SPL & SQ / Fabrication

Has anyone tried this when they were bored or may just know what happens if you take a ported box and install 2 ports in the box, one tuned to let's say 30 hz and the other at 45 hz. I'm just curious as to what happens. Does the box react as if there is a major air leak? Do the port's tuning medium come into play and output a tuned frequency of 38hz for this example?

Most people who made them have stopped. Who makes the best ones nowadays?

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

Has anyone used eDead for sound dampening. I know that their subwoofers arent great, is this true with their dampening materials as well? I won't pay the outrageous price for Dynamat, I can't afford to spend $400+ to do my car. I can get eDead for .80 cents per square foot. Even if i had to double it up, it would still be considerably cheaper than Dynamat, Second Skin, etc. What do you guys think?

me and my friend made a ported box tuned to 28 hz ... we followed the volume according to the specifications of the subwoofers (2 12" pioneer premier ts-w3002d4) ... we made 2 separate 1.4 cu ft boxes ... the output is not what we thought it would be ... we want it to be louder and maintain sound quality ... what size cu ft box should we make to get more output? .... should we combine them into a single box? ... if so how do you do the portwork insde?

i have been working on not using the stupid ass re calc and doing everything on my own. how does this look. height 16 width 30 depth 20 with a 4 inch wide port 33.80839511415706 inches long tuned to 32 hz.

Well the classes are now set and instead of using 4 ohm ratings since there are too many Grey areas I am using rated maximum rms power at the amps lowest rated ohms. That way a 1 ohm 1000 watt amp is still in the same class as a 2 ohm 1000 watt amp. This will also make people see the difference between the swap meet power amp they bought compared to a real rated power amp in the same class and should bring those customers to the retail store instead for their next purchase especially if the retailer explains why his B.S rated amp just lost to the real power rated amp.The classes are more geared to the normal customer more than the bigger powerhouse systems but still allow…

Basically those bars connect the hinges from the left and right of trunk lid. They are bent in that way to accommodate the 6x9 speakers. I am going to remove the speakers this week. Could I replace them with some straight bar???

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 …

I was wondering if anyone has done builds on a 97-00 Honda crv and how much space I should leave between the box and hatch?

How do you guys carpet your boxes? I am going to be carpeting on saturday and was wondering what you guys think is the best/easiest way to do it.

I have 2 9515 DD's and I am building a new box. I need 75 square inches of port area. The square port I was going to use is 5 x 15 and is suppose to be 13.75 long. Do I measure the port from the front of the wood or the back? Also how far should my port be from the back of the box? I was thinking I might have to turn the port to get the length I need. The box inside measurement is 16" so the only would give me 2.25 inches from the back of the wood and 3.75 from the front.

I'm gonna be helping a friend build a box for 2 cvr 15's. It will be in the trunk of a 4 door saturn ported through the rear deck. I haven't played with cvr's much so im not too sure how to get the most out of them. Space is limited so i was thinking maybe 7 cubes with 112" of port tuned around 50. Starting it this weekend and could really use some help. Anybody have experience with these subs in different boxes?

I am noticing some mixed thoughts on enclosure bracing. My opinion on bracing is to brace areas larger than two square feet. Again that is my humble opinion, no scientific study. I have done a little bit of research and I have not been able to come up with an definitive answer. I had a Team SSA member tell me today that a mounting baffle for 8 12" subwoofers does not need bracing. That seems like a far stretch for me to believe. But then again, I am basing my enclosure bracing off a hunch. Can anybody name a scientific evaluation that has been performed on enclosure bracing and it's proper application? Or even a good article written by a reputable source on enclosure brac…

s10 blazer. i have 6.5 door space tweeter space in dash.if i added another set of comps in the kick panel would i wreck my sq. just wondering being that one tweet in dash one down in kick. how about comps in kick panel and use the door for just a 6.5 mid

I am trying to decide whether I want to go sealed or ported. My question is with tuning frequencies. Lets say that a subwoofers optimal tuning frequency is at 33hrtz and someone builty a box for 35hrtz, how would that effect the sound. And also what would the effect be if it was the opposite and designed a box at 27hrtz, how would that effect the sound. Sorry if this question has been asking a bunch before but I couldn't really find the answer I was looking for.

I just got done discussing with someone what i am doin with my wall in the car and have found a solution, a very cheap solution. I need to have my wall flared on the inside and outside to try and achieve higher pressure levels. My port area is 16.5" wide x 11.25" tall. Look at the bottom pic to see what a Bellmouth port looks like- for my application - There is a guy around town that can make me ANY custom size, flare, etc for my wall so i told him to hold off for a couple weeks while i test other things before i venture in flare port testing. I have some questions though so i can get him to make the proper size. The outside flare can stick out of the box a MAXIMUM of 5…

Hey I am just wanting to clarify that this box design meets the specs that I was told. This is for "1" 15" Fi BTL. It was designed to have 4 cuft. tuned to 35Hz. (Calculations done by BKOLFO4) The box with a slot port will need to be 17" tall in front, 14" tall in the rear, 31" wide, and 23" deep. The slot port will be 12.5" x 4". You will run it into the box until it is 4" from the back wall, and then turn and go 2" parallel to the back wall. (Designed by BKOLFO4) Like this (note the port dimensions are internal dimensions): Thanks in advance, Curt

Hey all.I REALLY want to build my own box but im worried that it would be to hard to do.I would like a simple dual 15" ported box for my type r 15's.I just don't know if its something I can tackle or not.So my question is in your guys eyes on a scale of 1-10 1 being easy as pie 10 being hard as can be,how tough is it to build a ported box?Also is there like a site or something that can help me with a design and other stuff like that?Thanks

Ok so since i have a trunk, and its a luxury car all of the bass is staying int he trunk. I cut a hole in the panel in the back and put a gril over it, and its loud enough in the cab, but i got and and listened to it yesterday and my treble is still killing my bass, i mean when you get out you can hear it but not like you should. I went back to the trunk and i could feel a nice breeze of air exscaping through the cracks. What to do, i was thinking of either cutting a bigger hole taking off the whole panel or taking out the back seat well trying to.

i'm getting ready to wall of my car @ the b-pillar, w/ a series tuned 6th order bandpass for my 2 15's i'm hoping to be in the 150's w/ this setup. here is the plan for my wall, and a pic of the old setup.....(except i'm running soundstream dbx 15's, not the RL-p's) what do you think???

So As I've been tired of looking at how my subwoofers look,(well the looks), then I've decided to make a custom ported box...only difference I'm going to fiberglass it so it's not going to be cubed anymore...so I'm trying to find out my volume so I can calculate all the port things...

PPL, I'm in the process of building an all out SPL car. (SM 3-4) Right now, I have 2 AutoTek MM4000.1's, which will be connected to 2 ATOMIC APX18D2's. (wired@ 1 ohm per sub) Being a Kinetik dealer here in Japan, I can get the 2400 Monsters at a good price.. I used the calculator on the site and it said I needed 3 of these monsters! My goal is to get full power out of the amps(burps only!) How many batteries would you suggest? and before anyone suggest other batteries, I've already looked at: Odyssey 2150 NSB90 via Northstar and Optima g31 Yellow tops all comments are but experence is wanted holla when ya can TIA Gavin (MERRY CHRISTMAS AND a early Happy NEW YEAR …

Ok, so I have a 3.3 total cuft box as a center console and i cannot reach over to the other side of the truck to roll down the window/unlock the door. (no power windows/locks sucks) I hear if you add poly fill to an enclosure, the enclosure behaves as if it is larger.. So I was thinking build a smaller box, but add polyfill to make it seem larger. So in the end, I will not have sacrifice output with a smaller box. If this is possible, about how much air space could polyfill potentially account for?