SPL & SQ / Fabrication

Just starting my build but I need to know about the box. Ive seen sub up port back sub forward port forward, sub up port up. I assume any combo will work but I want to verify. I want to do sub forward port up. IT would be the same as port forward but the port opening would be up instead of forward. So I guess it would sort of be like an L. Thats the best way I can explain. I need the port firing where the rear deck would be and the sub facing forward. The back of the back seat is being removed and replaced with the box. The sub will face forward in the middle, and on both sides the MDF will be foamed and clothed so two (though small) people can fit in the back seat! I don…

snoopdan uses pink panther insulation to seal around his box so it acts like a wall in his cherokee. I just got done building my box in my scion tc with 4 15s and i need to seal around it so it can act like a wall. I was gonna use pink panther but have 2nd thoughts because it states that it's purely a thermal barrier, not acoustic barrier. Is there any methods u guys use or can persuade me with facts as to continue to go with pink panther insulation or is there a better method?

Does anyone know anything about designing a bandpass box. I have a pair of 12 w6s in a ported box w 2 6 inch areo ports tuned to 44 hz and a jl 1000/1. I can do 143.4 db at a 48-50 hz tone. Im trying to get in the uper 140s without reaching the 2500-4000 watt amplifier range. Any help on design principals or general advise on how to get louder would be greatly appreciated.

its actally about 5.7 after bracing and displacement, is it too big?

Ok I am getting ready to build my wall and was wondering what size bandpass box and port would be required for 3 solox 12's running off of 3 crunch GP3000dpros? Its going in a smaller car so that is why I am using 12's. tuning would be for everyday listening.

Well, here we go, I've created this in an attempt to make a tool that can help take the guess work out of all the difficult to figure on a calculator values we constantly figure for box building. I think this is a decent tool and that it could work for alot of us. I'm putting it out here for all to try and give it some real world tests. Let me know if you guys find anything wrong with the sheet just let me know I'll do my best to fix it. So here ya go, we'll try this link out first just copy/paste: =http://www.mediafire.com/file/ugzuqj4mzjw/Box Calculator.xls=

any1 familar w/ my make/model please help. I already have tons of flex in the frame all around the sunroof but esp. the front part of it, I am about to be installing more then double the power + batts + 0 gauge so I am concerned. I def. cant even listen to the music up with the sunroof open, hell I can't even open up the sun shade on it when the system is on blast w/out fearing a glass shower, so I have no problem doing something extreme to fix this problem or at least help with it. If shizzzon reads this I am very interested what you did or are planning to do with your scions sunroof. Thanks in advance for any suggestios or thoughts on this. - anyone who has any advice…

when you build a box with a square or round port, isnt it nearly impossible to stay within the 12-16 sq in of port area per cube rule? if so what is the rule for those? and when making a external port it is still the same length as if it would be internal correct, only it is on the outside...

I want them to pound, but I don't want them to take up all my trunk space, I want the box to be tuned around 32hz, so does anyone have any suggestions?

Ok so im going to build a box for my new setup and im still not getting this port thing. Alright so the dimensions i want the box to be is. Height 20, Width 49, Length 50. And tuned to 32 hz.

Can I mount the subwoofer in the port, like this? And... Would a 12"Height 1"Wide 6"Deep port be the same as a 6"Height 2"Wide 6"Deep port? Would it sound any different?

I'm thinking about making a box for some older Rockford RFP1408's that I have, they are 200 watts RMS each, the only wood I have is a 30"x60" sheet of 1" MDF and another smaller sheet of 3/4" MDF. So, I'm gonna use the 1" sheet for most of the box, and the small 3/4" sheet for the front. 1.25 Cubic feet 1" x 11" port tuned to 33hz What do you think?

hey all just built my first 6th order and it came out beautifully. this was for an fi x 12 and pounds for what it is and what power im throwing to it. and illl be sure to have picks of it upp tomoro. also did my blowthrough and that was a succes as well. just wanted to say thanks for the help

if u have a regular internal port that needs to be say for example 20" long to get a 30hz fq.....would it still need the same 20" length if it was external to get the same 30Hz tuning? I know internal volume would be more considering less displacement

how does it measure the frequncy of the port if it does not know the displacement of the sub?

Is each quantity for a 17" Long tube? What if it needs to be longer? 4" Port Tube

Alrighty then. So im trying to decide whether to wall off my new system or having port back subs up. What do you guys think would be louder. The dimensions i am working with are. Length 53 , Width 49, Height 47. The system i plan on doing is two Fi BL 18s with two Sundown SAZ-1500d. Thanks, Kasey

My plan is to use 3 fans as a just in case precaution the way how i am making my new floor in my car to house my amps. I will be contacting a couple companies tomorrow but before that time comes, lets see if anyone knows this- Can pc case fans be used in my car? I ask this because of the following- All these case fans i'm looking at are rated as follows- Rated voltage= 12v Starting voltage= 6v (there is only 2 lines on the fan, +12v and -12v so 6v gots me lost... Anyways, i do not know the voltage tolerance of pc case fans... My voltage runs at 14.9v. PSUs typically are set to a max of 10% + or - on any voltage line before they shut down. This means a pc fan could never …

If you're building a downfire enclosure, how do you calculate the distance from the floor? I've searched and haven't found a definitive answer. All i've found is calculations for woofer sag and "just do 3"-4" from the floor." Half the radius, or plus 5% of Xmax... What? Help please! Thank you.

in a 2001 dodge ram ex cab fully deadened

I am currently in Iraq and cannot measure my doors. I drive a 2004 Ford Focus sedan. Does anyone have a Focus or know the mounting depth? I have some MLI-6.5s but they were incredibly inexpensive as I got them used from a friend and I would have no qualms with not using them. I really would like to know if I can fit the Peerless SLS 8" in my doors. I know 8"s fit diameter wise, or at least they look like it from here: http://www.cardomain.com/ride/9621. It would be awesome to have enough low end up front that I could put my RL-i 10 in a sealed box to save some space or even do away with a sub together.

some people know that I want to switch my blazer over to sq after I get a car for bass race/db drag so here is what I have so far let me know what you think mids amp (2ohms) http://www.woofersetc.com/p6743/PCX2125--P...t-Amplifier.htm tweeter amp (2ohms) http://www.woofersetc.com/p6743/PCX2125--P...t-Amplifier.htm sub amp (at 1.5ohms) http://ampguts.realmofexcursion.com/DD_Z1/ head unit ( I have just wanted to try it) http://www.woofersetc.com/p6576/CD7200-mkI...CD-receiver.htm mids for dash http://www.woofersetc.com/p1564/ES400--CDT...;-Midranges.htm mids for door http://www.woofersetc.com/p1566/ES600--CDT...;-Midranges.htm tweeters (a pillar mounted) http://www.wooferse…

my box is 9.0cf net with 120'' of port for everday what i need is a port for spl this is in my ford explorer 4door i am runing 2--15''subs on 1400//1600ea rms and how would i do this do i make a port that i can take out and put the spl port in are what//// what is the best way to do a sq//spl port setup any help would be nice thanks alot

would applying resin to the entire outside of the box stop the wood from absorbing paint? and would it be a good way to do it? Because i feel like the wood would absorb primer almost as much as it did the paint. I'm just wondering because the last box i built took several cans of paint, (and it was only for 1 10") and even then, the paint only came out ok

So, i am HOPING this is the final box design for my SPL-15 as I am going ot buy some MDF here in a couple hours. HOWEVER i just thought since this is my very first box design done by myself I would throw it up here for you'all to check out and let me know what you think. Nothing Fancy, just a simple ported box....