Fi Technical

i just ordered two fi btl 18s fully loaded like two days ago and have been researching all about them great subs is what ive been hearing, but im going to build my own ported box for them and have tryed using the t/s parameters listed on fi's website and i plug them in my bass box pro 6 and my winiSD and the programs basically end up saying that fi's t/s parameters are incorrect, because after ive typed in all listed parameters it says recommend internal size 5.25 cu. ft for two of the 18's i dont know whats wrong... and what do you guys think would be best box design and port design for 2 btl 18 fully loaded dual 2 ohms, 4 hifonics brz 1700.1D amps (amp per voice coil) (…

I just picked up a 15" SSD and everything else for my system other than the box itself. I have got no idea on the tuning frequencies and port sizes. Can someone help me out. Ive got about 30W X 18H X 116L room in the back of my truck. Would a prefab box sound okay? Thanks in advance

Hey guys! as of a few hours ago, i ordered a 15" BL and a Sundown SAZ-1000d amp! I was just wondering how you guys think this will sound! and suggestions on my box. I want to make it ported offcourse

need help with making a ported box for the 18 btl i've measure the trunk space in the lincoln ls Height = 14.5 inches Depth = 24inches width = 40 inches also i will be using 3/4 inch mdf so i just need to know how much i need to cut when i head out to home depot or lowes and what size to cut for the port also what size screw should i use for the box? and material i should use. this is my first box so be easy on me.

how many decibals are you you guys hitting with your Fi BTL 18"

Currently have a 12" BTL (D2, loaded, daily) powered by 2500D. Box is 2.5cuft @ 32Hz (after displacement). External dimensions 27" x 18" x 16". Port is 14.5" x 2.5" x 40"? (forget, used subwoofertool.com few years back) Would like to get a bit more out of the lows. They hit good as it is now, even down to 25Hz, but they could probably be better. Just wondering what I would need to do to make another box that specializes in the bottom end more. Smaller box? Larger port?..etc. Was thinking, maybe 28-30Hz tune? Maximum dimensions: 31" x 18" x 16"

Ik that the Fi BTL is 2000 RMS and 4000 watt peak butt ive been reading some topics and some ppl are saying that the 4000 watt amp will be to power full and could ruin the cone

Ok so here's the deal. This is my wall design for my two 18in. fully loaded btls that will be running 3000rms a piece. I have never done a wall build before so I'm hoping i somewhat got it. EVERYTHING is double baffled 3/4in. mdf . In the 1st picture showing the front plate it looks double baffled its only supposed to be single " which i just fixed and im to lazy to take and upload another picture" due to the fact that there will be another front vanity plate to go around the curves in the car all nice and snugly. The box is , 15.7341 ft³ BEFORE DISPLACEMENT 15.2141 ft* after sub displacement displacement port is 6 inches in height width is 29.224 in…

So I'm in need of a box for my Bl 15 in my scion tc.. I was going to get one built and shipped to me but it will take too long. Went to my local shop today, and they had one box for a 15". He said it was around 3.2 cubes which i guess is ok. Asked him what its tuned to and he didnt have a clue, said around 44 or something, which i would think is too high for the BL as i was shooting for 33hz. The box is carpeted, and higher up on the end where the sub goes in. Has two small ports in the sides. Price is $180. What im wondering is if the tuning really matters, and if it will sound like shit if i use this box?

Looking at building sub box for BL 18 also considering possibly running 2 BL 18s and wondering minimum cu ft for both in the one box ported box-- is L=3' W=2' H= 1.5' i did the calculation right im sure but just wanna double check thatll be enough cu ft hey Thanks

I am planning on building a 4ft^3 for my BL 15. I was just wandering what size my slot port should be (Length, height and depth) if i want it tuned to 33hertz?

I am a noob set on getting 2 15" BTLs but I don't know if i should run them at 2 ohms or 1 ohm. The problem is that there are not many amps that support 2000 watts unless at 1 ohm. If there are any suggestions for an amp with adjustable subsonic filter, that can run @ 32hz+, for 2 15" 2000 watt rms subs, PLEASe let me know. Thanks

Just wondering what wiring i should use for FI BTL 15 or 18 power ground etc Thanks

what is the speaker wire gauge for a Fi BTL?

Well my computer crashed and I lost the t/s specs I had saved into win isd for my older model 15 inch Fi Q dual 2. I am throwing around new enclosure ideas but the specs for the new Fi Q's seem a bit different. When I use the specs for the 2010 Q it suggest a ported enclosure where as the older one always suggested sealed. I am sure the specs are reasonably close but just the same I would like to get the t/s specs for the older fi q 15" d2 model if at all possible. If anybody could help me out it would be greatly appreciated.

I am set on getting 2 15" BTLs, but I am trying to get some help from you guys on who makes really good enclosures. btw im obviously a noob

I need to recone my BL and was wanting to know if I can recone it to BTL using the double stacked magnet kit.

hey guys .. im looking at building my own enclosure for my BTL 18" and was wondering whats the minimum cubic feet as i have a limited area to work with Thanks

after reading tons of reviews and watching a ton of vids on you tube my 8 month journey has brought me to fi tomorrow im ordering 2 15'' q's..i will be sending around 2000-2500 watts in total..now i need some help please guys..id like some suggestions on what size box to go for both sealed and ported..because im not building my own box im having a shop do it for me so i cant just try a few boxes i dont have the funds to do that..90% of the music will be rap and the other 10% will be a mix of all other kinds of music..going 15's i obviously want it loud but id like it to be musical..have sq to them..im not just looking to sound like a fart canon or anything..i hope this in…

Hi all. I'm about to order a btl 15 d2 with cooling, I heat ring, and high Xmax coil. I have a hifonics bxi2010d. I came up with this box design, but I want to make sure I haven't overlooked anything important. Will I get port noise or any other bad stuff? Its for the trunk of a 97 ford thunderbird. With the current design I have, the box would be lying with the port and the sub facing up toward the rear deck. I could change the dimensions slightly, any comments or suggestions would be appreciated. EDIT: link to image was broken

I was wondering what would be the best enclosure to make these subs get super loud, but not lose very much SQ? the max dimensions i can use are 58" (W) x 31" (H) x 38" (L), But that's max ( i don't plan on making a box that big unless that's what will be the best. Can you please give some dimensions or an estimate, and also what you think would be the best frequency to tune it to? thank you

Ok i wanna take a go at the blow throu deal. Can anyon help me ? I need tips. Do i make my port the blow throu part or just make the box and set port infront of it. Wat are some ways to make the box weather proof. How should i make the blow throu on the bottom or standing up? Thanks

Just wanted to know what peoples thoughts are on the aq1200d amp.. how are they? will they hit hard with the 15" BL ? i heard their rms output is unnderated. but listed at 1200RMS at 1 ohm

I am about to buy a FI btl and i was wondering if someone could give me good measurements of a enclosure with 10 cubes of space and is tuned to 32 Hz(s). If you need any more details please replay

* Rated RMS Power = 200 watts * Mounting Depth = 4.25" * Outside Dia. w/gasket = 8 5/16" .........(inside the lip is 8 1/8") * Inside Dia. 7.000" * Sealed Box: 0.280 ft^3 w/ F3 of 50 Hz (Qtc = 0.707) * Ported Box: 0.60 ft^3 tuned to 30 Hz F3 of 25 Hz * MSRP - $99 T/S S4 **: RMS: 200 Re = 3.37 ohms (4 ohm nominal) Fs = 34.9 hz Qes = 0.5323 Qms = 6.93 Qts = 0.4943 Vas = 7.6 L BL = 13.3 N/A Mms = 127.7 grams Cms = 162 um/N Xmax = 12mm one-way linear (70% BL method) I made an album with measurements of anything I could think of that you may need to know in order to find/build a recone kit for these... I'll need maybe 12-14 of these. thankyou!~!!…