SPL & SQ / Fabrication

Does anyone have pics of there enclosure design/system used for new USACI Trunk Class? Or possibly a trunk system that does really well on the term lab?? Here's a link for the rules in USACI.. http://www.soundoff.org/rules.htm

So I have heard to get optimum spl out of my box and best proforance out of my sub I would have to find the resonant frequency of my car. So I fired up the SSA forum seachers and i didn't come across so I imediatly fired up the google machine and did some seaching and here is my findings: I can use math by: Now you measure the distance from the cone to the meter(the whole path it takes). remember the soundwave comes out of the front of the cone at 90 degress(straight) and out the back at 180. once you get the distance from the cone to the meter placement in inches, you divide that into 13,560. you will probobly get a high number, which is suspected. Since its 90 degrees, …

I am not sure what is the right way here? the sub is inverted and firing up. the slot port uses the bottom of the enlosure and fires toward the driver side. not sure where the sub would do best at. thanks chop.

I bought a box i just saw some of the glue is coming undone so im gonna glue it again and screw it down and seal up the inside. But i need to know what it is tuned to here are the measurments thanks in advanced. I have an L715 in a ported box the measurments are 16" h 40" w 17.5" d and the port is 3.5" w and 13.375" deep. I would like to know how many hz it is tuned too and how many cubic feet it is after port and sub displacement. Thank you

On the Termlab im hitting a 144.3 sealed up at the dash with a sweep. its in a trunked cavalier. i just want to know if i can get that score a little bit higher? would holding the trunk lid, sunroof, or doors down during a run help? would more room for air to get into the cabin help? does subwoofer box placement help, meaning how far away from the trunk lid it is, also how about rear seat folded down half way help? how about front seat positions? kind of just trying to get as much of an edge as i can. with the 144.3 run it was all set up for daily driving, not much tuning done at all, as in i didnt play with box position, or seat position or anything like that. i just k…

hey guys, this is probably a noob question, but i have an 18" fi q in my car with the bp option. i have it hooked up to a hifonics 1610 1600watts rms, i am running about 1200 (i set it with a dmm). its in a 6.3 cubic foot box after displacement, and its tuned to 31 hz. my question is, why is it that when my doors are open it sounds alot louder than with the door shut. opening the windows helps when im driving, but its getting cold and i wasnt sure if there was anything i could do to make it loud with the doors and windows shut. any help would b great. thanx.

hey guys i got a question for ya. im building a box for 4 15 fi ssd's and i was wondering if a box built at 15.5 cu ft. net and tuned to 32 hz with 200 sq in. of port. its going into a blazer. think this box will work? any info would help thanks.

What do you guys think of the design? Its for a DC lvl 4 12'' sub How would I factor in a kerfed port to the design??? If the kerf is secured as an external portion of the port, will it affect tuning or require a change in design anywhere? Specs come to: -2 cubic feet before subs displacement -32.5hz tuning -36.25 sq inches of port area

Im pretty sure Ive seen this before. wondering how the port length is calculated. say the port opening is 3.75x13, Id assume when it splits Id make each continuance of the port 1.875x13. do I measure the length of the first part before it splits, and add to it the length of the part after the split to get the overall length. do I calculate the length as if I were running 2 1.875x13 ports, or a single 3.75x13 port. with the box volume and tuning I was using, they were very similar, 29.6 for one and 28.92 for the other scenario, so either one would end up close enough, but Id like the know the correct way. if either of these are correct.

I have decided to go with Selenium ST350 Super Tweeter, and Selenium 6W4P 6" woofer. I will be running thes active and have a copule of questions about them. First question: one being will it sound ok to mount the woofer in the stock door, and the tweeter in the stock dash. I will have to modify the dash a little bit, since the hole right now is 4", and mounting of the tweeter is 4.25". Will it sound good with it located up there? Next question: Since this is my first active setup, I dont want it to sound like shit. So, how do you guys block the mid sound from going to your tweeters? and stop the real lows and real higs from going to the mids? I will be running a MB Qua…

So i was metered today and this is what i got... 144.6 Outlaw under the floor @ 39hz and an oddity i scored 145 @ 39hz legal on the windshield The shop i was at thought it was quite odd that i was hitting higher in legal than i was outlaw. 15 fi bl on a saz-3000d @ 2 ohm

I want to check some numbers but Im not sure if there are any trustworthy sites.. Got any?

here is a pic of my trunk: I have a 12'' DC lvl 4 sub. I drive a sedan. I like to listen to a lot of pop rock // pop punk // metal music, some have fast bass drums//guitars I think I'm going to go with some type of ported box, which should I go with? a slotted, vented, ported, or what? Can anyone help me design a box for my subs? I also don't know which way to port it, towards the trunk? I'd like to have the box toward the side of the trunk, so I can still fold down the back seat and access the trunk.

im about to trade for 2 SSD 18's just to mess with for a bit. so im planning on running about 11.5 cu ft at 35 hz, but gonna make interchangable ports to play with different frequencies. so should i port it forward, or up. subs are gonna be facing forward in a 01 dodge ram ex cab BTW

Looking for ideas based on experience! My shop has a 1998 Chevy extended cab being used for SPL competing in USACI Modified. We will be using four AddictiveAudio V4 15" woofers with roughly 12,000 watts rms. My question is how should the enclosure be built for max spl? Just looking for ideas here.. we are stuck at 157.6 db on the term-lab at drivers kickpanel.

Ok guys ive been looking at some system setups and i found what im wanting to go with. Im looking at ordering 2 BL 10" subwoofers, well want im wanting to do is my truck currently has a bench sit and i was going to get to bucket seats and build a box/center console bewteen the seat and what i was wanting to know if the 10" will work in that spot and still have enough air space to beat down im trying not tunnel my truck because it is going to be bagged and not sure where im putting every where yet. I have a 90 Toyota Pickup Single Cab so if u can let me know that would be great. Here is a pic of a sample of want im waning to go with. The speakers in this truck are 8" spea…

As the topic says I am looking for any and all tips to improve my SPL. After some REAL quick testing that I'm not to sure was accurate. I was told I was doing a 143.5 Legal @ 32Hz. I believe the 32Hz part, but I'm not to sure about the numbers. So any tips, tricks, or ideas you have. Throw them my way. oh and BTW I know I need more power. I'm working on that detail:

just bought a 18'' fi bl dual 1 ohm im runnin 2 ohm 2 a 1200.1 jbl.. im installing it in a 96 yukon..4dr. how should i build the box , which way should the sub face ..and port...how many cb ft...thanks..

I have a question about ports. I am having finely decided to use round ports. But I have a problem; I have 8.89ft3 I want to tune around 38 Hz. The problem I run into is I need like 15’’ of port. The box is only 14’’ deep, going with 2 8’’ ports. So, can I bend the port with a 45? So it will make it in to the car with out a problem. If yes, do I have to add any thing to the length, or do I just cut the tube where it needs to be and add the 45 in between the cut peaces. Trunk setup subs up, port up going thought the rear deck.

I was wondering if the calculator here ; http://www.psp-inc.com/tools.html calculated it's tuning including displacement of the tube or without displacement. Thanks.

okay, so I drive a 1995 honda prelude. I just got my nightshade 12 about two weeks ago =], I am running it with the saz 1500, I have also done my big three. I feel my nightshade isn't at the full potential but, it could just be my box. Off the top of my head I can not tell you my demension, all I can tell you is that its 2cuft at 33hz. I am planning on building another box very soon. I would like to know what input anyone has on they're 12" nightshade and there boxes and how they sound, also anyone with a prelude and where the have there sub mounted and the port faceing. Thanks, Jordan

I'm just trying to design a new box for a 93 civic hatch. Just wondering if anybody has any suggestions for me. There will be 3/4'' all-thread rod for bracing. The box is for 4 12'' pioneer premier ts-w3002spl. It will be in a wall config. subs on driver side port on passenger. all thoughts are welcome. This is what i got so far.. http://memimage.cardomain.com/ride_images/3/3224/1061/33058030018_large.jpg

Cuz im going to compete i could use some test tones, if anyone has them, please email me or send me them on MSN toom585[at]hotmail.com

I am trying to plan how I am going to build a box to go in the ex cab of my toyota truck. I am putting 2 Fi Q15's in it. The space I have to work with is 53'' wide 17'' depth and 22'' tall. I was told to use 1 layer of 3/4'' MDF then after the box is done add a 2nd layer of 3/4'' MDF to the outside of the box to help reinforce it, is this right? This is the first box I have build so I just wanna make sure I get it right. But this is what I have come up with so far, how does is this right, the subs call for about 4 cub feet each tuned to around 33.

I have a 99 Siverado 3 door. What I want to do is take back seat out and build a box for subs so they will be behind driver seat stacked on top of each other. Take back seat and get cut so I will still have a half seat back there. No one in my area wants to deal with it. Is this a good idea? I just want my trunk to be able to carry 3 people instead of just 2. Would a ported box still be okay on one side of truck?