Fi Technical

so i've got up to 15 high x 32 wide x 20 deep to build an enclosure for my fi btl 12; it'd be going in the back of my jeep liberty. and im planning on using this sub daily on an alpine m2000 that i just got and the birth sheet says it'll put out 2274 watts, so i'll be playing it at its max. but i also want to start entering the local spl comps and i know the fi site says that 30-35 hz is where it should be and 32 is optimal, but i was wondering what would be the loudest hz for my application? thanks in advance

I have the Beta version of WinISD. I put in the parameters for the 15" Fi BTL from the website and no matter what I do it doesn't work right. I more than likely have one of the parameters wrong. Does anyone else have theres working and would be willing to post a picture or something so I can see what I did wrong?

I just ordered a FI ssd 12 inch subwoofer, a Kicker zx750.1 amp, and 4 ga wire kit. I previously built a 4.0 cu ft box out of 3/4 mdf. I was wondering if the ssd would be alright in this box. Also how long would the port need to be if using 3" dia. pvc pipe so it is tuned to 33 hz? Thanks.

over a year ago i purchased my 2 fi btl n2 15's fully loaded, and because i waited 4 months to get em, i didnt wanna wait to install, so i went to a local shop to have a box built and installed, it was supposed to cost around 500, but ended up being 800 when i left, a few months later i got into a small fender bender and the box fell just fell appart, i took it back for repairs and they said the could do it for 100, so i did it annnnd, nothing was really fixed except they just re positioned it, it has been un hooked after the alternator they sold me died, i and just gave up at that point. recently i have decided to rebuild and everything with the help of my uncle cause i …

i have 2 15"se/xxx's i wanted to know how much power should i throw at them also what do you guys think for a box. im looking for a loud DD. do you think of 9 cubes before sub and port displacment and 135" of port tuned to 35hz's

I have a BL 15 dual 2 ohm wired to 1 ohm. How would I find the resistance? On the specs page it says it is 1.5 ohms, but since I have it wired to 1 ohm would it be different? I am kind of lost as to what my target voltage should be. Sorry I am just starting in the car audio scene so pardon my noob question

Ok guys heres the situation. I ordered a BL 15 with cooling and flat wind dual 2 ohm. I'm building a box myself and having trouble on what to do with the port. The box is planned at 3.76 ft^3 with the woofer displacement added in. Its recommended to have 12-16 sq in of port per cube so i need anywhere from 45-60 sq in of port. I want to just maybe slap a 3x6 aero port or maybe a 4x6 aero port. The 3x6 is 42 sq in and the 4x6 is 75. Both not in the range i need. Also looked on amazon and found precision ports 3 in and a 4 in round. Doesn't say the length on them tho . Reviews say there adjustable somehow. Help would be appreciated. Also wanted some recommendations on ampl…

placed an order this weekend for a 12" BL that will be running off of a hifonics 1606. i've drawn out plans for a box thats 2.33@33hz w/33 sq. in. of port area (haha). will the hifonics be enough to push the sub? i can go bigger on the box to let it use the power a bit more efficiently, but whats your guys' opinions on this? anyone w/experience as to exactly how much power the hifonics is capable of putting out?

Hello everyone, Im looking for some input on new woofers. Looking to do two 12's in 6.5 cubes, ported to 29 hrz.(havnt designed yet) I am stuck between FI Q's and BL's I understand that its not entirely fair to compare specs of subs as there are many variables involved, but how does the BL's motor compare to the Q's? The Q having 28mm of Xmax and the BL having 19mm xmax. Is the BL's motor just much more powerfull? What are the real world diffrences and which one is better for my application? Amp is: 4,000 watts rms(1ohm). they will be wired down to one ohm

I have a 15" BTL fully loaded with 4000 wrms in the back of my jeep cherokee it is in a audio enhancers box right now. It is loud but I believe it could be way louder with the right box can anyone hook me up with some plans? Thanks in advance.

Hi, I'm for sure a newbie, especially when making boxes, I just ordered my first Fi product ever, the 18" SSD, and i'm super excited. Probably to excited to be honest but I have a question about my box. I used RE's box calculator and tried to make it fit perfectly in my vehicle, I wanted the box tuned to 30 hz and I did all that. The thing that I'm worried about is if my sub is going to move to easily and I'll end up damaging my woofer D: The box size is 5.6 cubic feet and tuned to ~30.7Hz. The port is 3" wide and 22.5" tall, and its a slot port. The port area is 67.5 square inches I can give all exact dimensions if needed. Thanks in advance!

so Im trying something new with my truck, I have an ext cab s-10 with a hole in the back...a big one... I can fit 2 12'ss, have about 8 cubes to work with(preferably a little less), and 3000 watts of power. I really want to give fi a try after having some trouble with my previous subs. Im lost as to which to go for the BL SSD or the Q, all seem to be a good choice to me for my application. Im going to go ported for sure, around 35hz. First in foremost i want loud music, It doesnt have to be the most accurate, but i dont want it to sound like a fart iether. So, can you guys help feed my addiction?

Hello all. I have just found out about Fi yesterday. Seems like a solid product. Everywhere I read everyone has positive things to say about them. I am in the market for new audio toys in my truck. Stumbled on this website and thought id ask some of you gurus about some suggestions. Some info for you. I have a 05' Single Cab Dodge Ram 1500. I have taken down some measurements of what the enclosure "could" be up to. I would like if possible a slight wedge box so I can still lean my passenger seat back a little. This is what I came up with. Length of box from side to side = 38" Height of box = 18" Bottom width = 11" Top width = 8" Ive done this calulation on Fosgates box …

hey guys, if i tuned a box to 26.5 hz would it hurt the sub? ik fi recommends 28 but i like it a little lower than it is now. so im gonna build a new box, and tune it to 26.5 if u think it would b ok. ne help would b great. thanx.

what kind of grills are needed for the fi q 15 ? something strong to protect the sub. i have a suv and 2 kids, i don't want to worry about things getting thrown in back. most of the grills i have found don't have enough clearance for the full throw of the cone. looks are not an issue. if i can't find something soon i'm going to start welding my own.

Hi. I Just bought a FiQ12 and am waiting for it to arive. But right now I have a Clarion cz702 hu with focal polyglass 165 vb front speakrs and focal polyglass 165 cvx back speakers and a alpine pdx-f4 amp running the speakers and one memphis mojo 12 and memphis amp in the back. Im replacing the mojo with the fi. When i turn the head unit all the way to max, the speakers clip. I have the amp turned all the way down and the amp in the headunit off. I have the system set to normal right now because i dont understand the 2 way and 3 way set ups options and what all the numbers mean. I dont know what all the corss over numbers are or what i should have running through my spea…

Hey I want amazing SQ. I have a Infiniti G37 coupe & would perfer using 1 sub. I already have a Mmats amp d3500.5 Watts & have me eyes set on a q10 watts @ .5 ohms mono 1 X 2700 Watts @ 1 ohms mono 1 X 1500 Watts @ 2 ohms mono 1 X 800 Signal to Noise Ratio A-Wtd: <85dB Total Harmonic Distortion: 0.3% Mostly I listen to Metal never any rap. So below a kick drum is were I want my F3. Any idea what my volume needs to be? I'm considering running at 1 ohm in the hopes that it will be cleaner &amp…

I recently found out my Tinsel Leads were blown and i'm not sure how to fix it... Is this something i could fix on my own? Or will i need to send it in? If so how much will it cost? and where do i send it in too?

Hey finally making some progress and decided to get the Q instead of BTL which will be here on the 3rd. Just wondering whats a good amp to power it at around 1000w-1500w at a 2ohm load. Also what are some good .5ohm stable amps out there and about how many watts would I be looking at running it at .5 instead of 2ohm Plan on going with around a 3cu ported box tuned at around 32hz to go in a 03 honda civic coupe. (If this information helps)

I just did a re-cone for 2 BL 12's and it seems that the 2 re-cone 12's play harder and have alot more excursion now than the other 2 12's in my enclosure. Is this because they were re-coned or is there another problem? I had all the coils metered yesterday and the 2 re-coned subs coils read lower than the other 2. Would the lowere impedence make them play harder?

Hi, I have had my BTL 12 for several weeks now. Its fully loaded and only receiving around 1000 watts rms (PDX 1.1000). The enclosure is 3 cubes after displacement at 34 hz. On certain notes, i hear a popping noise. The notes are almost always higher notes. The spiders and leads look fine, but i dont have much experience with them. Is it possible that i am reaching the mechanical limits of the sub in this box at less than half power? Amp is not clipping to my knowledge. Voltage is stable when the noise sounds (less than half gain, no bass boost). Oh, and the popping is only heard at half volume plus. The sound sounds like its coming from under the dust cap. Any i…

I just bought 2 10inch BLs and I have a 2600w hifonics amp, what size speaker wire should I run from my amp to the subs? ive been told 8, 10, or 12 AWG and im not sure which to go with... Thanks

Hi to all, this is my first post in this forum I have some question to ask and i hope to get some answers First of all, i have already checked the "SSD Box cut sheets!" topic but the box measures are too big, but also i read the box must be of 6/10 cu.ft So i ask if the following measures are ok for a FI SSD 18" (i want brutal bass, a huge pressure, feel bass hits my head and also get accorded at low frequencies like 30-33) Box: 6.6 cu.ft Box Width = 27.55 inches (70 cm) Box Height = 19.68 inches (50 cm) Box length = 19.68 inches (50 cm) Air Port height = 11.81 inches (30 cm) Air Port width = 3.93 inches(10 cm) Air Port length = 15.74 inches ( 40 cm) I calculated the m…

Is it that hard? How long would it usually take?