SPL & SQ / Fabrication

ok well I have been toying with the idea of 2 15's in a wall in the bug (13cf gross) but will that much air movein in their cause cancelation or something that would hurt my score more than help it. I also only have usaci comps up where I'm at so I am allowed to open my doors and such just woundering. Thank mc

Alright I think I'm going to start competiting in MECA. Sort of confused on the fuse rating thing though. Anyone wana help me see what class I would be in? I would like to compete in AS or Drive By. I think I would do better in AS to start off with. The local state record is 144.2 and thats AS2. Should I have a problem with that? Also one other thing. It doesn't say that I can/can't have an upgraded alternator. Should I just not put it on or go ahead and put it on? Not sure what to do in that situation. Also it says no resins or anything. Does that mean in the box? I can't coat the inside with resin? What all could I do to help get the dBs up? Thanks for any help. Mike

I recently brought a pair of LvL 4 with LvL 5 coils to go with my single Autotek MM4000.1D amp. I want to put these subs in an 07 Chevy Suburban LT.The idea is to keep my third row seats. That was the main reason why I brought a suburban instead of a tahoe. So far this is what I've came up with. *Note all measurements are external* Height: 23 3/8 inches or 28 1/2 inches if I go up to top of headrest Width: 49 inches Depth: 28 3/4 inches I went to 12volt.com to use their volume calculator and it came out to roughly 15 cft of internal volume space. I want to go ported with the 18's and I want to go both subs and ports facing up as apposed to subs up and ports to the rear. …

I know it may take some time specially being designed in mm (As I live in Aus) but can someone or as many people as possible confirm roughly these figures??? Also, feel free to use this design and enjoy!!! BOX HEIGHT IS 260mm, 224mm are Internal Dimensions as all pieces join to TOP/BOTTOM ------------ --------- Also I designed this for a 8" Rockford Fosgate P2D28 sub w/ a bit of extra port area for sub upgrades that may have up to 13mm in XMAX such as say a DD sub (P2D28 has 9.5mm)

I want to start this off early....give me some ideas on how to make it better.....Chad^2 don't even mention payment....the next time I see you I will pay you personally......start from the bottom guys....food?....music?.....type of judging??? I want to hear it all....

I currently have 4 cube after all displacement with 43.75 sq/in of port fireimg down the middle tune @35hz. I was told that offsetting a port to any Side would raise enclosure efficiecy And get louder.how true is this? my new plan is 3.8 cube with 50sq/in of port tune @32hz with the port off set. sub are fi btl12 n2 with the mmats hd4000.05 and dc xp 270 alt x3100 in the rear xs2700 up front in a 03 impreza sealed off from the trunck.

Hi, I would like to here opinions on Subwoofer designs, Setups, And enclosures for a Convertible to produce traveling low hertz bass with the top up and down. I have built many design in my 98 Mustang Convertible for Soundoff Contest and have hit as high as 154.3 DB's in a Usaci competition. This my car i have brough to the competitions Now i am looking to build a system using the back seat or trunk or both to produce that sound quailty traveling bass, not that loud rattling bass tat you can't enjoy in the car. has anyone done this in a convertible If so what speakers, enclosure and postions was used. I have thought of using a 3 high end 10" subs in the back seat in seal …

hey guys i need some help figuring this out.. i have a box with a slotted port.. the port will be 15.5 tall and 4.5 wide the question i have is how deep does it need to be? i want the box tuned to 38 hz the dimensions are 17x30x25.5 (HxWxD) for a total of 5 cu ft im waiting for this i have all of the box cut and ready to be put together other than the port.. btw this is for a mach 5 spl-15 i'll get pics of everything when im done too

i was wondering if anyone could help me with some plans for a box, for my 15" its an alpine type-r. i no, not the greatest. but its my 1st sub. the opening on my trunk is about 41" by 18" also i have a picture, if that helps.

Here is the car and the current sub : He's planning adding one more woofer and competing in espl, something similar to bass race (track chosen by the judges). Basically, I'm looking for some ideas on woofer and port orientation from the ones that have some spl experience Right now his top score is 144db @ 36hz, db-drag style, using a single 3kw Ground Zero 1.3000 and one 15inch 4hp clone by Ground Zero (Plutonium 15). Final gear will be 2 subs and 2 Atomic 5000.1's. What port and woofer orientation ideas do you guys have ? Even some tips would be really nice

Hello to everyone on SSAudio! I've been asked by my freind Aaron to use this section of the forum to help with technical, enginneering and just good all around mobile electronics information. I think in order to make this successful, Dave Edwards and I need to know HOW technical you want this to be. My company is an engineering based consultation and testing facility for manufactures, etc. I've got 30 years of technical knowledge to share so lets get the ball rolling. Thanks

I was wondering if anyone could help on a the best way to approach walling my truck off I have 2 18" zcons facing forward and the port forward and I want to wall it off I was thinking getting cardboard and getting the outline of the rest of the space that I need sealed off and putting it on some mdf and cutting it out but I can't think of how I would attach that piece to my box without wood gluing it so if anyone could help ibwould appreciate it

ok i have a 2002 dodge dakota extended cab, and i was thinking of putting 4 SA-8's in the back area after taking out the back seat. i will get the D4 coil configuration and run 2 off a dsc1000.1 and the other 2 off another dsc1000.1 (each sub will get 500watts) now i have no clue how to design a box, the only other ported box i made someone else designed for me and i built it. i dunno max dimensions of the box but if you tell me how many cubes it has to be i can figure out how to make that size box fit where it needs to, also for the "easy" factor id like to use aero ports instead of a slot port design, so what size and lengh aeros would i need? and where can i buy thos…

Just made my first go at this google sketch up and was wanting some feed back to see if i need to make any corrections i'm building for either 3 fi bl 12's or 3 psi platform 2 12's heres a pic of what i have came up with so far

I'm making a box and the port needs to turn. is it pretty simple like so... thanks...

well i was expecting a db drag. and i get there and there is like 4 judges that sat in the car to judge on overall sound. they said that my rl-p's were by far the best subs they've ever heard!!! needless to say i took first place and a $500 gift certificate to extreme motorsports. i was really wanting cash, cause i don't wanna spend any money on my car so i'll probably just end up selling it.... but either way i took first

i was looking up designs for front facing subwoofers/front facing ports.there was 2 designs that got me thinking......i see more people use the L-bend port on a suwoofer box .....like this and less people use a design like this im not a big box builder.....so can somebody tell me why most people use the L-bend instead of the dual chamber middle port design........is it because u get both subs working together in same chamber? and how would it change the air flow from side port to middle?

I am building an enclosure for my truck today. I will have 2.5^3 net before port behind my rear seat. I have a few different options available. I have a Rockford T1500.1 bd CP for power. I have already 6 Rockford P2 8"s, my plan was to do 4 ported. Would end up .5 each after port and all with a single 4" Aero Port. Would tune it around 29Hz Thoughts? Ideas?

Hi, A friend of mine who owns an Xcon15 has just built a new box for its baby monster sub. The old one was 3.5 cu ft at 32 Hz, and the new one is 3.7 cu ft at 32 Hz too. Not much more volume, the double baffle upside took quite a bit of what we expected. The new box has a kerf slot port : it's really beautiful, and was easy to do wit the design provided by Dylan. First try : got it !!! I will post pics tomorrow. Just wanted to say that the sound is different now. Don't know how to say it but it gives more low notes. We did not expect so much change!! And we love it!!! The owner had a processor(or active filter, I don't know exactly), he took it off. He turned the bass boo…

hey guys my friend has a cda-9855 that has a big green wire what does that do becouse it was cut when he got it will it work with out that wire thanks

http://www.teamgates.net/com.html

Hey guys, I just finished my box. Was all excited, i did i dry build first. just screw it in before glueing. After I built the box I take it outside only to find it doesnt wanna go in my car. YES I did measure twice and cut once, but i failed to measure the clearing distance of my trunk to slide it in. Here is the plan I went by 4cuft. at 35Hz Is there any way I can sacrifice any depth when putting this in my car? Height: 17" Width: 39" Depth: 16.25" Thanks for the input and flaming, Curt

Long story short, Everything is brand new. I have a 12 RE Sex that I built in a sealed box. The box was to big after I was done (1.66) so I packed the back wall with 2x4. Well after I had installed everything I had local shop try to tune the sub. They agreed it was missing the low and just had no balls. They suggested we use the same box and port it. Re specs for min port box is 1.5@35Hz. They said we could use the same box as it is 1.66 and they ported it using 3 inch pvc tube that was 7 inches long. It was night and day but I would like to get others opinions since I have put a lot of time and effort into redoing my entire audio setup. Here is my setup: Truck: 05 Ford F…

If the port area is 32.5in^2 how long do I need to make it to get 30-31hz??? This is for my 12" DCON.

Can anyone help me design a ported box for 2 RE 8's? Needs to be 1 cube, around 32 hertz... I just don't know how to figure out the Port Lenth (want a slot port), the external demensions (with port displacement), and so on... Any help would be great... Oh, it's not vehicele specific, just your basic retangular box... -BW