SPL & SQ / Fabrication

What is box impediance rise and how is it calculated.

hey im workin on my third box build and i want this one to be perfict i need help on the port i wanted it tuned too like 33 htz and i dont know how to caculate that can anybody help me if i give you box demention and mdf thickness ???

Ok I am doing a box for 4 fi ssd 12's. It will be 8 cubes after displacement. I need help with the port tho. I am wanting to tune to like 35htz. I kinda want to try flared aeros but don't know what size or how many. Can someone help me out. Also need help with the length

I currently have 2 15 fi Q's and want to put them into a fiberglass enclosure. I will frame the back, bottom, and both sides out of MDF, but i am wanting the top and front of the enclosure to be fiberglass. What is the recommended thickness or number of layers of mat or cloth that i should apply for 2 Q 15's. Amp using the AQ 2200D amp if that helps. Thanks

I just recently bought a FI Q 12D1. I'm looking to have someone build me a box, but he recommended i get him some port specs. I wanna go 2.3Cu FT and tuned to 33 hz. Anyone know how to get the length/depth of the port? I'm completely new to ported boxes, any help is greatly appreciated.

I remember reading somewhere about the relationship between a box's port area and potential output. The reason i ask is i have been looking at the IXL drivers from Mach 5 and in order to tune low in such small boxes the port needs to be quite large in order to avoid port noise. I was looking at a 2cf box with a fairly large port (roughly 50 inches) my question is will such a large port casue a loss in output? i was looking at tuning at 30Hz for a daily setup that would hammer out the lows. Is there a general rule of thumb regarding port size compaired with box volume? Could someone point me in the right direction (i haved tried to search) I was hoping some of the experie…

i have a 89 chevy 1500 standard cab and am tryin to design a box that will fit behind the seat. Anybody on here have any expericence with these vehicles and enclosures like this?

i need a box built for a 06 supercrew f-150 any help with be greatly appreciated

So here goes... I have a 98' Mustang GT Convertible. I want bass in it. It Doesn't have to be anything outrageous.(though my Boyfriend said I should put 4 12's in it) I was wondering if yall had any ideas on what i could do? I Don't Really want it in the trunk though ,for one..trunk rattle really annoys me, and I like to see the woofer excursion. Second My trunk is sealed off from the cabin of my car.. My Boyfriend and someone else Mentioned to me That maybe a clam shell would work in the back of my car, If i took the backseat out. I'm not really sure if theirs any other possibilities that could go on..considering it is a convertible. If there is though, I am open for s…

If I were using the RE enclosure calculator, do I need to take into account the speakers displacement for the tuning? Should I tune about 1-2 hz below my desired tune hz? Any input would be greatly appreciated. Also does anyone know what a Kicker L7 would like the box tuned to? Thanks!

Was wondering if anyone on here could offer me a reaonable design for a btl 18 for free. I have a guy at the car audio forums that has always done mine for a small fee (they are reasonable). BTL 18 Tuned to ~30 hz. ~ 5-6 feet ^3 48 inches wide... and max of 24 inches high.

wtf makes it a "nice" or "right" enclosure? like everyone says that my 12" Q will sound amazing in the right box. how the hell do i find "the right" box without building multiple boxes? any suggestions? i just see it everywhere but i don't know where to start on building a good box to get alot out of the sub? i know the obvious, such as size. if iw as to go sealed, wouldn't pretty much any sealed box sound the same? if they were the same cuft that is. and i know theres alot of variables for ported boxes, but how do i know what sounds better then others? i just wonna do it right the first time. i'm currently in a 1.5 cuft sealed enclosure that a local audio shop "custom" b…

This is a goal to reach 150db tuned for a daily driver. I've been doin some measurements and have came up with a box design that has me smiling and this will be the last box i will build for the car... unless i downgrade later. This is my last attempt to try and reach 150db with a daily tuned setup and i'm crossin my fingers because this is only with 2 15s and 4,400w of power. Here is the wild design- Remove back seats, where back seat was, install a wall there sealed off from the hatch area. Now, i have 33" of depth from this wall to the back of the front seats. The box design would consist of 2 15s ported facing toward the wall. There is an 8" gap from the front baffle …

In the trunk of my car, there are two bars running across the top of my trunk, that attach to my trunk lid, i suppose its there to adjust tension for my trunk lid, will if i remove those i can get an extra 2" height and that will make a large difference for my enclosure and layout in general. Anyone remove these before?

I have an audiopulse axis 15 and a saz3000. I finally got my non-blown sub in the box and in the car. I was tunin it all and saw my hair movin it the window, so i got my gf to come over for a try at a hair trick. enjoy

I need some of you guys to make sure my calculations are good and that this box will work out. This is the first box I have designed to be as critical as needed. I am wanting to try a subs back and port into the cabin approach. This should work out to 6.75 Cu Ft after port displacement and after the 15 " BL's it should have 6.39 Cu Ft at about 32 hz. I am wanting to try to make it bigger and get maybe close to 4 cubes per sub. I have about 7 or 8 more inches to work with to make it a little bigger. But I figured I would make sure I am doing this correct before I go and design another one.

Hey I want to build a ported box for 2 12" SDC2.5s, but I've never built a ported box....and it confuses me On the Audioque site it says each sub should have 2.5 cuft and that includes the port and sub. But what should the port length, width etc be? I've searched and read up on a lot of stuff and other peoples' builds, but still am not sure what do.

Feb. 7th Glen Burnie, MD Thorshammer is now a 150 trunk! :bigclap:

Still doing my Thunderbird blowthrough build with the 2-12"BTLs but Im already looking ahead of what I can upgrade to. I know what I wanna do (no Im not telling). Soooooo I want some opinions on a enclosure I thought up. The question is really about the direction of the port. The box will be a half L and half T shape.....(removing rear seats) part of it would be in the trunk but most of the box is in the cabin. so the subs would be facing up with the port forward. reason why I want the subs up is so I can use some plexi. It'll be just above shoulder level. Leveled with the rear deck. This is what Ive drawn up. Do u think the port will be fine facing forward? note this is …

Alrighty, I think I have the new design down. Going to be 4 Se 12' in 8cu.'s after displacements. Powered by 2 SAZ-1500's strapped tuned to 35hz. After doing alot of reading,searching, and math I have come to this: 3 6" aero's ( around 92 sq.in. of port total) for a length of each port to be 18.94"(19.94 overall). Should I have more or less port? I have read and searched through quite a bit of the posts. Some of the math and that calculators I have used said I need around 138sq. in. of port. But I have read that when using aero's you may only approx. need 2/3's of that. So with that in mind what's your opinions. If this is wrong can you point out some more pla…

as the title says im very interested in this i came across it on youtube watching some vids read the comments a let me know how it is done please

any body have it its impossible to find

First off managed to pick up a 93 civic hatchback for 700 bucks and I would like to know what type of set up would be best, like port direction, sub direction, box style all opinions welcome as i'm pretty sure someone here would have done something like this already.

My shop teacher has a 1 inch thick piece of plexiglass, and he said if I can find way to cut it, I can have it. I have a tablesaw, circularsaw, router, and a jigsaw, but wasn't sure if any of them would cut it. Will they?

alright i went active last week and blew my tweeters withen about an hours play time.... maybe too much power.. maybe i had them crossed over wrong.... 100.4 sundown amp... 1st model and these ar4e my trweeters... http://www.madisound.com/catalog/product_i...roducts_id=1466 where should my settings be?