Fi Technical

Just wondering... Does the Hixm coil has better efficiency in comparison with the standard BTL coil?What are the pros and cons when using the first in SPL /power handling/output? Is there any signifficant difference in the subs sensitivity? A few days i have watched some tests on some new quad stacked motor subs and i wondered if it would make any difference if the coils were put a little higher than they originaly ought to be put (like 4-5 windings were out of the motor top instead of putting all the coil in the magnet gap)

So I'll be running my SSA Zcon 12" on 3k for now until I get around to purchasing a recone for an sp4 motor I got in a trade. My problem is..I have a trunk car and limitations on box sizes. Depth and height are a problem for me. I have come to the conclusion that the biggest I can fit is an L port enclosure about 3.9-4 cubes. If I give it about 4 inches of port and still have net, will this enclosure server well to the sp4? I'll be running 3k @ the sp4. If not recommend what you all have experimented with.

I just designed my box and came and up with 12.37 sq inches of port per cube is that a little low? What does more sq inches of port per cube do? I also came up with about 4.03 cubes per sub before displacment I want to do a little larger what does everyone I think? My dimensions I used are 23width x 34height x 49 length. they will be in an 05 f150 with two kicker zx1500. 1 amps powering them for now will upgrade power. I know they give generall recomendations of 3-5 cubes per sub and 12-16 sq inches of port per cube. What is everyone else running? and what should I tune to? I did 27 hz my amps lowest is 25 hz and the way I understood what fi said was 2 above your amps lo…

I know that posted t/s paremeters on ficaraudio.com are for the stock BTL with no options. would it be possible to get the t/s params for the common fully loaded BTL built for daily music? Just curious to see how it changes, and I know you guys will always say stick to recommended box design, but it would still help me to have the t/s params.

just finished reconing my 18" BTL a few days ago.. been breaking it in at low volume.. after i thought it was broken in, i turned it up slowly and as i started getting to about 1/4-3/8s level of where i would normally play at my sub makes some what of a clicking noise to the sound of the bass, kinda sounds like plastic on plastic nocking/rattling.. any ideas from any one here as to what it could be ? havent pulled the sub out of the box yet to check anything, dont want to if i dont have to..

hey guys i just ordered my FI BTL and since i know they are swamped with orders im in no hurry to build a box. i would rather take my time and do it rite. i just need some suggestions on how big to make it and maybe a design. measurements for my vehicle are 44.5x17.25x33 and its going in a 2006 king ranch expedition. its an 18'' btl and i would like to tune the box to 32 htz oh and i have a hifonics bxi2610d and am ordering a DC power HO alt i have 2 yellowtops with lots and lots of 0guage if i left any info out let me know, still kinda new to the forum

I have an older RE HC 15 with the 4 spoke basket dual 2 ohm version and need a re cone kit for it, it final blew about 2 weeks ago. I have been trying to to contact Fi via email with no response. Was wondering if anyone knew which recone kit on their web site is the correct one and will fit on the HC motor and wanted to get it upgrade if possible and add a need basket as well? Can anyone help me ?

Hello Guys/Gals, I was wondering if cold weather will damage a sub? Do I need to keep it down till warmer weather, or can i just let them wang? I live in northern Indiana and its currently in the teens here, so stuff gets brittle... Any help would be appreciated. Thanks.

hey guys so i bought 2 15 bls last month and have installed them in a 9.5 cubic ft box with 102 sq inch port and have 2 amps at 1150 rms each going to them. for the first week it pound ed ma were i oculdnt even swallow. then just yesterday i brought it to a shop to get it db tested and hit a 150.9 with eas apparently says the guy. but i noticed after that the ext day t wasnt as loud to me or hit the notes as deep. did something happen to the subs or is it just my ears and body getting used to it. plus i dnt know wut to smell for or here? i know this sounds stupid but i dont want to do damage. replys would be greatly appreaciated!!

ive spent about 4 hours trying to figure out how ohms work. i feel like im the only one that gets confused on this subject. apparently is simple. someone help. im going to get a btl 18 inch but im not sure if i need to get a dual 1 or dual 2. i want to run a Hifonics amp thats at least 2000w. but if someone could tell me what the ohms have to be on the amp for me to get. or if someone could suggest a Hifonics amp for me. that would be greatly appreciated. on another subject...... what are some decent quality speakers that go with this? (6.5 inch speakers) or just tell me some good companies to buy from

hi i wanna buld a new box for my bl15 i have my 15 bl in a 3.25 cuft box right now, my question is if i make a biger box lets say 5 cuft after port and sub displacement would it get louder thant what i got??? i wanna know if its realy worth it building a biger box.

what is a good rule of thumb for box bracing?

well like i stated on someone elses thread, my tinsel lead broke and i really felt the woofer didn't sound the same anymore. i was just looking at it and noticed that the surround is starting to crack around where it meets the cone. and i also need a terminal which i broke a long time ago. my question's.... do i order the recone an do it myself? never done it, so i'm kinda wanting to try it. do i send it back to fi and have them do it? i built a box for another guy in hawaii that has a btl and was wondering if they could do my tinsels like his? or, do i buy a new woofer, because shipping back and forth might be kinda pricey? any and all suggestions welcome and …

alright im going to be ordering a 12 Fi fully loaded..and i plan on running around 1500rms at 1ohm. do you think i need to upgrade my electrical system. i have a ford f150 with a 130 amp alt...what do yall think???

Ok so I have an Fi BTL. And my car is a hyundai tiburon. The sub is 15 inches. Right now it is in a box i built for my old 15 inch type R. The box is not made of MDF it is made of particle board. The box is 2.83 cubes and it is tuned to about 34hz. I am Building a new box tonight which will be made out of mdf, dimensions will be height=16.5 width=36 depth=15.5 with a 3 inch port and tned to 34hz. it will give me 3.56cubes. Do you think I will notice an actual differnce in sound from this?

im currently in the process of building my system using the said products in the Title.. my question are, will this amp be good if not perfect for the 18" BTL fully loaded? is the amp stable at 1 ohm? ive seen the specs of this amp but im kinda confused cause it was only CEA certified at 2000wrms @ 2ohms. i'll be adding a Kinetik HC2400 battery using a 90 amp stock alt and a regular battery? do you think my electricals can handle my system? and lastly, im gonna jail the sub with a 5cu.ft. (net) enclosure tuned at around 30 to 33Hz. will this planned system work? oh and btw, is that amp even good enough to work with in the first place?

I have emailed the address available on the site and havent received a reply. I need the specs for the new 18" btl fully loaded.

So im about to build my first ported box and i need a little help. My 15" bl will be getting 2000 watts and has cooling and flatwind options. This will be going into a 96 infiniti i30 (same as maxima) My goal is to have the best LSQ setup as possible leaning more towards spl. I think i want to tune ~35. If the box is 4 cubes with the tuning at 35, is a port size of 4W x 13h x 21.8L correct? Is that enough port area? And is that a good tuning for my goal? Also if i use 2 circular ports that are 4" in diameter and 10.5 inches long would that be enough port area and the right tuning? Thanks a lot -Rick

Currently I'm using the 9 cube @ 32hz after displacement feeding it about 1.1kw rms and it sounds pretty good but I was wondering would I gain anything from going with a smaller box (7.7 @ 35hz~). IE: would I feel the bass a bit more? would it bit any louder? The only real thing I know about having such a huge box tuned at 32hz is the lows it will pound, other than that I'm a noob when it comes to the dif sizes... Fi GURUS, once again I need your help!

Sooo, I am now in the process of designing my box for a single 10" sub down firing in a ported enclosure. I got the rough idea for the design from those AudioFire boxes for trucks. The sub will be down firing right behind the center console, the main box will go up to right above the rear seat from the ground, the port would then go from the box to the back of the seat and do a 90 degree and back towards the front seat. So, the port is going to be pretty much external from the main portion of the box....my question is, how do I go about figuring out the tuning frequency of this port? It is going to be a fairly thin port but pretty long and I am just not to sure. At th…

I was wondering what the best type of glue is to recone my Fi BL??

how much would be to get a recone for a re xxx18 d2

i was playing my fi q 12 with bp power on a zx1500.1 in a 4th order bandpass bout 3.5 cubes all together and it was sounding good and knockin nicely when all the sudden it stopped no pop smell or anything. . i took the sub out an everything looks fawless but i tested the sub with a battery and a dmm and the ohm reading is all wierd i was just wondering if i can have this fixed or what ill send it in if i have to i just want my sub back. . . . Please help. Thanks, Teddy

Alright im not realy sure about this so ill ask it here. I ordered 2 18in D2 Single stack recones with highxmax coils but there not flatwound. Is my order wrong? im under the assumption that these should be flatwound for better power handling and cooling.