Fi Technical

I have experience with a ported 12" BTL (2500RMS amp) last year. and a ported 12" BL (1500RMS amp) before that. Figured I'd save up a do 2x15" Q's with options in a sealed enclosure. Would a 2500RMS amp be enough, or would they require more power than that since the drivers will be fighting vacuum? Recommended size per sub is 2.0-2.6sqft. Goal is to slam the lows, should I aim for a smaller or larger enclosure. Also, what's recommended for dual drivers, separate or shared internal space?

does flat wind coil and bp power add to a 12" ssd? how about bp power on a 12" Q? just thinking about future upgrades. thanks.

I currently have a Q12 in a 1.35 sealed enclosure powered by a Cadence TXA-1000d. It sounds really good right now, but I cant help but think this sub can handle a couple hundo more watts on a constant basis. Am I right that it can handle more or is it just wishful thinkin?

I was plan of buying 4 Fi BL series 15's. I needed to know how much RMS wattage could the speakers really take. I am going with the flatwind voicecoil, with the cooling option, and the daily driver. I already have an amp in mind that puts out 4kw. If the speakers can take a little more I will looking into maybe a 5kw amp. I do plan to use a bass processor in line with the amp. I am open to any suggestions.

If I were to order 3/4 MDF boards from Home Depot. How much should I get? I want to get a LITTLE more then I should get, but not an overload of it. This is for a 20H x 25W x 20D box that will hold a 15" BTL. Thanks, -Curt

Is it ok to feed a single BTL 12" with 3000wrms daily? any issues you think I may encounter? thanks!

i need some help on how to set my amp to my new FI BL 15... its 1500 rms amp... i know to turn my bass boost all the way down, and to set my subsonic filter 2 or 3 seeting below my box tuning. but. im still pretty much oblivious to the settings for my new sub... can somone help me out with some opinions? would be very helpful.

Hey team well i got a deal cheap on a btl fl , and usps dropped and part of the basket broke. Can it be replaced?is it hard? Will fi car audio sell the basket alone?

Thinking about switching up from my 15 BTL to 2 Qs 15... Would I see any huge difference in loudness... I mean the BTL is god awful loud but I'm always wondering. Trying to figure how to fit everything back there the two dekas, 2 1500ds and a 100.4. Thinkin 7 cubes @ 30 hz.

i have four btl 18s. is it safe to try to drill the terminals to make them just a little bit wider? i cant fit a full piece of 8 gauge into one terminal, i have to trim it just a little bit. and trying to fit two 8 gauge wires into one terminal i might as well just use 12 or 14 gauge because i have to trim the 8 gauge down so much its ridiculous. how bout taking either a unibit/varibit/stepbit (call it what u want), or a slightly bigger drill bit and try to make them bigger? extremely bad idea and i'm gonna end up needing to replace something because i'll break something? or be very careful and go slow and it will work? 2000 rms u would think u could fit a big ass wire …

well i noticed yesterday when i was listening to late night tip that my sub bottoms out on one of the bass lines... how might i go about fixing this ?? i got a 15Q powered by an hk401sx

Has the title states, how do I get a 1 ohm load with 2 btls? My first previous subs where dual4 so I wired them in parallel. Do I need dual1 ohm? If so how do I wire them? Thanks.

hey guys I'm looking to get to BL12 but wanna hit 150db or more. Any advice on enclosures AND what sort of amp or power do i need to accomplish my goal? my purpose is all out sol here to get a high score with 1 single 12" sub!

just got my bl in and i was just wondering if there were anyway you could tell if they built it with cooling, hyperpole etc. 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!!

i should be getting a 18 btl any day now so i built a box for it i have somewhere around 6 to 7 cubic feet not including the ports iam wondering how to get the box tuned at 32 to 35 hertz is it the cubic feet for which the box is made or is it from the amp and cd deck ?? any help would be usefull thanks yall

i have designed a 7 cft enclosure for an 18 btl. the volume is with woofer displacement. how do i calculate a port to 30 hz then? is this ok?: 4,72" * 19,69" * 29,92"

I got two 15 inch BLs and I would just like to know how to tune the enclosure port to 33 hz? Is there some sort of program that could show me how?

I was told I can wire this in series to achieve 2ohms. But when I looked up a diagram for the wiring, it didn't make any sense. can someonen post a link of a good diagram? The amp is rated at 1200 watts @2ohms. rms. I figured this would be a perfect match for the Q. Thanks for the help.

How would i wire this my friend told me to get the dual 1 ohm and he knows what he's talkin about but the amp is rated at 1000 rms @ 2 ohms. Can someone tell me how to wire this

I have 2 D2 18inch Btl's and 2 SAZ 3000ds I need to know how to wire the subs down 2 ohm, because i'm strapping the amps together.

Hello all my box is finished,carpeted ,tuned at 33hz... what is the best tune for my subsonic filter? my ampi is a DD Z1 thanks a lot

I am thinking about putting an FI Q 15 in a 2 cubic foot sealed box. I think that this size is on the bottom as far as recommended. Does anyone know how well the FI Q performs when it comes to small boxes like this?

I am thinking about putting an FI Q 15 in a 2 cubic foot sealed box. I think that this size is on the bottom as far as recommended. Does anyone know how well the FI Q performs when it comes to small boxes like this?

Okay, so i messed up a little. I have a hifonics bxi2601d amp, and i wanted to wire my sub to 1ohm. I ordered a 12" fi BTL fully loaded dual 1ohm model... OOPS! anyways, i tried to change the order, we'll see how that works. If i am stuck with the 1ohm model, and i wire my sub to 2ohms, meaning it will get the rated 1700w rms, (probabaly 1200-1500 actually) do you think it'll sound under powered? I'm running 0/1 gauge wires, and my box is 2.73^3. Stock alt and battery for now. My goal is to sound better than a jl 13w7, my buddy said hes hitting 143db on the reader. you think Ill get him?