SPL & SQ / Fabrication

box dimensions 38 * 13 * 15.98= 7894.12 in³ = 4.56835 ft³ tuned to 32hz Bracing with 1 in dowel rod up/down r=.5 h=15.95 3.142 * .25 * 15.94 = 12.5 in³ = 0.007233 ft³ front/back r=.5 h 12.97 3.142 * .25* 12.97 = 10.188 in³ = 0.005895 ft³ probably two of these.. perpendicular or parallel so this leaves either 4.553884 for parallel or 4.555222 for perpendicular, up/down and front/back plus sub displacement of .19 4.363884 parallel.......... and for port area, with 57.25 in² slotted, ~50% for aero is 28.625 in² so a 6in aero port will be about 13.62 in long with the flare, with 28.26 in² without. round is also about 55% more efficient than slot so.. i think all my math …

Ok, so now I'm hooked. I have the 2 12" zcon's in and the 2500d. Now I want more. Have an eye on a ns-1. What will I need to do for a competition box? Keep in mind that I do have a s-10 extended cab 3 door and it is a daily driver that I want to make into a competition truck. Current box is supposedly 4.75^3 at 36hz? I think the hz is correct. Have to double check. It was designed by ram-designs. It's a angled back or trapezoid style box. Top is 14x43, bottom is 20x43 and it is 18 tall. I come uP with 5.4^3 after sub displacement. What do I need to do? What is the difference in a comp box vs a ported box?

Add me to the list that can break windshields on call http://audioforum.termpro.com/cgi-bin/ubb/...40;t=019121;p=1

I purchased this sub on closeout from Parts Express earlier this year when TC-Sounds was filing for bankruptcy. My daily enclosure is a sealed pair of RL-i8's. I'd like to build a ported box for this single TC-Sounds 12" sub but I'm a complete noob when it comes to enclosure design. My typical listening style is loud SQ; typical artists include Smashing Pumpkins, NiN, and Daft Punk. Any suggestions? This is just for fun, so feel free to be creative.

Hi, I've read everywhere I could, but I get very different informations!!! My enclosure is about 4 ft3 and has a round 5.6"(diameter) PVC port; port length is 14". It sounds good, but I 've read that port area should be much bigger : 4 (ft3) * 15 = 60 sq inches. And my port is far from that. I don't really know the actual tuning, but I would like it to be around 30-32 hz. Do I have enough port area ? Or enough length? Enough port ? Please, help me !!!

Friends Does anybody know any alternative methods in contacting Custom Car Audio Home I am trying to order a box but can't seem to get a reply either by phone or E-mail. I also tried contacting fisher customs and have not gotten a reply from them either. R, Julius

Ok so my buddy is putting 2 old school JL W6 15's in his extended cab frontier. About how big should his box be, he wants to go sealed. And which way should the subs face? Towards the back of the seat or facing up??????

in a 4th order bandpass, is it generally better to have the magnet in the ported section or the sealed section of the box? it seems like you would get added cooling from having it in the ported side, but would the motor obstruct airflow to the port?

Hey SSA Members I have 2 Mtx 9510-44 that I am looking to design an enclosure for, now I'm not to sure if its possible but I think it is, I would like to be able to do hair tricks, for power I have a Lightning Audio 3000 watt mono amp which is putting out a steady 1900 watts, the car is an 03 cavalier with factory electrical big 3 and two optima red tops. I'd like to fire the subs forward and possibly run the port on the rear deck lid sealing off the trunk from the cabin. my max dimensions are 36x16.5x24 I dont think it needs to be that big but I am new to hair tricks so I need some direction Thanks everyone.

For 2 Fi BL 18s in a box that is 2cuft over the manufacturers recommended enclosure size the final net volume after displacement is 18.29. I have the tuning freq set at 33hz. What would you guys tune this box to? Or should i keep it the same? Thanks!

Wassup y'all, I'm about to start a box for a 21 in death penalty. I'm going for 9 cubes at 30hz with 3 8in aero ports which equals 150in of port area. Is that too much? I've heard the sub will not handle much power? Someone help me out haha

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…

Hi It just got to my head that I should probably get rid of the box I have and make one myself. The one I have was bought from a shop and I dont even know what it is tuned to or the cubic foot. From the outter measurements, Im calculating 1.75-1.80 cubic foot. Here are the measurements of the current box I have my Pioneer TS-W3002D4 Well, basically I want my own box so that I know the exact tuning and size. First, I would like to know if its good to have a 12" tunned to 32Hz since thats what I want to have my box tuned at. 32Hz with ~1.80cubic foot AFTER subwoofer displacement. I would prefer to have subwoofer AND port facing the same way and box measurements ~15-16inche…

well i competed today w/ my new amps. 2 rockford bd 1500's on my 2 kicker L7's in a new CRX and just thrown, finished at 3:30am we did a 147.7 on the new termlab. good thing is we didnt blow an amp so now we can progress instead of blowing an amp everyshow. now to play and get loud :boink:

Hi, i have 2 offers for subs one is for 1 mt 15" quad .7 for about 300-325 and the other is for some 10" xsite D4 which i was thinking to get bout 6-8 for 28 ea. so...which should i get?? i want spl btw i dont care much bout sq... edit: i have a SAZ-1500d and planning on getting a 2nd one

i talked to my cousin earlier and he was explaining different box designs to me, he said that he had a box that was a cross between a t-line and a horn design box, he sent me an attatchment w/ pictures of the different types but i cant find formulas anywhere, i used the search but none of the links for formulas worked so i was hopign someone could help me out... thanks

Ok so Im putting 2 12" xcons in the trunk of my grand prix gxp max dimensions are 35"W opens to 55"W 15"H 40"D. I want it ported what do you guys think would be the best box type of port which direction and so on I wont be building it but I also want the best and the builder Im using can do it. It is not a comp car however I play my music loud everyday and I want to be heard

Got a question: Noticed that spl meters seem to have a simple pressure sensor in them. Does anyone know the formula to convert SPL to PSI? If so, I may just make a home brew SPL meter to test changes made. I have a 3-bar map sensor sitting around which can read the barometric at first for calibration, then anything after that. Or am I way off base here?

I am trying to find out how many cubic feet i would need for 6 SA-15s in a ported wall It will be ran by 2 2600w soundstream amps and I willl be playing rap and bass tracks.

How important are 45s inside an enclosure? Also how do you measure a 45 and braceing?

I had a last minute change of heart and decided to scoop a pair of Obsidian 18's. Can anyone give me a general idea of what size to build it? I am still going to get a BC2000 or a SAZ-1500 (The sundown is so much prettier .-. ) and I would like to tune it lowish for chopped and screwed music. Is 26hz too low to be realistic for music? I don't listen to hardly any rock or metal, mostly slowed rap so tightness and accuracy are hardly concerns of mine (my xplodes are going into the fire pit though) What would be an optimal size for a pair of 18's? Once I get a feel for how big it needs to be, i'm going to see what dimensions I can squeeze out to keep the box as low as po…

i had a post earlier about this when i planned on making my sub box. however... i made the box bigger to 5 CuFt now and im curious if i could still be ok with (3) 4" aero ports instead of ordering up one more? :thanx:

I ordered 2 18 zcons Thursday and today I did some measurements and got 48w 25h 32d all inches and that's with my back seat out of my ext cab sierra I listen to mainly rap with a little bit of everything I was thinking around 32 htz for tuning there going to be on a saz 5000 I'm sorry if I forgot to add anything

Wonderin whats.better for 4 12 sa's d4.They will be going in a 99 crownvic.thank u in advance

okay, well I got some money for my birthday, and was thinking of picking up some mdf to build a ported enclosure for the SUV. Single 15" sub off of 600 watts. mfg reccomended optimal enclosure is 4 cubic ft. tuned to 34 Hz. My max dimensions available are 38.5" W x 24" D x 18" H Here's what I was thinking: 38.5" wide by 18" high by 18" deep (outside measures, using .75" mdf) Sub up, port back. Port 16.5" high by 4" wide by 28" long (acoustical, physical 23.25" since it will have a bend) gives a gross volume of 5.82 cubic ft, net of 4.24 cubic ft after subwoofer and port displacement, tuning of 33.8 Hz will be adding some bracing but not enough to bring tuning …