Fi Technical

So, i hate to be one of those bums that asks for help on designing a box. (help?? who am i kidding, i need full assistance) I have a Fi BTL 18 just sitting here teasing me while i earn my money for a refurbished SAZ 3000d. i thought as i was waiting, i might as well build the box. Space should not be an issue, i want this box to built for performance. It will be used for daily use. So my question is, what would you do? From my understandings, tuning at 32hz seems to be the mostly desired tuning frequency. Alternator and batteries are all taken care of, just down to the box. SO! if space was not an issue (cause its not! =] ), what would your box design be for a Fi BTL 18 w…

What is the Induct Heat Ring and what is its pros/cons?

I kind of started a post in the wrong area for BTL box questions. But I am looking at getting a 15" BTL sometime soon. I do have somewhat limited trunk space though (40x40x20). I would like maybe a little of extra room in the trunk for putting somethings (ie bags, books, backpacks, skating equipment etc). Can it be done to get the same boom / sound quality with a smaller box? I know on my other post, somebody said it was possible to make a little smaller box with biger ports to even the difference out. But how far can you take it? Like (I know you couldnt but...) making a box that only acted as a brace for the sub and maybe have some sort of diminishing cone around the s…

I am going to be ordering a 10" BL and was wondering which to get? Should I go with the dual 1 or 2 ohm? I plan on running it off the saz-1000d. If I get the 1 ohm, that would bring it down to .35 ohm, but with the rise, shouldn't that bring it back to almost 1 ohm? Just wondering as the amp reports that it is only 1 ohm stable. or would it be better to go with a Mmats 2100.2 and get the 1 ohm and wire them in series? this isn't something I need ASAP, but any ideas would greatly help the process. Or... another option is to go with the dual 1 ohm wired in series and go with the saz-2000d. Ideas?

Hi, can anyone link me to a thread that explains the change in the ~2006 to ~2010 motor that's used for the Q? I bought a Q15 back in 2007 and the motor for my new Q12 looks much different. The old motor has a double-stacked magnet setup. The searches I've done haven't come up with any info on this change.

Hey, This will be my first time buying FI subs and just had a question about what I should buy. I was gonna get two 12" FI BTL's and power them with a Sundown SAZ-3500D amp when it becomes available. Under the amp specs it says: ----RMS power, 2 ohm linkable/dual mono 6000W x 1CH ----RMS power, 1 ohm mono 3500W x 1CH I'm confused as to what the difference is would I be able to get 6000W to the two subs if i got the 2ohm versions? or should I get 1ohm? If I can only get 1ohm will 3500 be enough for two of those subs or would that be very underpowered? Any recommendations on the box size and port size would be greatly appreciated as I will have it made by someone. I'm …

i've sent a couple of emails but have gotten no reply so i figured i'd just make a thread about it. I'm going to need a recone for a loaded universal btl 12. also i've heard a little bit about tinsel slap problems. If subsonics are kept under control is it really a problem? Any possible performance difference between the d2 vs d1, amplification held aside? If not then d1 is my preference.

Is 5ft^3 net to much for a BL 15 running on 1200wrms?? My plan is to make a box with an 8" or 10" PVC aero port. If Im correct... 1. With 5ft^3 net and an 8" port would give me 10 in^2 of port area per ft^3 box area. 10 in^2 seems to low... 2. With 5ft^3 net and a 10" port that would give me 15.7 in^2 per ft^3 box area. 3. But FI recomends running 4ft^3 box and with an 8" port that would give me 12.5 in^2 per ft^3 box area. If I tune my box at 32hz which option would work the best for daily use on all types of music?? Any help would be aewsome.

Hi, I found another thread where FI can recone a 3hp to a 18" for me, I found the price. I'm just curious as to what soft parts would be used to recone(as in what lines it would come from) or what parts in general(how many spiders etc, stiffness.) And do you beleive that the reconed 3hp would be good for 2500rms daily?? thanks, Joe I need the end load to be 2 ohm..so either 4 ohm dvc, or 1 ohm dvc.

Hello all. my enclosure will be finished soon.. like i haven't a lot of space in my CLK trunk,i have made a 3.6 cu ft @ 33hz box(after port and diplacement... 55 square for the port area). So do you think it's good for daily? (no SPL competitions)... low will be good? good SQ ? value for the subsonic? I have ordered my amp, a "little" Digital Designs Z1 this beast give 4000-4500w/1ohm at 12v.. my new batt is a NSB90(enough for the Z1) give me your ideas,pronostics i'll be back with a video soooooonnnnnnnnnn... ps:Scott,like you have told me,i have dropped my car ....2inch with the total weight

DO SSD 15 WORK SEALED I HAVE2 AND I WANT 2 GO SEALED HAS ANYONE TRIED THEM IN A SEALED ENCLOSURE YET? WHAT WOULD BE A GOOD AMP FOR THE PAIR

Does any1 have a 12" Q in a sealed around 1 cubic feet? I want to know if the q will get loud in a sealed. Im thinking of replacing my 2 JL 10W7 with 1 12" Q or maybe I should just power 1 JL 10w7. The 2 w7s take up my whole trunk and i just want to get some of my trunk back. I have enough to put a Q in a sealed enclosure but have around 1.5-1.7 cubic feet for ported. My amp does around 800-900 watts at 4 ohms or 1600watts at 1 ohms so dual 2 ohms it is. Should I just keep 1 of my jl 10w7 and port it? Will that sound close to a 12 Q sealed?

i need to order a recone and basket for my MT motor..and ive heard statements on both sides of my question. does the BTL coil fit in the MT gap?

Allright i got my btl in and the dustcap got hot really fast and i mean hot hot i have 8ga wire running to the speaker and 1/0 ga ran to my optima back to my kinetik 2400 and ran it full tilt and this happend its a duel 1 fully loaded and it is in series to make it a 2 ohm load the amp is a Rockford Fosgate t2500.1bd everything seems to be fine i mean i have not "Broken" it in yet..need some help does it matter which terminal i use to run series?

Soon im doing a blowthrough in my 97' single cab s10. I need an opinion on an amp to go with the 18" Fi car audio btl. I was thinking of the rockford fosgate t20001bd. I have no idea what amp and how to wire it right to get the right power to the sub. With that amp i would wire it at 1 ohm. is that the best way to go. I know if i wire it up at 4ohm i need alot bigger amp... any suggustions.

Well yeh just like the title says i need some tinsels for a d1 Fully loaded BTL. I emailed a few days ago and but never got a reply. How much would they be shipped to 33027 Fl by sunday if possible

I was just wondering if you guys could make a dual 1 or .7 recone for a 05 XXX?

Please tell me this is a warranty issue...? It happened last night noticed one sub quit, kind of looks like the wire was to short, there are no rips in the speaker just a broke wire? this is a Q 10.

Guys finally going to start building an enclosure for my Q 15. My plan is to do something like this: http://i161.photobucket.com/albums/t203/wy...enclosure-1.jpg I am aiming for 3.5 cu. ft net after port displacement with port tuning of 30-33hz (does that makes much difference musically??). My question is: 1. What is the recommended port are for the Q15? I want to make the port as big as possible for more air to move out of the port. 2. Has anyone ever modelled the Q15 in WinISD as everytime I tried to key in the value either I will get some errors or different t/s value. I dont know whether my box will yield linear response. 3. Has anyone (expecially Scott or Nick) can …

What size and how many aeroports should I use? I'm thinking 3x6" ports for ~85sqin? Is this about right?

How much does the slug only, on the new BTL weigh? Also, how is the top plate and t-yoke manufactured? Is it milled, molded, cast?

which of the old 3 slug options were cosidered basically universal, D1 or D2. i bought my btl from teampsi on ca.com, on his ad he said its a D1 so its basically universal. i have read else where that the D2 were the ones considered universal. can anyone clear this up? im about to order a recone, and i want D2's but i want to make sure it will fit! thanks fellas

hey guys im deciding on what to get in my setup but i was wondering about the Audioque AQ2200D i was thinking of running two of these with 2 FI BL 15s. on the audioque site it says if your not careful you might burn a coil or fold a cone ... i know the FI subs are tough but how do you think they will go. Thanks

So I unrapped my new toys today and put them in. But I want to make sure that I don't need to remove this bolt covering the pole. I'm thinking it's just there for shipping so nothing gets in, but no book = no idea. Great looking sub, and I'm happy. Perhaps someone could save the Fi guys some time and make up a generic 2 page book or something. You know like people always like to ask "where's the mounting holes" and now I'm asking about the allen bolt. etc. etc.

I was driving around and all of a sudden my btl quit. I have tried to rewire it using just one voic coil and noluck it wont even turn on... Any idea?