Fi Technical

I looked at the voice coil on one and there were markings. What does FC FW mean? Plus how will I know if it has the cooling option I ordered?

ok i order a 15" fi btl fully loaded with a dual 2 ohm. i have been researching a lil bit and im confused.... i will be using a sundown audio saz2000d for this sub how do i wire the subto my amp ??? should i have order it dual 1 ohm?? im confused///

i want to build a 4th order bp for 2 18 btl and im pretty unsure about how to calculate the port. the sealed chamber is 2* 3,3 cft and the ported one 1* 10 cft. how do i design the port? does 40 hz work well or is that too low? shall i make the port for 5 cft @ 40 hz and then double port area (because both woofers will play in one ported chamber)?

If anyone could draw me up some designs for 1 15" bl send me a MSG and I'll give u measurements of my trunk. Website says 3-5 cubic foot.. So shuld I go 3 4 or 5? Wuld it fck with the sub if I went bigger or smaller then reccomended? I was lookin at sme pro boxes and this one is 3.87 Cft. Any1 reccomend pro boxes or would I be better off gettin one made?

So would I be better off gettin an Ssd or bl? I'm jus getin one fifteen and I'm not lookin for sound quality jus wanna shake houses and go deaf and also I hav a Pontiac grand am.. Wuld the subs be better firing up.. In the cab? As of now they are facing outside(ATM I have 2 12" inch kicker cvrs powerd by 1000 watt kenwood in a pretty big ported box takes up most of my trunk)

would a tline work for my bl 10 ive always wanted to try one

ok i have a box thats Height22.75 X Widht14.5 X 32.75Depth... i have a 15"fi btl wich calls for 12-16sq inches per cuft... i think i have around 3.5cubes in my box. port size would be 3.5x13 = 45.5sqinches now... i want to tune it to 32-34hz... how long should my port be ?? 26.5 inches long??? also all these number look rigth to you guys ??? i know the box its on the samll side but thats the biggest i could fit on my truck... please help me

I believe I will be running this amp at 1ohm to my dual 2 ohm sub. Will this sub handle what is said to be 1500w RMS from the SAZ (which I have heard is under rated)? I am not planning to pin the gain or anything, I just do not want to blow the sub.

Hello again hey everyone i am trying to built my box for 2 18" fully loaded dual 2ohm btl's...I am either running 2 md-3d amps (us amps ) 2000rms at 1ohm or hifonics brutus amp (not sure model number) it does 2000rms @1ohm ...and i want to have the box @ 5cu per side tuned at 32hrzt that seems to be a good spot for daily ground pounder but not sure about port size the box is going in a 99 yukon so room isnt a issue...please help thanks agian

i just planned to put my 18 btl in a 6th order bandpass (60 hz / 30 hz tuning) and i already got the wood sawed too. ive never tried a bp yet so i thought it would be nice to give it a chance. what do you think? is it better to put the btl in a big ported box or go with the 6 th order. i currently have a 5 cft ported box @ 30 hz but i want to increase efficiency and loudness of the box. amp is a bxi 2610.

I bought a used 18" ssd from a buddy.. I sorta wanted to due a sealed box with it but I was told you need the copper coil option to be able to due a sealed box.. I just didnt know if there was any way to tell. Any help appreciated alot

Ok, well i had no idea about tuning or anything when i made my first box. its 9.5 cubic ft with 90 in of port area, and i ran the port length till about the back of the box. ( pics soon). what i was wondering is can anyone provide me with the actual formula for calculating my port length. ( so i can just plug in hz volume and port area? ive got some calculators but like to see everything out. here is what im trying to accomplish by just cutting the box. 34 hz tuning 7.5 cubic ft 90in squared of port area if i my box in a 01 grand am running from my trunk to my back seat, with the btl right in the back seat and the port under it. if i put the port in the trunk would it mak…

My buddy is trying to put a 18" fi ssd fully loaded in the back of his eagle summit van.. He has about 1200 watt rms of power to run the sub.. There is two different set of max dimensions we can use ( it all depends on how tall the box will actually be. The first set is a tall narrow box and our max dimensions are 27 1/4 tall X 39 wide X 15 Deep. And the other set is 20 1/2 deep X 39 wide X 21 tall. Any help would be wonderful... Would really like start build on box as soon as we can.. Also I would like it ported wit a tune right around 32 hz. And I not sure wat would sound best wit the speaker direction and port direction so any advice is wonderful.

Im in the process of having a box built for my tahoe for a 18" BTL. my boxes dont always come out the way i want so i decided to have this one made by someone who knows what they are doin.. well me being the kind of person i am.. ill bring the info i have from him to you guys and hope to get some support or get me in the right direction. Guy is fully aware of the BTL's and has made several boxes for them in the past. He says he would like to make it 8.5 cubes tuned to 30-35hz and says he will give it a little bit more port area than Fi recommends... does this sound ok to you guys? anyone have something similar or done anything similar. I know here in the fi forums its say…

So here the deal i just came up on two 12 inch D2 Fi Qs. What to do? i have a 3 cube net box i have that i made to fit under my seat in my truck. ported@35 Im just using the Q or Qs untill my SA-8 come in from sundown I have good electrical and will be run off a SAZ-1500d. The question is should i run 1 Q ported in my box at 1 OHM or seal my port and run both at .5 or 2 OHMS. Im looking for loudest. I know Qs arent for LOUD applications, but this system is temperary just to hold me over.

I was just wondering, if when adding a port to your box do I minus the width of port and then I'll have my true area of space the actual woofers will be in?

Hi First, Im glad to be part of this community. Ive been reading a couple of threads and I can tell there is a lot of people who know what they are talking about (from what I know). I recently joined a couple of forums but none of them were really helpful. I hope you guys can help me out!. So Im saving up for a FULL (all options and cooling) 18" BTL. From what I been reading, it looks like I will definitely need at least 2000watts RMS amplifier and an extra battery. Just to know, will the BTL run without an extra battery? In other words, with just the stock? Thats the sub. Now, for the amplifier, I was thinking about the Hifonics BXi 2010D. However, I just found out a lot…

So i had 2 of these sealed and decided on going one ported. I had the other in my room for about a month, before selling it to my brother. He got through with the enclosure built, and put the sub in but there was no sound. Its a dual 1 ohm so it is wired to 2 ohms (triple checked it). When we hook up either side, the sub will play, but when wired to 2 ohms there is no sound. Tried the sub in another car and the exact same thing happens. Any suggestions on what is going on?

I'm going atleast a 7cuft box tuned to somewhat 30-35hzt range. I'm building my own box and the subs aren't here yet. According to UPS the subs weigh in at 54lbs each. I'm simply asking if i should double baffle the box?

I have a 15 inch q with bp already, and I need a second one. Just wondering if the parameters will still be close enough that they can share an enclosure and be alright. The new and the old.

If I have a traditional trunk (large 300c trunk) and I fire the sub towards the back but fire the port up on the passenger side of the car, does the direction of the port make any difference, up, back side? I assume it would a little if there was resistance from say a seatback or side trim but up into the rear window or towards the empty trunk in the back, will there be much of a difference in the cabin as far as sound etc... Just got my 15 BL today ($105 extra for DELIVERY WTF?!) and can't wait to get it in... I am going to tune it to 33 or 34 hz PS: How reliable is the ported box calculator at reaudio?

So I finally had finished my box, got my amp and my subs came, I was just waiting for the opportunity to install I got it all hooked up and no sound... After some trouble shooting- I hooked up an old amp and speaker to make sure all my power stuff was ok and my head unit was providing signal and so my old amp and speaker worked fine... So I replaced the amp thinking that was the problem and I am still having the same issue... So either there is a problem with my two BLs, a wiring issue, or an amp settings issue... Heres the specs on my system I hope you guys can shed some light on my situation... Thanks 2 10 in FiBL 1 Ohm DVC Hifonics BXI 2608D Kenwood DNX 5120 Headunit S…

I want to make an SPL system so I`m asking what option should I set and this sub is good for spl. Sorry for my english I`m from Bulgaria.

These questions may have been answered before but a quick search did not turn up the obvious answers. I have 2 completely separate and very specific applications I'm looking at for 12" drivers (neither of which involve being inside a vehicle BTW) and I need a little bit more information to help in the decision making process. What is the motor OD on the Q series and the BTL (11.5" I think?) What is the overall depth of the 12" version of the Q and BTL? Also what is the motor only depth of both from the back of the frame? What is the generic xmech of both series? It's nearly the same I assume as baskets, vc od and suspensions are very similar. I figure about 35-36mm inwa…

i have 2 18btls but only one can fit in my car with a ported box. actually i want to sell one btl but in case i dont find a customer who buys it for a reasonable price, can i put both btls in a sealed box? as the other btl would just lay around losing price. i know fi doesnt recommend that. and i know i will lose alot of spl. but how would the sq change?