SPL & SQ / Fabrication

hey im putting 4 l5 15's into my van but was wondering iwhich way i would be louder, if i had 2000 watts going to all 4 so it would b 500 a piece or just do 2000 and only hook up two for 1000 watts a piece , in my spl class for this year i cant exceed 2000 watts

My boy is about to buy a 04 monte carlo. He wants something loud in there without sacrificing the trunk to much, I wont have any measurements for a few days but I wasnt sure if anyone has built anything in one these and mite know some ideas for speaker and amp brands

So I designed and built my first ported box on my own, and it does not sound like i anticipated. I believe you all can help. The box is for a single 12'' Fi X with 1.6 cuft @ 31.00 Hz. The sub has a 0.1 cuft displacement, and the Fs is 25.7 Hz. I was told to tune a little higher than the Fs. The O.D. of the box is 16 x 14.75 x 21.625 The port is 8 x 2.25 x 27.875. I used WinISD to design the port. I used 11.25 sqft of port area. I was hoping for it to be musical and be able to go from high freq. to low freq. without problems, but it bottoms out easily on the lows and makes mechanical noise on the highs even with my active cross over set to 35 Hz with a 18 DB slope. …

hey whats up im looking for some copper buss bars to be made or ordered or even shown how to make em, i need each of them to have 4 3/8 holes in them i need 4 of these i would like to run 4 runs of pos & 4 neg from front to back battery

Does anyone have the specs for the Fi BTL 15" subs. I am installing 2 of them for a customer, but he doesn't have any perameters for the subs. He is putting a Hifonics Brutus 2600 watt RMS d class amp on each sub. It is going to be in an old school s-10 2-door Blazer walled off right behind the front seats. Built for competition only, wanting to hit the biggest legal spl number at USAC competition. Any help would be appreciated. Thanks

about 2 months ago I (with the help of M5) set up my first 2 way active system. Since I have lost the rear speakers and I have my sub crossed in at 50 htz with a 18db slope I now have a serious lack of sound from about 60 to 140 htz. The Bostons I had just would make this honorable noise at about 150 htz, just muddy and nasty. So i just got myself a pair of the new Rockford power components and STILL THE SAME PROBLEM what do I do??? I have already put dynamatt in the doors and on the back of the door skins. Do i have to take this thing 3 way in order to get some mid bass?

What are the differences between the alignments QB3 Quasi-butterworth, BB4/SBB4 (Super-)boom box, C4/SC4 (Sub-)Chebyshev, EBS3 extended bass shelf -3 dB, and EBS6 extended bass shelf -6dB when using WinISD?

Hey guys! This is my first post on this forum, so please excuse me if I'm breaking any protocol. Anywho, if anyone's interested in Digital Designs' new T series subs, check out the link below in which I posted my build thread. I realize it's linked to Elemental Designs, but that's only because I was initially considering the use of their 8" sub. I can't compare the two, but let's just say that I am THRILLED with the performance, sound, and appearance of DD's T1508. I couldn't ask for anything more... well not from an 8" sub. Don't take that the wrong way, though. If I were to compare to anything at the local Best Buy, I'd have to be looking at a single 12" or a pair of 10…

I'm in the process of starting a new install in my '95 Probe. Purchasing a DD 3500 series 15 and RF 1000a2 from a friend. Initially I plan on running the box he was using in his Explorer which is around 5cf. with 3 4" aero ports, can't remember the length. I'd like to build a new box to better fit the Probe, and I'd like to see if I can't get a little more out of the setup in the process. In the Explorer this setup has metered at 147.?db and I'd like to see if I can't manage 150. Any suggestions on box design would be appreciated. I'd like to keep it tuned low ~30-32hz.

hey whats up im new to spl, i have a 94 ford econoline van i have competed in spl for 1 year this is my first , and i love it, i have 4 l5 15's im puttin in a box, the box will have 13.3 cubic feet of airspace i do not want to wall but i want to be loud, i was thinking about sound deadening my roof and floor basically everywhere is it a good idea or no, i was also thinking about removing my middle row of seats, to let more air go by, any hints or tips on making a van loud without walling, or any tips on what i should do , thank you

I just need the basic rundown, what kind of materials, (do I just go to Homedepot and ask for resin??) how to apply it?? thanks!

Which one do u think will be louder audioque hdc3 15 or t3 audio tss 15

I understand that if you have the same setup you need to double your wattage each time to get 3 db louder. My question is when you get up to say 4kw and you have to double it to 8kw to get 3 db louder is there a significant difference in loudness? Is it the same audible difference than say the same setup at 200 rms is doubled to 400 rms.

Thanks in advance for the help. Alright I am planning on getting a 12" Fi Q D2 and already ordered a sundown SAZ-1000D to power it. I've never built a box before and I dont trust the audio shop here. I want to build a L shaped ported box. Its going in a 1997 chevy blazer so I have room. First should I go sub up port back or sub back port back? What are the benefits of each keep in mind I'm not going for spl. According to Fi "Ported box we recommend using 1.8-2.5 cubic feet @ 28-33Hz (I personally think that a 32hz tuning is optimal, and has the most output and is still the most musical daily driving). Use 12-16 square inches of vent area per cubic foot of volume." So I…

Ok, so I called Pioneer to check and see what they recommended for a square port and they told me 1.65 ft^3 per sub 7in^2 of port per sub 6" deep. Which seems SUPER tiny, but when my boy (BngBlzr) had 4 TS-W306DVC's in his blazer with the same specs, shit was loud. So I got the box all built, and I am NOT IMPRESSED. So what do you guys think for port, I don't want to rebuild the whole box, preferably just the front where the port is. The link is to my facebook photo album where pics of the box are. I am trying to locate my piece of paper with the dimensions written on it to throw that in here for you guys to play with too. LMK what you guys think cause from hearing his 4 …

Hey, i'm gonna spill out all kinds of info so make sure you understand it, hehe. I'm currently workin on your design right now, you will be using external dimensions of 42" wide x 17" tall x 22" deep. This IS what i am going with. You will be using a double baffle on this box. Box material will be constructed out of 0.75" material. I need to know what bracing material you will be using, Wooden dowels or 2x4s? Internal dimensions- 40.5" wide x 15.5" tall x 19.75" deep. Your speaker Outer Diameter is 10.91", i went ahead and rounded up to 11" for a hair more headroom for accidental measurement inaccuracy. Your Baffle design- The border around this baffle is showing the th…

I don't want to keep bugging Jacob if other people here can help. I am building a ported enclosure for 2 Sundown SA 12's . A few questions , would it be good to tune them at 36hz? They will be on a Sundown 1500. Also, What i really need to know more then anything is the port dimensions. The max dimensions for my trunk is 22 Depth, 33 length, 16 Height. A sketch up would be really appreciated with the port calculated and what not! I will return the favor in some way *Shizzon are you around?*

Hello, I have a 15" Icon sub in a (about) 4 ft3 enclosure, tuned to 30something. The port is just a 6" round PVC tube. I know I have not enough port area. It sounds good But, with the same total volume, would it be better to make an enclosure with the kind of port I can see in all the pics here ? I don't remember the name, sorry! I want to get the best of my sub. (I listen to rap, r' n b and reggae, and I have a saz 1000 amplifier).

Hi, Just wanted to know if anyone is going to the DB Drag World Finals. We may be competing this year providing we hit our target SPL score which is 160db. We currently compete in Street C and are hitting 1580DB in the UK. Are there any street competitors here on the forum? What are you hitting at the moment and what do you hope to be hitting at the World Finals if you're attending?

has anyone here tried to build an 8th order bandpass. i ask because i have had decent succeswith the 4th and 6th orders but now im thinking of trying a 8th order just for spl and was wondering if anyone had any experience building one

I just got done discussing with someone what i am doin with my wall in the car and have found a solution, a very cheap solution. I need to have my wall flared on the inside and outside to try and achieve higher pressure levels. My port area is 16.5" wide x 11.25" tall. Look at the bottom pic to see what a Bellmouth port looks like- for my application - There is a guy around town that can make me ANY custom size, flare, etc for my wall so i told him to hold off for a couple weeks while i test other things before i venture in flare port testing. I have some questions though so i can get him to make the proper size. The outside flare can stick out of the box a MAXIMUM of 5…

Ok, let's say you need a larger enclosure for SPL competition and you have ran out of port options... You need a larger enclosure... would polyfill help or would it actually drop pressure potential... My ports are starting to tune past my peak and i can't enlarge my port area too much more... Was wondering if i start dropping polyfill in the enclosure if it will not only start to lower the tuning back some but keep me gaining as well... Is it worth a try?

Hey Guys Call me a NOOB or Whatever you want, but i need your help, i have tried Kicker L7's, Pioneer Premier Spl, Alphasonik Mayhem and not really achieving alot , only the kicker sounded good but you only get one type of bass, now i want to set up a system thats gona be loud outside and shake the ground, i need your help here because i'm gonna try FI's should i get BL's or BTL's and should i go 2-12" or 1-15", i have a 09 sonata and currently have a MTX TE1501D amp but will upgrade to MMATS 3000.05 next month my trunk is huge but i still need cargo space, so i'm willing to sacrifice 36W x 17H x 19.5D, can you guys plz help me with a box plan also, i listen to mostly r…

Ok, this is giving me a headache... I dont know the exact volume of the box but it's somewhere between 12-13.5 cuft NET or it should be... This is what i've got and cant figure out why... I had a port 25.5" long that peaked at 50hz. I then had a port 22.25" long that peaked at 51hz I then had a port 20" long that peaked at 52hz I then had a port 18" long that peaked at 53hz I then had a port 16" long that peaked at 54hz The port extends through a double baffle (1.5" thick) and sticks out of the box 5" I always cut off the port length on the INSIDE of the box and retest. My peak frequency is 50hz. My LOUDEST port test was at length - 20" which peaks at 52hz but is loudest…

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.