Fi Technical

Could one of you check my port length for me? 4 cubes @ 32Hz with 2.75" wide x 20.5" tall port is what I'm aiming for. I used an online calculator and it said the port needed to be 29.5" long... but someone else told me it needed to be like 36.5"? Thanks a lot

the actual diameter of the BL 18? need to see how im going to have to design my box

Hello all Long story short. My friend told me to check out FI Audio. I surfed through the FI forums for days and have concluded that the SSD or Q line sub woofers will do everything I need. There are several extra options for each series. I ask you experts, what do you think is best for my application. Ohm load on the amps and cuft of the box are limiting factors. Amps: Two RF 500m's (if you are not familiar with the watts RMS or ohm configurations of these amps ask...I will explain them) Ohms limitations: min 2ohm mono load per amp or min 4ohm load in a bridge mono configuration using both amps. Box Space Ideal limit: 4cuft total or less Open options: speaker siz…

Well my 1 18in fi bl mag cracked. Dont ask me how lets just say that i am very sad that this happen. And another bad thing that happen is one of the voice coils went bad in it to. I took one of the subs out of the box cuz i heard alot of buzzing. Then saw that the top magnet of the motor was split in half. I dont know why this would happen but it went from me bumpin super hard to only bumping a little with one sub. So if anyone has a BL motor please let me know or give me some info on how i can get it replaced thanks.

so, i got an enclosure built for my 12" BTL (single slug motor) but the magnet refuses to fit into the cutout. i was wondering what the cutout diameter would make it fit. i can't trim the cutout because its only enough for the cutout itself since the box is 14"H with only .25" clearance on the top and bottom.

I have two fi bl tens and I can't figure out which recone to get? What is the difference between the 2008 and 2009 model?

Ok, since i've got the new amplifier, I was looking into the bl's a little and keep seeing all these posts about them missing out on the low end, (ie sub 35 hz). Is this true? My enclosure is tuned to 27hz at 8.18 cu ft and the Q's perform awesome in it. I want to go with the BL's because they will handle a little more power than the Q's because I'll be running a IA 40.1. How do you guys think they will perform in that enclosure tuned to those specs? If they won't handle the bottom end like the Q's, I am also looking at the AA Havocs, and I've read that they handle the low bass frequencies pretty well like he q's. Feel free to chime in with any responces. thanks

Question What is the highest and lowest tuning that you all know of for the differnet series of the Fi lineup? AA would also be considered. Personally I would be most concerened with 18s and 15s I currently have 1 15" BTL dual mag in 3.8CF and tuned to 35hz Many people including myself (surprise) are really impressed by the output of this sub/enclosure combo I however have realised that (to know surprise) the cabinet is not capable of playing the lowest notes. Really needing more airspace for lower simpler tuning abilities, the box is great for "most people" and say a "rocker" type listener. Now since I myself am a rocker, Staind, Linkin Park, Korn, come to mind mo…

Did the guys at Fi re-evalutate the SP4 and change the RMS from 2500 to 3000 watts, or did they redesign it to increase RMS?

hey i was just wondering what would be a good amp to run 2 18 in BTL off of for my 2002 chevy avalanche and does anyone know if everything necessary will fit? right now i have 2 12 in alpines back there.

I was wondering if any one knows the true RMS rating for the Earthquake PHD5000, Kicker 1200.1, Massive audio P3000.1, AUTOTEK MM4000D, MA AUDIO HK802SX, Orion 2100, and Hifonics bxi2006d or Hifonics bxi1606d? I am just trying to figure out witch amps to go with when I run my stereo. If any has tested any of these amps please let me know. Also I would like to know if any one has ran one 12" BTL daily in a trunked car and had it metered to music? If so please post your scores on here along with pics of your installs or your car getting the score. Once I get mine I will let you know what it does with a bunch of different amps. Hopefully I will have it posted on here by next…

Hi, have my new car since a few days now, a 08 BMW 330xd :bigclap: :bigclap: :bigclap: But this time i just want a lil boombox in the panel of my trunk. I just ordered a 10 inch Fi SSD Dual 2 Ohms today and expect it by the end of the week... I wanna put it in a sealed enclosured like this finished looks like this I measured about 0.5-0.6 cu ft What you think, will this work fine?? And it gets about 900 RMS

Should the ports be on the same side as sub is on or not? I want my BTL's to fire up and the ports to fire up to. Does it matter where the port is on the box? Would it hit harder with the subs and port towards the back of my excursion? Thanks...

Ok here is the email I sent to Fi. Just thought Id post it here while I wait for their reply cause they r so busy. I bought an 18" BTL a while ago and need some recommendations on the type of enclosure I should use. First I went to my local shop to see what kind of designs they could offer me and what they thought would work best for my application. I talked to the guy that specializes in enclosures and unfortunately he hasn't heard of Fi before. So I gave him the web addy to get the parameters of the sub so he could plug the numbers into the enclosure software they have. But, the bad thing was, it couldn't calculate the specs for whatever reason. At that point we started…

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

So, here is my problem. I am going to be running one sub and I have a slight "Monk" issue...for those of you who know that show. I feel like things have to be balanced out. So, I want to put my sub in the middle of the enclosure and would like to have two ports, one on each side. Is this clausable and how do I go about figuring out how much port area I need. The specs say 12-16 sq inches of port per cu ft of box volume. So I am planning around 40 sq inches of port area total. Would this be 20sq in per port or am I calculating this incorrectly. Any and all help would be happily listened to. Thanks

Recently Purchases a 10" SSD Fully loaded, Dual 2 Ohms, Standard QTS. The amp is a Kicker ZX1500:1 at 4 Ohms. Just curious as to if anyone here has ran an SSD in a T Line and if so what advice do you have as far as box size etc etc. ,Ethan

Hey guys! I was wondering what any of you with a Q 18 set your crossover or lpf to? Also what type of crossover? Right now I have BW and LR filters to choose from, 6, 12, 18, or 24db/octave and 12 and 24db/octave, respectively. A simple frequency recommendation would be great though, hehe. I have tried many values from 70 to 180Hz but can't really decide. Are there any tests I could do to help me decide? Right now I have it at 127Hz 24dB LR which seems to be fine but I still feel indecisive. Thanks!

I am new to car audio and need some help with what i would need for a subs as powerful as the BTL's. I heard you need a charging system for your amp to keep up with it, but im not sure what that is. Also what kind of amp would i need for, lets say 2 15" BTL's

i bought a mt motor a few weeks ago and ups damaged it....the pole has shifted to one side........can you fix this? or is it a 53 pound paper weight?

Is this possible I can't really find the tech specs of the two anymore so im not sure if there are any size differences between the two

i have an 04 honda accord sedan which im going to put a Fi Audio 15" Q Sealed Box sorry i dont have trunk dimensions... what do you guys think will i have any problems? Design me a box! anyone pleaz

i got a 15 btl FL dual 1 ohm i need a good amp or amps no more then 350 dollars i have 1 sae 1200 on it now but my buddy is going to buy it so i can get something bigger any ideas???????

I know people are going to say it depends on my application, but what would be a good starting net volume for a box for a single Team 15. Running on a DC 5K with 2 XS batteries and a Northstar 170ft. Do these subs like bigger enclosures? I will be slamming it daily but also doing some SPL. I'd like to tune it around 33hz. Thanks in advance.

Like title says........what is the recomended port area for an X 10? It will be in .75cuft using aero port...............I'm thinking I read a 2.5" was enough once just need confirmation.