Fi Technical

hi i'm interested in a pair of 18" btl's and i'm curious how much efficiency is lost by choosing the "daily" option and the "universal" option , these sub are going to be used in a streetmax truck but I may want to bass race occasionaly. I think i'm looking at dual 2 ohm,pole chamfer,thirdslug,hi xmax coil,daily, and universal for the build options on them how much would recones be so I could stock them so when i blow one i can just recone it and order a replacement instead of missing a show waiting on the UPS guy. Thanks for your time Charlie

Fella's, I was wondering would it be better to fire my 12" BL's forward in my SUV or to the rear towards the tailgate? I cant fire them up so its either forward or backwards? Thanks in advance.

can anyone explain what each acronym or letter means and what option/s it represents? thanks guys.

What would be an excellent recone epoxy that I can get from Lowe's or Home Depot that would be good to reconing 3-12" FI SSD's???

will the 3500d be enough for 2 btl?

How risky is it? I searched this forum and the web, and did not find this specific instance of question. I would be wiring it to 2 ohms (1200rms). Had I known bass would get this addictive, I would have got a BTL off the bat!!

I bought a ford supercrew yesterday..... about 3 weeks ago i bought 2 fi q 10s, i saw that it didnt require to much airspace for a ported. i went to a local box builder who makes awesome boxes and he laughed in my face when i told him ported is .6-1.2 well he said his not building and so im trying to get a plan b..... i found a site that has a 2.5 seat lift http://www.supercrewsound.com/commerce/pro...21&catId=52 and they make a sealed box that is .95 perside http://www.supercrewsound.com/commerce/pro...23&catId=58 i need some input if possible would this be good seat lift and the box sealed? r is there a way i can get this box and make it ported, that would be…

Well my mojos are starting to suck...blew a coil actually. And now its time to upgrade to BTLs I'm stuck between 2 15s or 2 18s Here is the scenario: The ports will be outside the box. I am going to use these ports... Deal Breaker for 15s: the only practical option is to use 1 of those ports for 8 cubes Fi recommends 12 - 16 square inches of port per cube 8cuft x 12 = 96 8cuft x 16 = 144 So about 96-144 sq inches recommended. that port is only 70 sq in. Would that be a problem? Deal Breaker for 18s: The only problem for the 18s (using 2 of these ports) is that the box would simply be too long to conventionally mount the ports outside the box... So to still be able to …

I'm currently a college student majoring in Electrical Engineering. A few years back, I competed in roughly about two MECA competitions as a hobby. The experience was great, but short lived. With my new schedule, I'm able to juggle classes and a job. With that said, I've decided to go back into competing so that I can have something "fun" to do outside of studying hard during the week. I'm specifically looking to compete for SPL in MECA. What I buy from Fi will strictly be based off of the new point system for MECA. There are several classes, and I'd either like to compete in either Street 1 or Street 2. Street 3 is simply above my budget as a current college student. The…

So we finished the other box (the first pic) now i wanna play with a t-line. I've drawn one up on sketch up tell me what you think.

I am just trying to find the T/S parameters for the heat ring option. I am wanting to add it to lower inductance but wanted to know what the new inductance would be. Secondly I will be putting 3500watts to a pair of Q 15's and dont believe I would need any extra cooling options. I will add the chamfering option but being on a tight budget I will probably skip the Bp/cooling option and just go with the standard Q. I also wanted to know what the Mechanical Xmax is? I only plan on using these to Xmax and less but I do like to know all parameters of my speakers before pushing them. Thanks for any help from anyone.

someone on another forum posted about more thiele parameters then wats on the site says he wants to know everything plus motor strenth can yu guys help out

I am getting 2 12" Fi X in a trade and want to know the t/s specs there are none on the website. All I know about them is they are 300w rms and D4. I thought to myself they were perfect for HT. Wire them series parallel and final load of 4 ohms, BASH500 does 500w @ 4 ohms. So, I just need to know some specs so I can figure out what kinda box to put them in. I want to put them in a tline since space isn't really an issue Thank you for your help.

Any chance I could get approximate T/S Specs for my re-coned subwoofers? The hybrids consist of Memphis 15-MOJO15Q1 (15" Quad 1 Ohm Voice Coils) mated to Fi D2 soft-parts with older style tinsel leads. I purchased these already assembled from a friend but he didn't have any specs on them at all. Any help would be greatly appreciated. Thanks, Charlie Buffalo

Hey I tried doing a search...I kept getting an error anyone know the specs on a TC7 motor?? I am probably going to buy one because of a good deal on it. What size coil does it fit?? Will a standard 12 spoke basket fit it???

I have an oppertunity to pick up a pair of TC9 Motors for cheap. Can these be made into subs by Fi? Looking for 10" subs. As well, what is the power rating on these motors?

Hey I was talking to Scott about reconing my tc9. he said he could, but i think he has been busy lately so i'll post this here lol. I have the address still from and earlier recone i sent in, can i just send the sub in with a little note stating what i want with my contact info?? or would there be something else that i need??

I have a guy waning to buy my SP4 so im considering an upgrade. the low end bass of the 29hz box has grown on me and i want it louder. my thought was to keep my 8.2 cubic box that i have my SP4 in and use that for a Team 18. I currently run a single KX2500.1 (2005 model) for my SP4. I was thinking of setting it up with a second KX2500.1 and buying a dual 2 ohm T18. then running 1 amp per coil, throwing my factory alt back into my truck and bracketing my mechman next to it. taking my 3 AGM G49's and isolating them along with the mechman into a dedicated power plant for the stereo and letting my factory alt handle my normal vehicle needs with a couple cheap lead acid batter…

Hey guys, I was running down some information to do a build for a buddy this weekend. He's looking to do a modest setup with 4-500 watts of power to the sub stage and would like to go with a pair of 10's. I showed him the 10" X's which he was very interested in after listening to my Q's he's quite impressed with Fi. One thing I noticed both here on the forum and on the website is that there's no Tech specs for that line. It's easy enough to post up here or send an email asking about the optimum tuning, enclosure size, etc. which we'd like to know, but I figured I'd just go ahead and ask when you might be expecting to have something up on that information? Also, I thi…

is there a phone # I can reach someone at Fi to help me with a few questions about a box? Does anyone know?

I was wondering to expand my knowledge and thought others here would benefit from my ever growing thirst for knowledge... i thought i would ask to help myself avoid these problems and also help educate those that aren't aware of these issues and how to avoid and/or discover the following problems.. Anyways.... as it pertains to sub woofers (particularly Fi built ones since i own some) 1. What is mechanical failure? 2. What are signs of mechanical failure (sight, sound, smell)? 3. What are the most common reasons for a sub to experience mechanical failure ? 4. What is thermal issues/problems in regards to sub woofers 5. What are signs of Thermal problems/issues (sight, so…

I was told by other members of this forum to email Fi about this topic, which i did, but I have not got a reply and it's been about a month since i sent the message. Any chance Fi still has recones for D4 X 12's? Or should I invest in an Ascendant Assain? Also, its just the leads. I've replaced the leads on one of my D4 X's already so i know i could do it, but i cut through the cone getting the dustcap off. Maybe I could ship the sub to Fi to get it repaired since they deal with things like this all the time? I'm just exploring my options! Since it's been so long without my sub, I am willing to repair it myself again. All I will need is four leads and a dustcap. Depe…

I have two Fi X 12's and the tensil leads slap really bad. I have about 450watts on each.. i know the RMS is 300 watts.. but the sub is still putting out clean sound other than the leads... i noticed that the tensil's aren't aligned with the pad on the back of the cone. if i were to relocate the pads do you think this would solve the problem? THANKS

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...

Like the title says, i was wondering whether the terminals on the FI subs can fit 8g wire or if ill need to go with 12