SPL & SQ / Fabrication

I built my box today it is around 1.75cuft and I went ahead and sealed it. I took a old circle port out of a old box I bought and it is adjustable! I was like holy crap.. anyways I believe it is a 4" port and it adjusts from I believe 4 inches in length to around 10-12 inches. What would the length of the tubing need to be for lets say.. 30-32hz?

I am planning a box design in which I am using two 3" aero ports. The ports are supposed to be 7 inches long. My question is when using aero ports does the actual tube have to be seven inches or does the entire port assembly (flares included) need to be 7 inches?

Im using 4 4" aero ports. The box I will be mounting them to is 38"x20"x20" with an 18" sub on one side facing up. The 4 wont fit in a line since their flare is 7"+, so my question is, should I do sub in the middle with the ports on the side of the box facing back 4 in a row, or can I make a square with sub up port up, Will having 2 ports closer to the sub than the other affect anything? or will air movement be equal between the 4?

So Lowes is having a sale in my area and i noticed that 3/4 MDF 4x8 sheets are on sale for 32$ I was wondering, how many 4x8 sheets would i need to make a 4.0cf ported box After displacements. Any help is appreciated. Oh and theyre having a sale on 1/0 for 1.93$ a ft

I have one, and I believe the knob is dead, the light does not come on and I cannot control the unit from it, I dont want to send it into PG and have to pay 100 just for them to look at it, any ideas? or Dave could you take a look at it?

Hi guys, I will be building the pre cut enclosures I calculated under RE enclosure calculator but there are a few things I would like to verify. I would like to tune the box between 33-35Hz @ 1.8-2.0 cubic ft. However, I just read that the RE calculator is not accurate. So I searched and found this website Enclosure Volume Calculator (EVC) and made the following calculations: Box Width 23 Inches Box Height 15 Inches Box Depth 15 Inches Material Thickness 0.75 Inches Number of Drivers 1 Total Total Port Volume 258.188 Inches3 -----> see calculations below: Port Width 13.5 Inches Port Height 1.5 Inches Port Depth 12.5 Inches Driver Volume …

my question is im trying to make a box for 2 18" btls dimentions are 49"L x 24"T x 27"D here are some rough sketches from paint how should i go about bracing it i know that i need to(or do i?) since im planing on running them on 2 SAZ-3000D and i will doublebaffle the top where the speakers will be mounted would simply corner bracing like in this pic be enuff and also placing a small block of mdf on 1 or both sides of the port to support the middle of the box

My friend just got his first non kicker sub and he got a fi bl 15 he is putting it in the back of his Chevy extended cab he can make it about 15-18 inches deep 17 inches high and can be up to around 50 inches long he wants his box about 5 cubic feet and 32 htz can anyone help with a design

hello im intrested in finding out where i can pick up ther softwear and hardwear to mesure sound on my laptop

hey all i just got metered at the florida spl/ db drag event in clear water and managed to hit a 133.6 on the TL with an fi x 12 and 350 watts. ooo and everyone should really experience mp3 pimps car first hand it is REDICULOUS!!!!!

Hello, im building a box for a loaded 12 btl. i have an odd shaped box i made to fit under my silverado back seat. my question is how should i run my port/s. the box is wedge shaped with 3.6 cubes gross. the box dimentions are 11.25 high in front 8.5h in back 53.5 long and 16 deep. any idea on port location? trying to get 14 sq/in of port per cube seems hard. thanks steve height1 11.25" height 2 8.5" length 53.5" depth 16" the sub will be facing up on the drivers side

I Recently Talked to Chad Kyupers Drivers Start Shipping a week from today. While talking to him i mentioned 6cuft@29Hz, he said he had a guy do 4.5 at 30Hz and its output was INSANE with only 800w. he said 6@29 with 1200w should wang hard so im down to 2 enclosure options, both with equal port area (77sqin) only one iwth 2 ports and one with one. originally i though there was going to be no way to get the ports on the same plain as the driver, so i designed a side firing enclosure and the port a straight shot. then i came up with the idea to get the port on the same plain... see image below http://i11.photobucket.com/albums/a167/CBFryman2/avatest.bmp the bottom thing…

My original box was the one recommended from ssa and it sounded good but the wife wants more space in the trunk so I have to do something different. So I need a box with less depth preferably ported still and a little longer tuned to 32hz. I don't understand how to use the box calculators I have found. Heres what I have to work with as far as area: 32"long x 16"high x minimum depth of the sub which i'm unsure of. The sub is 6" deep so I'm guessing a 1/2" more than that is minimum Basically I just need a longer less deep box that will still sound good. I listen to mainly rap/hiphop and some d&b. Any help would be greatly appreciated.

Just got done doing a system for my friend on a hifonics 1000 watt amp and a 15" l7 and the box he got is terrible it can't hit anything below 40 worth a damn. And he loves his lows. So I was wondering of anyone in NJ OR PA would like to get paid to build a box more suitable for the sub. Thank you

I wont to bild one of thes http://www.decware.com/whornok.htm for a set of 8's will the RL-i8 work in this tipe of box and what will the sield chamber be it ses to model a regular 4th order single reflex box to determine the rear (sealed) chamber but i dont have the program to do this i know the rli-8 is not out yet but i can wate for it

I am quickly becoming overwhelmed trying to plan a box for my BTL. I want to rebuild, as my current box is water damaged and pretty ugly at that; not to mention, it's tiny; 5cu @ 34 before displacement, and the port is small as well, 4" x 15.5" (it was free with my woofer) My max dimensions are 34"x26"x23", and i'm aiming for a pretty low tuning, thinking 28-30hz, I like a lot of slowed music, Decaf, etc. I have a local builder, but I haven't seen any of his work in some time, so I'd feel better walking in with a design in hand, and simply having him make the cuts and assemble it. It'll end up in an SUV, so I'm thinking sub up port back, same as my current box. Would…

My brother is getting an IDQv3 12" sub. Going to be powered by an arc audio 600w amp. Down the road he's going to get another sub and another amp to match. Our budget is drained so I'm going to attempt to build the box. I wanted to go ahead and build a dual 12" ported box tuned at 30Hz. and just use one side for now. Any recommended web sites and pointers would be greatly appreciated. Some questions I have are what's the best to hold the box together. Pre Drilled hole and screws, or staples, or glue, or all the above. Round port vs. rectangular. Which direction to aim the port. Should I aim subs toward the back glass tilted slightly up.

Hey all.Im going to be getting a different enclosure and im wondering how big it needs/should be.I have 4 10" DC lvl 3 subs with lvl 4 upgrades.Ive been doing some thinking and I think i can move my batteries and have room for a bigger enclosure.The max deminsions I could use would be 32W x 19H x 40D.My goal is to hit 150db and I just cant do that with my current enclosure.I know the deminsion I gave are probaly to big for the 4 10's so thats why I was wondering how big I should make it.I would like the entire enclosure to be double baffled and I would like to use aero ports.I have always liked aero ports but I have never had a enclosure with them.I would like the enclosu…

hey gang we are having our second annual spl clinic....this clinic is free and open to everyone.....we strive to help get new people started in spl and for us old dogs to learn something new...there is a flyer for the events coming up on our web sight at the link below http://www.trueaudioconcepts.com/specials.pdf if you would like to help out with this event we would love to have the help.....just contact me through the web sight...thanks

I want to try out a transmission line box or quarter wave, whatever its technically called, and want to know if im off to a good start... I want to use a 10" Fi BL Dual 1 so 41.5fs with an sd of 310cm^2 = 48in^2 1130/41.5/4*12 = 81.7 inches... so my design looks something like this... I dont know much about these kind of boxes it just sounds like a fun project, If it turns out horrible I only lose a few hours and a little off my wood stockpile...What do you guys think about this design and these measurements?

There are 2 drivers in each side wall that would acoustically, i assume, act as port length. So, if that's true, does leaving just the opening in the back act as length of the side walls which is ~25" long? also, i've never had the time to question these types of designs but does anyone have anything negative to say about drivers in the side wall like that? I've seen pretty much all different kinds of setups throughout the years and this particular one is not new either. I just don't understand what actually is going on when the front wave of these side wall drivers interacts with the port(2nd question).

Does port/woofer aiming really matter that much in an SUV? I'm looking at placing the box in the passenger rear corner with the woofer firing cross cabin and port forward.

For all you guys here in california, or wherever your are, come check out our comp. As of right now its a 2x weekend. With our comp on Saturday and another on Sunday in Woodland. Here is the info. Even if you do not want to compete come out anyways. Come chill... or compete its going to be alot of fun. Giveaways too!

ok my friend will build me a box in his wood shop but i need to get him plans. SI 15 MAG, ported. what do you think of the aeroports? is it worth it for only $25 extra? most people use 2 of them at $12 each. power will be a hifonics ZEUS 1000D 1000@1ohm it is a lexus 2002 es300. should be the same as the new camrey. people have put 2 15 in there before with a almsot bent box. i only need 1. the red strap is what i will be using to hold the sub in place, i would also love there to be ehough room to put my trunk battey next to the box. it is 6.5 inches wide demetions are THANKS FOR ALL THE HELP I AM FINALLY BUYING A SUB TO FINISH MY AUDIO SYSTEM AFTER 2 YEARS!!!!!

Ok I owed a freind of mine some money so he asked for a box and retarded me i said ya lol so here we go. It will be a bit different decieded for free i might as well do something different try something new. 1 cvr 10 1.8cubes tunned to 36hrz with an external port 28sqin.. design will be up in a bit and box will be bedlined