SPL & SQ / Fabrication

i got 2 15 fi q i got a subwoofer box with the front slanted.. will it make a difference in sound?? i got 2.3cubic feet per sub on the box.. on a 2005 nissan altima running a soundstream rubicon 2500 with kinetik hc600 and rockford fosgate 0 gauge amp kit.. the box is on its way and im worried about will the slant make a sound difference will it decrease the sound quality?? ill be facing the subs towards the trunk away from me. well its in the building process..i can send an email and tell the builder to make it square if it makes a difference..

I'm trying to figure out my next box. The program I'm using is tells me that my port will be 5Tx10Wx17.5D. Now how much of an effect will it have if I was to change the opening to 3.5Tx11.5Wx17.5D?? I'm looking to tune it to 34Hz. Thx from the help.

I dont have time to try to make some plans.... i need some people to bust out some plans for me... this is for a comp in like a week need it soon guys. I need someone to build me something around 4.5cubes, maybe 5cubes tuned around 41-45hz... Whats going in it is.... 1 12" XXX powered by 1 RE 35.1. Need these plans by at least saturday. Help a brother out guys. Comp in a week and i need a box for Street A... wanna go to town lol. Heres the pic

with making my box for four 15 subs sounds great but i have a slot port at bottom of the box and when the bass hits hard the middle inside of box flexs and makes a vibe sound. how should i brace this with out change the tune of the box?

First time building ported enclosure, I would have someone build it but I'd cost too much to ship and sounds like a fun project, sorry Argent hmm, scratch that the box volume is going to be 7.66cuft I used the port calculator at 12volt, port width: 30" port height: 2" port length: 13" tuning: 33hz I drew up this pic so that someone could tell me if "B" is part of the port length or what (p.s. picture is not in proportion to dimensions, just general.) So would A+B=13" or is A 13" and B is?

i have a box with 4.4 cubes after sub. it has 2 4"x12" ports can some one tell me what it is tuned to please

Never used allthread in a high pressure install so need some small tips in this area. I know that when allthread is ran from one side to another that washers and nuts are used on both sides of a wall. So that means 1 run of allthread will have 4 washers and 4 nuts on it. What kind of washers and nuts am i suppose to use inside of the box to prevent them from coming loose? I looked at nylon lock nuts but i cant use those on the inside because to get the nuts on the inside, you have to roll em on before you slide the allthread through the other wall. So, roll nut one way then back the other way to lock in place... nylon nuts appear to only roll in one direction so i dont k…

Well I need to know what size recones to order and box to start building.... will either be doing 2 12" zcons in a 6th order ported through rear deck or 2 15" zcons in ported firing into car with trunk sealed off. . Really wanting to be over 150 db's but not just wanting numbers. Wanting crazy daily driver. Did a 145.6 with one zcon 15 on 3000 watts so hoping I can brake 150 .......either 12s or 15s will have same amp. Thinking bc5500 or somewhere in the 5-6k range. Just wanting peoples opinion on which I should go with. Cause wanting to order asap so I can have them before summer

I have heard that mounting a 15" subwoofer (btl) in a car will be louder, or at least shake more, if it is facing up rather than back. does anyone have any experience or insight on this topic?

I finished my fiberglass box yesterday for 1 15" icon yesterday, kinda anyway. Its a little on the small side at 1.8 cubes. I plan on adding some polyfill to bring it up to ssa's specs for 2-2.5 cubes. I just dont know how much to add, I have a 20 oz bag of polyfill at the house. Any advice?

I am getting ready to make a box and need to know two things. I am building a box for a nightshade 12 and I got an aeroport. The box is going to be sub up port on the side 1) Can the port be inside like old times? The only reason I am asking is all I see nowadays with aeroports is crx style with ports out of box. Will I lose db's by putting port in instead of out? 2) If so how many cubes roughly would it take up? Port will be 15.5 inches long and its a 4 inch aeroport. I am trying to see what I need to make dimensions of box if port is in instead of out. I just want the best possible setup I can get for what equipment I have.

I am new here and need some help, so if you could help me, thanks in advance. I have a 96 Mitsubishi Eclipse (with a sun roof) and 2 12" audiobahn aw1200q subs. I have a lanzar 4000 watt amp for the subs and a stinger battery and batcap 800 as well as 0 gauge wiring all around. can you help me with a setup that will "pound" right now I am hitting a 141.xx thanks you!

Hi all, A friend of mine has a 15" xcon DVC1 in a 3.7 cu ft box (32 Hz tuning, flared port)Look at my avatar : it's his box !! He uses 2 Sundown saz 1000 d amps strapped to run the sub. Now, he wants another xcon 15 and 1 more saz 1000 (he just bought mine ). Here is the question : What would you do ? Build another same box for the second xcon, or build a new box for 2 xcons ? He is the box builder, so there is no problem to build boxes. What are the pros and cons of your choices ? Thanks for your help !!! (He has room in the car, no backseats, he knows he has to upgrade the electrical system for more than 4000 watts !)

I have a F250 Crew Cab and have 3 JL old 10w6s powered by a Diamond Audio D61000.1. They are in a 52" long box ported to 33hz. I want to get a 10" Fi BL and 1) wanted to know if this will hit harder that the JLs and 2) the box recommended for the BL is 1.5cubes, could I make a bigger box for the 10?

I have a 95 caddi deville, and i would like help in building a ported SQ sub box for two Dcon 12D4's. they will be powerd by a RF power T500-1 dbcp 2010 model. My bass gets trapped in the trunk,so i cut two 4" round holes in the rear deck to let sound inside the car. will the 4" holes change the tuning of a ported box? All help welcom. thanks

Does anyone know what the tuning is of the dual X15 box sundown recomends? And how many cubic ft it is?

Like title says guys i have these subs laying around i dont have dimensions as the car is my gfs and she would like to have some bass in there so instead of having them collect dust and her hatch looks small then might as well throw them in there so im looking for the box to be tuned to 32hz. Mainly listen to rap/hip hop and some light rock. Forgot what else to put in this been a while since i done this alright hope to hear from some knowledgeable people here

So, i want to build a custom box for a Range Rover classic, LWB Box is for two 12" Alpine Type R's. I want the subs facing towards the roof and the port facing the rear of the vehicle, the "classic" SUV style. Although, the truck comes with a stock cover over the very rear, i want the box to be underneath that, so when i park i can cover the stuff up and keep people from wondering around the car. What wood should be used? Also, any special tricks with making boxes? I will provide picks tomorrow if needed.

Hey, i currently have my box in about 1.6 cubes to low 30's, and Mike told me that 2cubes net at 34 would give me more output. I want to make sure i won't lose SQ, but i might give this a try. Will i gain much output with this change? Will i still have excellent SQ? I searched a ton on here and caraudio.com and read up on ports, square inches of port area, etc, and i used various calculators. I used the calc on maximacar.com, which is the best i have seen. The box dimensions are: 24x14.5x15 with a 4 inch by 11" port. The calculator takes into account woofer displacement and displacement of the port, and it comes out to 2.29gross, and 2.06 net. With the box being 1…

Hey guys I was wondering if I could get some help for a box design. I messed up my first design as my box fits inside my car but I FORGOT to measure the opening of my trunk to put the box in which doesn't allow it to slide right in. I am coming to you guys for a design for the Fi 15" BTL. And the car I have is a 95 Honda Accord. Max width I will go is 35" and the height will 16.5". Was looking for maybe 4 cubes of space @ 35Hz. I would really appreciate the help and thanks in advance! -Curt

Does anyone know where I can buy a copy of the USACI SQ disc with Hotel California? Or if someone can burn me a copy, I'd be willing to pay...of course.

I got JBL GTO 1514 single voice coil 4 ohms. 350WRMS, 15 inch. It came with manual and says Vbox 3.50 ft3 Fb 30.0Hz, so is this box tuned to 30hz ? Im thinking of making new box and i really need ideas how to improve my SPL. I want to try different box, something like this: At the moment i just have vented box with round pipe. but i want to make something like in the picture, so how can i calculate box size ?

This may come out the most newb question on earth. When running multiple woofers, do you need a amp that is ratted to power the RMS of each woofer or both woofers? In my case, for 2 btls, to run both off one amp do I need a 4,000RMS amp or a 2,000RMS amp? or should I just be looking at individual amps like strapping 2 sundown 1500s together? I've been looking at the sundowns and the rockford 2000 and 4000 amps.

Hi guys, I'm about to start on my first build. I've got a temp. sub that has been laying around for a while that I want to use until i get some money saved up to rebuild. It's a sonly Xplod 12 (I know) it'll be running off a rockford fosgate 300.1 in a trunk. I'd like to have the tuning somewhere around 28hz-32hz.. I'm not sure how the driver will like it so i'll let you guys tell me what ya'll think. It'll be going in a 2002 Buick Regal trunk. The demensions are: W=45", L=45", H=21.5". Those are the max demensions. If you guys need any more information just feel free to ask. The subwoofer model is: XS-L120P5W

What numbers are you hitting with windows up, vs down? I need some numbers for this thing I'm doing. Thanks!