I figured up the box will be 11.27 cubes before displacement, which is about 10.81 cubes after sub displacement. I figured that I will have 158 sq. inches of port area total. The question I have is, since I want to tune the box to 34hz, how long do I make the port? The port will be 44.5" wide, and 3.55" tall (inside measurements).

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.

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…

Is there any dB meter software you can use with a regular computer microphone on windows vista? i know it wouldnt be as accurate as a TL but its better than nothing.

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…

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…

2 SA12s, ported to about 30-33hz, whatever you think is best. I would like two seperate optimal boxes to go in the back of a Dodge Charger, with 1200rms. Im looking for decent SQ (at least at low volumes) but mainly SPL

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

I'm preparing a box that will hopefully be home to 2 15" Xcons that will be powered by a saz-3500. My goal is not to get the best spl numbers. I do listen to a lot of rap yet at the same time I enjoy some Lenka, Utada Hikaru, or miss Swift to give some examples. I think I would like to tune around 30 or 31hz. So far, I was planning separate chambers and double baffle. This will be going in a smaller SUV, probably subs up, ports back. I am doing all my calculations and sketches w/ pencil and paper, so I may be off alittle due to rounding or way off due to poor math skills. Max available space is 26L*37W*24H, after divider and sub dis I am thinking the box is 10.3ft^3. I fe…

Well, a buddy of mine has one of these, it's a single cab, long bed. He just got a new, sweet ass small block 350 in it, sounds mean. But his audio, just makes me want to cry.. Stock 28 year OLD 5x7's in the rear, if what he told me is right, and it has no front speakers, doors or top of dash. Well, I told him I could fabricate him some 6.5's into his doors, there's plenty of space, and I was just wondering how would I do the wiring since it doesn't have any power options in the doors what so ever. So what I'm asking, do I drill a hole into the side of the door near the inside of truck and vise versa and find some rubber grommets or what? Thanks for helping!

First i would like to say thanks to everyone that is competing this year and promoting their organization of choice, and also would like to thank people who are going out of their way to promote the industry as well. I also wanna thank anyone coming back into the lanes to give em hell, to do what they know best, and that is GETTING LOUD! And with this, I would like to thank ALMA for joining our small group here. Hope you enjoy your stay and hope you can give out some good info to the newer crowd on what you have seen and where you might forecast where we are all heading. Anyone wanting to learn more about Team Gates or ALMA can either post here or visit her website a…

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…

Is there a good rule of thumb to follow when it comes to designing a custom ported enclosure in regards to volume vs tuning frequency? Like the more volume you have the lower you want it tuned? I have been playing with design specs in winisd and based on the graphs I see in the design window, want to build a 3ft^3 box tuned to 34hz for my 12" GCON . How well would this design translate into the real world? Box will be in trunk of my '96 accord. I listen to all types of music but LOVE dub step and deep bass. Would 32hz sound better. I am looking for max spl and bass response through a wide frequency range...

Why is it bad to have the height to width ratio larger than 1:8? I made a box that is too small.... and thats the only i really can make my box tund low enough... i fucked up and now im out 2 sheets of mdf and a lot of time and effort... damn..

As the title states I'm going to replace my whole setup I need help with choosing what to do the new setup will consist of 2 Ssa icon 12's a dc audio 2k and I do not know what size I should have the enclosure at for the subs and only thing that will make it a bit hard for me would be the tuning. I was think tuning to 30hz but that might be stupid to tune it that low for those subs. Thank you for all that help and I don't mind reading links to help me out

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.

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…

My substage is complete and now I am looking for some midbass/mid/tweeters. I have never used active crossovers but would like to for this build. Any suggestions for something that could keep up with (4) 18"s and 8kwrms. It is going in a suburban so I have all four doors available, plus the possibility of a custom center console. I was thinking about making center console enclosure for the midbass, but found out most mid bass speakers are designed for IB. Are there any that would work well in that style of enclosure? Would PA speakers(seen a lot of people using electro-voice) be a bad idea? Any suggestions or links to similar builds would be appreciated.

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?

guys i have an idea i want to do a new enclosure in the trunk of my 1995 caprice i was thinking of building 2 boxes one on the left side of the trunk facing inward and the other on the right side facing inward as well the boxes will be built to specs and ported for my db drive k915d4s powered by a bc3500d i also plan on cutting out the area behinfd the arm rest in the center of my back seat to act as a port into the cabin thid setup is for spl only but be used as a daily driver what do you guys tthink as fsr as the perfomance aspect of tis desighn there will be a total of 4 subs 2 on each side withe aproxamatley 10-15 inches between the boxes or less tips and feed back n…

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?

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

Ok i have always used areo ports and now i want to try a slot. I have used a few calculators and they tell me my length needs to be 23in long for the tune i want what length are they referring to? Overall length of the port ? Can some one please help lol I am looking to build a 5cube box for 4 sa 10s tuned to 35-36 htz I figured with the displacement of the subs and port i woul need a gross volume of 5.8cubes that would bring the net volume down to 5-5.1 right ? So far i have gotten the measurements from the calculator width-45in heigth-20in depth-14in. This box is going in a quad cab ram so i have space. Am i right with these measurements? and i am shooting for a mix of …