SPL & SQ / Fabrication

if i bought 10 of these and made a super big ported box ( i think they are supposed to be IB?) would it sound worthy of the money i spent (slightly more than the daytons)? spl is more imporant, but sq cant just be dismissed. I found a ultra cheap in-wall 8" subwoofer. 22 bucks. thump option 2 I would be using those instead of four dayton 12's Boom option number 1

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?

car- lexus gs300 music- hip hop and rap sub- audioque sdc2.5 12 amp- jl audio 500/1 max height- 14.25 port tuning- figured 38 max depth- 14.125 max length- 31.125 using .75 thick mdf i get roughly 2.75 cubix feet.. so i figured with sub displacment and port i would be at about 2.5 which is what audioque is the biggest i should run the box.. now with the port i put in 2 inches wide by 8 inches tall and i would need a port length of 7.51 inches.. now my question is does all that sound about right? should i have the port longer? when i did the port at 14.25 tall and 2 inches wide it said i needed a port length of 14.71.. basically just looking for some advice on what to do…

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

I want to create my own blueprints for my own boxes. Is there any tutorial of some sort to organize and create my own blueprints? What about a tutorial for BassBox Pro? Thank you.

I know those precision sound ports from parts express are pretty popular so i am thinking someone might have an answer for me when using the psp flared port length calculator (http://www.psp-inc.com/tools.html) is the "flare length port required" from the ends of the flared portion of the port? or is it the straight length portion that the flared ends connect to? thanks in advance

Ive made my own ported boxes in the past but nothing more than a rectangular ported box with f-glass. I dont want to pay a shop to make my box, I want to build it myself. Its a 2000 grand am. Back seat obviouslly removed. I dont really understand how to do the edges and different angles. to take up ALL the space. Or do I forget angles and just do what I can. I was going to do it all in fiberglass but that is probably a stupid idea and a stupid amount of work. The only other problem is how to calculate volume with so many different angles and how to exactly calculate how to measure the bracing and port volume. If anyone has a site to direct me to that deals with Wall setu…

Building the box tomorrow. 2 JL w7 8 Inch subs (sold the 12's, these are to cool looking). Sealed or Ported? Used for Rap Music. These are each being powered by a JL 500/1 until I order Sundown Amps.

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.

I need some advice on whether to go with 2 btl 15s or 2 btl 18s. I have about 16 cubic ft of space to put a box in my car. I will post pics of the car asap. I am just looking a system that hits hard hopefully around 148 to 150 dbs.

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.

I came across these pics and was wondering if i could install some 8" mid-bass drivers in the same location. SQ/imagining is what i'm concerned about. Would it fly or should they be installed/positioned somewhere else?

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.

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.

So I have a 2007 silverado crew cab and want to put 1 12" Fi BL with all the upgrades and a sundown 1200d in there. My deminsions for what I have room for are 55"long x 15"deep x 4.5" tall at the back and 8" at the front of the seat to the floor. In the middle its 6.5" Im going to probably lift the seat about 1/2" as thats how much thread I have to work with and theres no seat raising brackets yet for my truck. Im looking to do the 12" in a downfire ported box Can someone tell me if this would work or not? My sub would be 6.5" deep and my depth of the box is Im thinking going to be right about that.

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...

alright ive came to the conclusion that with school and measly allowance i dont have the time or money to get into the really competitive comps, but i remeber hearing that some compitions have std size truck divisions if thats true how is that division broken up? if there is such a division im going to try and be running 2 SS rl-i8 around 800 watts rms (if youve seen my newb sign in you know why i have to try). do comps break down divisions by power number of speakers size of speakers....thanks sorry according to my eng4 teacher i have horrible paragraph structure and sentence flowing skills

So I'm installing a Xcon 12" and was wondering what would be the best placement of the sub and port? Size of the box and tuning? Or if I should so sealed and ported? If ported what type of port? It is going in a 01 eclipce hatchback!

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

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

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

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…

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

I'm planning on building a wall in my Lumina, I'm in need of a design. My set up will consist of 1 DC power engineering 270 amp alternator,~3 deka intemidators, 2 Audioque HDC3 18's in a 12 Cuft wall with a removable port tuned to 38 for daily and higher for comp. Lastly to power the subs a Sundown Audio 3000d. here are some specs with pictures included. Pictures w/ measurements Height: 37 in Width: 29 in and at the curve 38 in from the hump to the roof is 38 in 33 in from rear deck to seats 46 in from bottom of the floor to the ceiling 55 inch from door to door More pictures (P.S. I know my carpet is dirty. M5 already made it apparent)

hey im workin on my third box build and i want this one to be perfict i need help on the port i wanted it tuned too like 33 htz and i dont know how to caculate that can anybody help me if i give you box demention and mdf thickness ???