Fi Technical

BL Series: Available options and what they do: The BL line is pretty much a lower power alternative to a BTL or a higher power alternative to the Q series of woofers. This is more of a street jamming type woofer that “fills the gap” if you will between these two series of subs. Keep in mind this is what we recommend, this is NOT what you have to do. P Chamfer: This is a chamfer on the end of the pole, it helps to bring the air down around inside of the motor and helps cool the coil better. It also helps relieve the pressure underneath the dustcap. We recommend at the bare minimum to get this option if you choose this series of woofers. Hyper Pole: This is an extended vers…

The BTL line is our flagship woofer. Its whole design is based on and focused on being able to throw tons of power to something in a Bass Race or �Street Jam� situation. Options Available are as follows: P Chamfer: This is a chamfer on the end of the pole, it helps to bring the air down around inside of the motor and helps cool the coil better. It also helps relieve the pressure underneath the dustcap. We recommend at the bare minimum to get this option if you choose this series of woofers. Cooling: Self explanatory, the cooling channels are machined into the inside of the sub to help cool the coil FAR better. But there are some things that you sacrifice. There is less me…

All of the links below will link you directly to our box cut sheet page. Keep in mind these are general boxes for daily driving scenarios. If you are shooting for maximum SPL you are on your own. That only comes from trials and testing. X series cut sheets! SSD series cut sheets! Q series cut sheets! BL series cut sheets! BTL series cut sheets!

Watch the video...explains everything in great detail.

Video format of our options and what they are and do.

New Q Options for 2010! Cooling: The 2010 Q now features a solid pole piece that allows the addition of the Helicool cooling system that will allow an additional 200-500 watts of power handling depending upon install and scenario. Bottom line this option increases thermal power handling capacity over a “Stock” Q. P Chamfer: This is a chamfer on the end of the pole, it helps to bring the air down around inside of the motor and helps cool the coil better. It also helps relieve the pressure underneath the dustcap. Please note if you select “Cooling” this option is included in the cooling package. High QTS: This option is for users who intend on using the new Q series woofers…

SSD Series: Available options and what they do: Flatwound coil (+$20) – The flatwire coil option simply helps the power handling of the sub. The coil has more surface area to dissipate heat and will take more power then the regular round wire coil that comes in the ‘stock’ version of the sub. This option will also make the sub tend to be more prone to ‘peaking’ for a budget daily driving sub where you don’t have to use a ton of power to get maximum output and sacrifice sound quality a little bit. Copper coil (now standard) – The copper coil is a heavier coil and adds mass to the moving assembly. In comparison to the stock coil, or the flatwound coil, this has the smoothe…

can someone please help me out here? i need a box design for TWO 12" Fi Q's!! tuned to about 33 hz. and the dimensions (height) should be able to fit in an 07 altima with limited trunk space or theres no point lol. thanks a mill

Ok I read the options page and I understand it pretty well. My question is I know I need to get one of the cooling options on the sub but which one? The sub will be used for daily. If I go with cooling, the strength of the motor will be reduced but if I g with just teh p/chamfer option, will it be enough to keep things under control? I really don't want to loose any structural integrity inside the motor if I don't have to. And the inner heat sink? I don't quite understand that one what is it for, and do I need it? So the options that I think I need are: p/chamfer, hi xmax coil, daily, universal? Would these options be what Ineed for daily 2k+ rms? thanks

ok here goes we have the box made (except for the ports) it's 19.3 cuft after dis. for subs(3 18 btl fully loaded)and bracing, i still need to make the ports........just to give you guys an idea first i cant make just 1 large slot port would have to be 3 at most (med. size ports)and i would like to tune it around 33-35hz oh and the ports would be facing the same way as the subs it's somewhat of a wall/slant design any help would be highly appricated ............................. thanks ahead of time...........................

Can a BL 15 with flatwind coil, and p. chamfer take 1000 watts or so rms for an hour or so at a time, and 1700 watts rms for spl burps? Or does the sub need the cooling option? In 3 ft3 enclosure tuned to 48hz.

i need a price for an re xxx 15" dual 2 recone. also how much for a 12" recone for it. i need this price hopefully today. i dont want to call scott since he is so busy if at all possible. thanks!!!

so i know that i cant make a flatwind coil option motor match a copper coil but how about a stock ssd match a copper coil one. anyone?

Ok I got 2 18" Qs in a 12 cu. box at 28 hz. I know thats just barely the minimum for them, but thats the most I can go. I was wondering if I switched to a sealed box around 13.6 cu. would be more appropriate for these woofers. I havent heard what a Q sounds like sealed before so I was just some opinions on what you guys think. The box would also have bracing inside, so after displacement it would be around 13 cu. Let me know thanks ps..... the woofers would be facing towards the back

Hey just wondering how (2) FI 12" Q's and (2) kicker 1000.1 will sound in a 3cuft total sealed box will sound? Thanks, John

ok so the set up would be 3 12" BTL's (fully loaded) and 3 sundown 3000d's..I'm lookin for some basic dimensions for an encloser and some places online that can do a quality build.Also,any suggestions on port Fq. would be appreciated..It's gonna be a daily driver in a '96 impala trunk so i have room to play with.Thanks!

i currently have a 1997 mercury mountaineer with 2 q18's. i plan on walling it off behind the second seat with 4 q 18's. heres the problem i run into...the depth from top to bottom of the center of the back is 37.5-38 inches tall. but at the very back where the hatch shuts it drops to about 30 or less inches roughly. how would i go about building a wall with the subs on the same plane and port as well. i wanted to do the port in the middle with a pair of 18's on each side. but how would i get my box in. i want to avoid the pacman style boxes if at all possible. please help thanks. i know there are others out there with their explorers which is the same thing running 4 18'…

Can anyone help me with a link or can someone help me design a tuned enclosere for a single Fi BL 15 with a max height of 17 inches? and a max width 36 inches? my first box for my first system.

I'm planning on a new system in my 1970 oldsmobile cutlass. I wanted it to include 2 btl subs with my. rockford fosgate t4000bd amp. I was wonderng if amlnyone has any sugestions on any aftrmarket alternators. I was also wondering if Im able to just add a second alternator to my car or would that increase the voltage were it would screw up the cars electrical as well as burn up the amp. -Thanx, Jack

Does anyone have a contact number for them?

I am looking to build a slot port box very similar to the threads that are very recent in the forum. My dimensions are slightly different and I want to flare the port walls which will complicate things. My dimensions are: height: 14" width: 30" depth: variable tuning freq: 32 hz box volume: 2.3 cu ft subwoofer: FI Q12 Dual 2 amp: Soundstream PCA1500D Like I said I would like to flare the vent sides by cutting slits in the MDF and bending it. I have made some test bends and they seem to work out pretty well. I have read that adding the flares will require an additional 1-2" of port length. I can add the additional length that is required for the flared p…

hey nick just tryin to see if this was indeed fixable, i got it from david (basebalz13) the magnet is cracked and its seized. i got pics not sure if david showed you or not already. if you want i can upload em.

are there any differences in the 08 and the 09 BL models? i would love to add another 15 but concerned about putting two different subs in the same box, are they any different to the point where you couldnt put them together in the same box?

I have a 08 chevy crew cab I need to build an enclosure to go under the back seat for one Bl 12" 1 ,0hm I am running a T 1000 fosgate amp this will be a daily application I know I will need to raise the backseat a little I plan to raise it 4" but I would like to build an enclosure first the area I will have to work with when the seat has been raised will be best described as a wedge style box 55" wide 16'"high 8"D1 and 11"on D2 with a notch in the middle for the drive line tunnel if anybody can help come up with the die-mentions to build an enclosure for this I would be very grateful and also any recommendations on were and how to port this properly would be he…