SPL & SQ / Fabrication

Here is a link from CDT that has basic knowedge on staging, also includes many install guides and specs for their products. http://www.cdtaudio.com/downloads.htm

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?

okay new here and was told that you guys could definitely put me in at least a general direction. here goes I have a customer who had three 12" L7's powered by 3 hifonics bx11200's in the trunk of his 96 J30. the box it self was a sealed, non-separated, box that was just big enough to wrap around the woofers and fire at the rear with the box jutted up against the gas tank that resides there. he is asking if there is any way to build a box that would be noticeably louder yet still retain the punch of such a constrained box. he doesn't mind the loss of his trunk so but the real challenge is figuring out how to get the sound to penetrate through the obstacles within the trun…

I have loved my 18's since I got them, but due to a baby being on the way, I have to get rid of the 150 pound 12 cu.ft monster in the back of my little XUV. I'm replacing them with......(drum roll please)...... A pair of Critical Mass UL 12's! I hope to god that they fit the bill for me output and soundwise.

Alright guys here it goes... Trial 2! for my woofer box.... My current design is 31.5w, 22d and 16.5t. I don't remember the wood thickness but I found a scratch paper and I only made my box 3.5cuFt... Which is the smallest they recommend for a level 5 15". Why I did that? I have no bloody idea.... Anyway I re measured and I can add a little more to the box -- roughly 2.25 inches on top, and 7.5 inches on width. I would like to try and reduce the dept the most I can because as of right now I cannot fit more than one battery back there. I would like to be able to lay my amp down nice and neat and have the bat next to it. I will be trying to design my own again but I woul…

I've got a pair of Kicker comp CVT65's just laying around and I thought I should do something with them. the manual says 0.2^ft sealed and well.......that sucked. wondering if anyone on here has any experience with these in a ported enclosure or any other recommendation that might make them work.

dont know if it is posted anywhere if so i apologize but i was wondering if anyone here is willing to give me a sweep and some test tones from 20hz to 70hz or somthing please??? i might even gift them some cash from paypal

Would it be a good idea to cool your coils down to less than 0*C before your SPL run. One of the ways i have thought about would be to spraythe duster cans upside down int the pole vent. Only problem i can think of is if you got alot on the spider. Lower temperature means lower resistance which means more power.

Hey guys im considering getting this passive radiator for my Fi BL12 TC Sounds VMP 15" The reason is i dont have room to port an enclosure underseat but i may be able to fit this. If i decide to go this route im going to design a port for the enclosure and then calculate the mass of air in that port to add the the PR, is this correct? I just want to run this idea by you guys since you all know so much

Which enclosure do you prefer and give your reasons for sayin so. Just trying to see who likes what type of enclosure the best. Me i am kinda in between you can get a good all around sound with sealed, given enough power to run push it. I used to use a lot of sealed boxes because I really didnt have the room for ported boxes given the subs i was usin. Now I have switched to ported since subs now work in ported enclosures the size of what the old sealed subs used to work in. Also which one do you think handles ungodly amounts of power better.

i was looking at the 6x6 in aero ports at parts express but the only boxes ive ever built have been slot ports so i dont know anything about it, how much air do they displace?, or how do i get a turning freq. with them, and just the basics i quess? idk thanks for any help guys

I recently got my system all finished and was wondering if there is an app or something i can download to get an estimate of how many dbs i'm hitting. I know some people that have termlabs but i don't wanna drive an hour for a 5 minute test.

Hey guys, Will be building my first box in the next week or so and I really just want to make it right the first time so i would be really grateful if you could check over my numbers before i go any further. Specs 2003 Ford focus 12" SI Mag re coned with fi softparts. So basically its the same spec as a Fi Q Aim 32 hz @ 2.5cuft (biggest recommended box for this sub) Subwoofer displacement - 0.16 cuft Port Displacement - 0.69cuft (Really didn't know how to work this out! Do you calculate the port as a separate component or just account for the wood that makes the port if so this is wrong) Baffles displacement - 0.10cuft (in my design i have quite a few baffles to brace t…

2 12" type r's 1000wrms Sorry about crappy pic, its with the cell phone.

What should i tune my box for a JL 13w6?

I don't really want to order this stuff and have to wait for it so i wonder if i be alright using some things just lyin around the house? The space i got to fill isn't too large really. IT's about 3-4" wide and about 8" tall and the deeper the better. I was thinkin about stuffing all kinds of shirts that i dont wear anymore in there.. I'm sealing a wall and i gots to seal around a window and i'm not spraying foam on my glass so thick material is the only option. You think shirts or blanket sheets will work fine?.... then i'll just spray foam on this to complete the seal...

I have made a ported box just over 1 cubic foot. This is for a 400rms, 10 inch sub. For a 2.5 inch wide pipe, I need 11 inches long for a 32 hz tune. IS IT OKAY TO USE 2 PORTS? and what type of pipe do I get? Can I just run to home depot, find a strong looking 2.5inch wide pipe, and go from there? and are 2 ports okay to use, even if there the same length?

Hello all, I have discovered I am going to have to build a new enclosure for my subwoofer to fit in the current vehicle I drive to work. The car is an early 80's sedan with a large but shallow(height) trunk and I do not really care if I have much space left over. I am pretty good at building things and have no problems making a pretty elaborate box, so my question is: In the trunk of a car like this what is the best enclosure to build without walling off the backseat? Any suggestions would be greatly appreciated! Thanks in advance, Mr_Jones

I was looking @ this video and this guy made this video with 4 15s and it was 2 of them at the top and 2 @ the bottom.Anyone an expert on making these kind of boxes I want one made in my car. here is a link <object width="425" height="344"><param name="movie" value=" name="allowFullScreen" value="true"></param><embed src=" type="application/x-shockwave-flash" allowfullscreen="true" width="425" height="344"></embed></object>

i wanted to get the maximum amount of cubes i could get in my small pickup so i was thinking about a box that has shared chambers. are there any cons or bad things about a box for two subs with a shared chamber? its going to ported also and its for two fi bl 15s

I'm posting this up again....... THIS time heavily revised, it now has slot port calculations, and CUT SHEETS! This EXCEL based box calculator will take your enclosure size, woofer displacement, the wood thickness you plan on using and the frequency you wish to tune it to and gives you the GROSS enclosure size, dimensions (Including CUSTOM dimensions in which you input two of the OUTSIDE measurements and it gives you the last one.) PLUS gives you the cutout sizes for each panel of the enclosure you just asked for....... I'm putting it out for real world testing to be sure the math is good and the cuts are helpful......... Let me know ASAP what you think and what proble…

This is for 2-10" Alpine Type-R subs (SWR-1022D), and will be powered by an Alpine MRD-M501 amplifier rated at 550W into 2 ohm mono. These are my inside dimensions: Height 10" Depth 10" Width 15.25" Total is .88 ft^3/sub Total outside box dimensions are: 11"x11"x32" I need to put this box underneath a rear strut bar and from the bottom of the bar to the trunk floor is 11 1/2". Will this work or should I scrap the strut bar and build a taller box? Any help or suggestions are appreciated. Ed

Last time i made calculations I didnt account for a few things including the end correction of my slot port. I hope somebody with a lot of enclosure knowledge can help me out with this. Port Area 126 inches2 Port Tuning 32hz Port Internal Dimensions 9” x 14” x 39.85” Port Displacement (8.25” of the port will be external)(31.6” Internal Port) 9.75” x 15.5” x 14.25” =1.24625651 cubic feet 9.75” x 15.5” x 12.1” =1.058 cubic feet 1.24625651 + 1.058 = 2.30 cubic feet + 0.18 cubic feet (Subwoofer Displacement) = 2.48 cubic feet (Total Displacement) Subwoofer Dimensions Needed (9.23 cubic feet) 36 x 15 x 35.75 = 9.231 cubic feet before displacement 9.231 – 2.48 = 6.751 cu…

OK i need to run through and make a check with yall to see if my demisions are rgith for this box and its ports ok the box has 4.6 cuft and it will have 2 re sx 12's each displaces .16 cuft and a port that displaces .24 cuft so total displacement = .56cuft which gives the box roughly 4 cuft so i have the port 15w2H14L = 33hz does this sound ok

Here is the show for an invite to Finals event_102404.doc