Fi Technical

Will tuning to 35hz be good for daily driving? Alot of people say that tuning is a little to high for a btl. What do you think?

Can it be sealed and sound just as good ported?

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.

I just ordered my dual 2-ohm Fi Q15 last night and will be ordering the Cadence iA7 today. I was hoping that one of you would be able to point me in a good direction as to where I should buy an enclosure for this, or where I could have one built. I plan on going sealed, is there an ideal size besides just 2-2.6 cubes? Any other suggestions? Thanks guys

I'm trying to figure out the port diameter and length for a box I'm going to build, but every time I use a formula from the internet I get something that doesn't seem reasonable. The box is for a Fi SSD 15. I figured the dimensions are 25x15.5x17 which is 3.81 ft cubed. I'd like the port tuned to 33hz. If anyone could help me out it would be greatly appreciated. And if you could leave the formula for future reference that would also be appreciated....thanks

I saw NDMStang65s post and how he hit pretty good numbers with a single 18" BTL and a hifonics bxi2008d. I'm getting a set-up like this and I was hoping ( talking mostly to NDMStang65) If you could hook me up with a good box design to let the BTL get loud Thanks! Cody

Ok so i have a FI BL 15 Fully loaded powered by a Sundown SAZ-1500d. Ok so anyway when i play some music loud i hear some weird sound like the sub it bottoming out but i know its not becuase its not moving enough to bottom out.

I have a 12'' Q with Bp and its powered by a hifonics 1208d. I was wondering if the amount of cubes made it sound different. I know it does but how much. I wanted to go with a 2.5^3 tuned to 32 hz. The only problem with this is idk if i will have the space. So would 2 cubes sound any different and how?

Ok so how do i wire my speaker wires from my box terminal to my amp just - - and ++ this is for 1 ohm

I want to buy 2 Fi BTL 18'' with 4000 to 5000 rms each. they will be in a 2006 ford F-150 in a "blow through" i still dont have any amps, i normally listen to music with low notes. some guy told me that if i order a sub with 5k i could not play it for more than 30 sec cause it would burn. would that be true. how much would a sub run of this type?

I have 1 15 BTL Fully loaded, i was playing it today and it started smoking then went out. I have it on a Orion Hcca 5000, the gain was not up it was below half way, i wasn't playing it for a long time, i don't know what could be the problem. If you have any ideas what the problem could be, or what I could do please let me know, Thank You.

preordered 3500d. now ordering subs i want bass,sq is a plus but i want more spl. i am going a sealed enclosure in a lexus gs400 i dont know the cu/ft. what would be better 3 fi q 12 or 4 ssd 12. and are the q the same displacement as the ssd, because then i could maybe do 4 instead of 3. then i would know the answer to my question. the 3 q would be dual 2 ohm at 1.34 ohms and the 4 ssd dual 2 ohm woulds get down to 1 ohm. plus it's hard to decide because i dont know the final rms of the amp.

What have you found to be a "sweet spot" for your 12" Q??! i'm running a SAE 1000D to it at 1 ohm. with BP option. i'm looking for both sealed and ported enclosure sweet spots. share your views here. by sweet spot i'm talking about where it makes you jizz when you hear it. come on don't hold back. i want it to be loud, but clean and tight, just like our women!.. well with the exception of the loudness, thats no good with the ladies lets hear it!

im going to be buying a single 12" BL within the next week but i wanted to get started on building the box. its going to be powered by a hifonics bxi 1606d. i mostly listen to rap. i got these measurements set up. let me know what u guys think. as far as going bigger i really, cant limited by trunk space. its going in a 02 lancer. W: 36" H: 15.5" D: 15.5" Port Length: 3" total port length: 27" tuned at 32.8hz.

Alright, vehicle is a 99' infiniti i30, 4 door sedan, I have two 15" Q's on a crunch 3000d-pro. The enclosure is 7.2 cuft after port, and displacement, tuned to 32.5hz. It gets pretty loud, but kind of a empty not real full sounding bass. The enclosure is built into the trunk with the woofers mounted invertedly, so that the magnets are pointed toward the back of the backseat. the port is firing out of the top of the box through a hole in the rear deck. It sounds like there is a lot of cancellation, and when I open the trunk and crank the system it sounds way better and hits the lows way better. I understand this is some sort of phase issue I believe, and have had o…

would a BL 15 be alright all the way up to 5 cubes of air space? i know fi recommends 4 for optimal, but im just curious if it still sounds how its supposed to up to 5 cubes.

i have a FI bl 15,cooling,daily, universal d1, im (thinking of) adding another bl to my car (not like i really need it ) but is there i could wire 2 d1's down to 1 ohm?( wouldnt it end up at 1/4 of an ohm? or 4 ohms) i don't think you can but, hey theres always hope(or none) but i was thinking about getting an excessive amperage alt like a 250 amp, run 0g wire front to back add a kinetik battery all KnuKonceptz wire, with maybe a crunch or hifonics amp Ideas or comments?

Will a 3.1 cuft enclosure (after all displacement) tuned to 38 hz work for a 15" Fi Q? With the size of my truck, this is the largest box that i could fit in there. How will this work?

OKay so i got my car back... 15" Q in a (supposed to be) 4 cu.ft. ported box.... i love it so far and sounds great. i need to listen to it more tommorw. i hardly had any time today. but anyways, to the point... My box is 4 cu. ft. which means the port should be 48-64 square inches.... well i have 4 3" ports which is: 1.5^2 x 3.1415 x 4 = 28.2735 if the box is 4 cu ft and i replace the 3" ported with 4" ports, that would give me about 50 (50.264) square inches but how much would it take from the rest of the box? how would it change the sound and output? and how hard would it be to change the ports out? I think it may be restricting the sub a lil with such lil port area...…

I'm looking for the best box designs for this kinda of subwoofer? I want sealed because I want clean cut bass and me and my buddy are going be building the box tomorrow and sealed is the easiest build for right know till summer time. So any one have the best box desgin for Fi 10 Q sealed and test on it or pictures would be great. thanks lata

I have an 12'' Fi Q coming soon and i needed a box and i dont have time to do one myself so i went to the local audio shop to ask him what would be the best option. The owner actually held the loudest street car for two years in a row fyi....but I drive an f150 and i have a spilt rear seat. I wanted to take out the smaller section and have the box in that area so it wouldnt take up room for my passengers. His plans for my box is to have the sub face the floor of my truck as well as the port facing the floor. It will eventually exit out the side (meaning the port). He says that it will have the right cubes and hz. He says that when the sub faces down, it will shorten the …

Hi All, So I've had my two 12" SSDs in a sealed box, 1 cu ft chamber for each sub, for almost a year now hooked up to a Sundown 1500D. It seems like I don't get the lows like I would expect and I'd like it to be a little louder. Do you think it would help to build a ported box for these guys to see if I can squeak anything else out of them, or is it possible that these subs just don't fit my wants? Thanks.

Alright well im going to be getting 2 18" FI BTL's reconed(The older version) and was wondering what kinds of new options I can get like diff dustcap or diff tinsels stuff like.....that Id want carbon fiber if posssible and also what are the prices on diff options...any tips on packing for shipping?

Dimensions: 41" Wide 33" length 36" heright 2000 explorer. Looking for deep loud bass. Any suggestions would be great.

Right now I'm in the middle of my build with 2 18" BL's with a Trutech Hammer H1 per sub in a 16cuft wall tuned to 30hz. After this I'm pondering changing to two BTL 18's with a DDZ1. Just wondering would it be worth it in terms of being a major leap over the BL's and the Hammers ?