Fi Technical

Will 2-18'' BTL's be happy with 2000 watts per sub? And will they play with 2000 watts each or do I need to put 4000 watts per sub? Need to smoke 2-13" w7's. Can 2000 watts per sub do it???

Hey i just bought a 15" bl. i was looking around and everyone said a 4cubic box would do but anyone have any cut outs or exact directions. im not sure what i should tune the box to? hertz?? anyone have any suggestions!

Alright i'm in need for some help designing a box for my 15Q. Its going in my Diamante. The largest outside specs for it are 36 wide, 24ish deep and 16 high. If anyone could help it would be greatly appreciated.

Ok So box build is going nicely so far. Im working 16 hour days cause well im greedy and i soak up whatever over time is avalible..So iv slowed down a little bit... I hit a 140.4 with a sine wave... I then hit a 139.9 with music... Is this just because I didnt burp it? It seems as though the Sine wave and the Music are way to close.. Im just curious is all and would like to know before I go and re meter with the new box...

Im going to get 2 12" SSD's if i want to wire them to a 1 ohm load should i get the dual 1 or dual 2 ohm. subs.

I just bought a 15" FI-Q and now I am debating between amps. I looked at a high end: memphis mcd1000, Rockford Fosgate Power T10001bd, Low end: Hifonics BX1206D, Memphis PRD 1000.1. Any suggestions for an amp..or any listed that I should go with? Secondly, I am unsure if I should go ported with a low tune of 28-32hz or just go sealed with it. I want it to bump hard, deep bass and want some sq out of it. SO will that low tuned ported box give me a good sq but also hit hard?

Whats up, Can anyone give me advice on how many cubes my sealed enclosure should be and what it should it be tuned to? I will give it hopefully 1300 rms with a hif1606d. I listen to about 80 % rock/classic rock/metal/blues/acoustic live chit and about 20% rap but I will probably listen to more rap since I will have a sub. The sub needs to play 80hz and below. My goal is pure sq not spl Thanks for any input Captain SSD(lol and its gonna be a q)

How much can these take cuz my saz-1500d is feeding them pretty well but sometimes it sounds like they can take a bit more power...???

I tried to get the most port area possible using an "L" slot-port. The box is 39"x18"x18". I wasn't paying attention to this when I designed (threw together) the box. Fi recommends 12-16 square inches of port for every cubic foot of interior volume. 48-64 I have 74.25 square inches of port and 44" length giving me a tuning freq of 31hz. And here's my question, should I (could I) do something (short of taking the box apart) to reduce port area, and raise tuning? Specifically, can I cut another 3/4MDF piece to fit snuggly in the port to bring the width from 5.4 to 3.75...or similar?

Hey scott, nick, or shawn, What box size and tuning frequency do yall suggest for my sub? The box I have it in now just isnt working. The sub sounds like it is bottoming out on certain frequencies and i only have the gain about a half of the way up. Its currently in a 2 cu. ft enclosure tuned to 33Hz. Any suggestions would be greatly appreciated.

Any thoughts or ideas on 2 12" FI BTL's (Fully Loaded) in 5 ft^3 with almost 154 in of port area????? Tuned at 32 hertz.... I understand that it is going to be an extremly long port almost 71 inches. but i have ideas for that.....Planned on using 14 inch round pvc pipe with a few 90 degree elbows in it. and how would u go about measuring something that has that many bends. Also i planned on the port having its own chamber with only the end into the part of the box where the subs are to reduce flexing and hopefully where more air flow goes into the port. But it might be a crazy idea. So if anyone could give me some feed back it would be great!!!! Thank's, Brock

I am loving those FI x specs, and it has a strong BL as well I wonder why these didn't sell as good as the others.. It almost seems like its a good as a subwoofer as a ssd but cheaper. Im no expert but looking at teh specs it has a stonger bl. more efficient, lower fs Did we miss out on one hell of a woofer? or I know I did. IT has a nice xmax as well.

Ineed a box for 1 18'' needs to be sealed.I can build one,but dont have the resources nor will my park let me.Stupid country club noise regulations.Shops only build 10s & 12s around here.Can someone help me please?

I have two 15" SSDs with copper coils, going to be running them off of a Kicker ZX1500.1. I don't have a lot of room to work with after I reinstall the back seats of my truck and all, and I was wondering if anyone has had experience running them in a sealed enclosure? What's the smallest I can afford to run?

Fully loaded BTL 15" w/ single saz1500d sounds like a whole bunch of sealed 10's. Except it goes lower and gets louder. The Police's greatest hits sounds great. I'm having some front stage issues, so I've been focusing on the bass... This BTL has great SQ! Better than my friends believed it would sound. Better than I expected too. I can't wait to add the other 1500d and 'glass the enclosure and also run a 100.4 on some CDT's.

Hi, I'm getting a Fi 12" Q and need some help on a ported box. I'll probably go with the recommend tuning of 32hz, but I was wondering what the main differences between 2.0 and 2.5 would be?

after beating my subs for 8 months it appears my spiders got real soft. if i pust the cone its not as stiff as it used to be. so i was wondering. if i recone my subs, how much increase in output will i see. a rough estimate will do. thanks in advance.

its right at about 4 cu.ft if I can add some volume when I actually start fitting I am shooting for 4.2 cu.ft.. Not including the port and speaker displacement. Port 4 3/8" x 11 1/4" x 23" long @ ~32hz The fron is angled so it will fit to the seat area and I can seal the cabin from the trunk. I am going to make a custom seat that has a large rectangle hole cut off out of the center and have it foamed and upholstered to match the lower part of the seat. Thanks foir looking

Hello, I have been thinkging about buying a new sub and one of the members of another forum I visit is always raving about Fi subs so I decided to have a look for myself. I have been trying to read up on the forum and think I have decided on a sub, but I am not too sure about the box. Based on what I have read it seems that a 12" Q is what I am looking for. I want a good sounding sub with the ability to play low and loud. I only really want 1 sub as my trunk space is limited and I'm not trying to win any spl competitions. Basically it will be in my daily driver. Right now I am still in the research stage but have no clue about a box. I don't know if sealed or port…

I am hoping some one can help me design a ported box for a single 12" Q I am going to run it off of a DLS A6, 1200 watts rms x 1 @ 1 ohm the DLS amp only has a subsonic filter fixed at 25 Hz. The dimensions that will fit in the trunk of my 2003 Nissan Altima are: 33" Length x 14" Height x ? Depth is the only variable my front stage consists of DLS UP6 (6.5" components, mid in doors and tweeters in A-pillars) the front stage is bi-amped and ran off of a Tru Technology B-745 ( 100 watts rms x 4) my goal is for the sub to blend well with the front stage and to sound musical and dynamic.

n00b to the forum that is , did this one for a local guy. I'll let the pictures do the talking. It was a little dirty sorry, I had to snap pictures off quick and vaccumed when the guy picked it up. Comments welcome, I've got a few other BTL enclosures I've done I'll toss them up as well otherwise check out my photobucket page HERE

I am curious as to about everything about the Q. I am newer to higher end car audio and will be doing something similar to my friend, who I think is getting 4 15" BTLs. How much SPL would 3 or 4 15" Q's produce? I want something that can cause tons of vibrations, maybe flex, but still sound amazing. not quite sure what to go with yet. Any help would be great. I would like the BTL's, but I think they would take up to much room in the bed of my truck, but I have yet to take solid measurements on how much room I actually will have. I am hoping to take up no more than about 3/4 of the bed, this including amps and extra batteries. Or suck it up and go with the BL or BT…

I wanna do 2 15" subs (read Fi BL's) In the back of an 1990 Formula.........think it can be done without having a sealed box or a wall and still having a backseat?? God I hope so. J

Im designing my box now for my BL 18 and wanted to check something i read in the BL sticky for enclosures. For the ports, you need 12-16 in3 for each 1 ft3 the box is? So this means that the port would have the same volume or bigger than the whole box? Heres my box idea before i read this post, It has a little over 1 ft3 ports due to the aero. http://feat.putfile.com/profilepics/main/6...75120100648.jpg I will post picks of the trunk and the denesions later to see if someone can help with a better design.

OK well, apparently the I didnt have a clean enough cut and the glue didnt hold my 1in thick dowels very well. The bass eventually flexed the fudge out of them. One came off and the other, well snapped... I noticed ever since around that time, the sub hits, but not as hard. Like its loud, but i used to have trouble breathing in or talking. Now I dont. Could the bracing have something to do with this since the box is flexing so much without it? Just a question is all. Didnt plan on replacing it.