Fi Technical

Ugh i just bought a box form a audio store and its a 1.75 cuft and and im sure if i want to use it. Would it be ok to use it tell i find out how to build my own box?

thinking about running a second battery in the trunk. i was told there are two ways of doing this. 1, using a isolator and 2, running the + from the front battery all the way to the second battery and then ground out the negitive. are these both true? what should i do?

This is my first time to mount a sub (have to learn sometime, eh?), so bare with me. The screw holes, when i look through them, i see the foam/rubber that extends from the surround. If i stretch the circle with the screw holes, i can barely get past the outer rim of the basket; making it impossible to screw the opposite side in. SO my question is, how exactly do i screw (or bolt, undecided) the thing in? I know to pilot/predrill my holes, its just i dont know how to safely do it.

I ordered 2 15" fi btl subs I also already have 2 rf t40001bd amps.. I was curious if everyone thinks I should just use one of the amps for both subs (each amp would have its own sub) or if 1 amp should be enough for both subs.. Any help is much appreciated

ok i curently own a hifonics 5000 watt... i have owned it 4 months... 1 month it sat in my spare bedroom. and for 3 months it has been at CIA engineering.. waiting to get fixed.. i got to play it for about 30 seconds before it popped...... so far i see this hifonics as being a very very unstable amp... im a daily driver bass head, should i keep the hifonics... or sell it and get TWO jl 1000/1's one for each sub i have 2 fully loaded fi bl's 3 yellow tops. all 0 gauge wire, 200 amp alt. nc2 deck and any advice would be helpfull thank you!

what is the formula to determine how much longer a port needs to be with kerfs? i intend to have 1 3" kerf on top and a 2.5" kerf on the port bend. anyone have any links? thanks.

Im wondering if anyone has some suggestions .. i know in the thread it mentions (after all displacements for those wondering). (I personally think that 1.2-1.3 cubic feet is optimal imo) but thats after displacements and i have no idea of the subs guts size. i am awaiting delivery of my sub so wanted to have the box ready. Thanks in advance

How do these dimensions look for my Fi Q12 d1 Box outside diameter after using 3/4" MDF: Box: 33.5 x 14.5 x 12 Port: 1.5 x 13 x 16.5 This should give me 2.53 ft3 (before taking away sub/port displacement) and be tuned to ~32 Hz. I have been using website like the12volt.com and a couple others. I tried the RE enclosure app, but I think it is a little off. Not too sure. I appreciate any help! If this box looks off, what would be better? Thanks.

Hi everyone on SSA and Fi audio, i am new to this forum. I herd lots of good things about Fi audio, so iv decided to give there woofer a try. i plan on ordering one in a few weeks. im thinking im gonna get me a single 15" BL to start Fully loaded as a daily with 2ohm and universal option. Now my question is i need plans for an enclosure and also what should it be tuned to?..... I never tuned a box myself so i may need some step by step if its a complicated design. Thanks

I see that the mounting depth on the 15" BTL is 8.25"; so Im assuming the mounting depth with the 3rd mag would be a inch more @ 9.25"? Would 1/2" between the back of the woofer and the enclosure be enough to let the sub vent? Cuz 1/2" is all I can do

I ordered my btl a few days ago (fully loaded) and now it's time to buy an amp, what do you guys think of soundstream? The sub will be going in a 5 cuft pored box tuned to 32 hz Not trying to spend more than 500

Im building an enclosure for 2 12 BLs with 2500w RMS and I want to put a window in the back, Im not sure what the best material to use is, Ive heard different things but it seems my two options are 3/4inch Plexiglass or 1/2inch Lexan... Which is better?

So I just ordered an Fi Q 12" a few days ago. I only got the cooling option, didn't think the others would really be necessary. I also ordered an Audioque AQ1200D to push it. Only thing I still haven't made up my mind about is the enclosure. I do have limited trunk space, the recommended Q 12" ported box in the cut sheets thread will fit my trunk exactly with no room to spare. Sealed would be fine, but I really want to go ported. The car is an 09 GTI. Music would mostly be drum n bass, dubstep, other electronic music, basically a mix of lows and highs. I could either go sealed or a smaller ported box. I just want the clarity and crispiness along with being able to be hear…

I have a BL 15 dual 2 ohm wired to 1 ohm. How would I find the resistance? On the specs page it says it is 1.5 ohms, but since I have it wired to 1 ohm would it be different? I am kind of lost as to what my target voltage should be. Sorry I am just starting in the car audio scene so pardon my noob question

i have 2 15"se/xxx's i wanted to know how much power should i throw at them also what do you guys think for a box. im looking for a loud DD. do you think of 9 cubes before sub and port displacment and 135" of port tuned to 35hz's

I just ordered a FI ssd 12 inch subwoofer, a Kicker zx750.1 amp, and 4 ga wire kit. I previously built a 4.0 cu ft box out of 3/4 mdf. I was wondering if the ssd would be alright in this box. Also how long would the port need to be if using 3" dia. pvc pipe so it is tuned to 33 hz? Thanks.

ok so I have an old style 18" BTL w/ pchamf, hixmax coil, and 3rd mag.. i want to upgrade and have 2 18" BTLs but as you know they do not offer those options any more and Fi will not make me one with those options, already spoke to them.. if I buy a new style BTL with the newer motor and put it in the same box with my current BTL would that be ok? how will it sound if any one has done it ? and will i damage my sub? Thanks to everyone in advance, ****ty situation i really dont wanna have to sell this one and buy 2 new ones..

so Im trying something new with my truck, I have an ext cab s-10 with a hole in the back...a big one... I can fit 2 12'ss, have about 8 cubes to work with(preferably a little less), and 3000 watts of power. I really want to give fi a try after having some trouble with my previous subs. Im lost as to which to go for the BL SSD or the Q, all seem to be a good choice to me for my application. Im going to go ported for sure, around 35hz. First in foremost i want loud music, It doesnt have to be the most accurate, but i dont want it to sound like a fart iether. So, can you guys help feed my addiction?

Does the 15" BL need to be in a 4cf enclosure to work well or can it be used in the smallest recommended enclosure which is 3cf without sacrificing anything?

Hello all. I have just found out about Fi yesterday. Seems like a solid product. Everywhere I read everyone has positive things to say about them. I am in the market for new audio toys in my truck. Stumbled on this website and thought id ask some of you gurus about some suggestions. Some info for you. I have a 05' Single Cab Dodge Ram 1500. I have taken down some measurements of what the enclosure "could" be up to. I would like if possible a slight wedge box so I can still lean my passenger seat back a little. This is what I came up with. Length of box from side to side = 38" Height of box = 18" Bottom width = 11" Top width = 8" Ive done this calulation on Fosgates box …

I have a 15" BTL fully loaded with 4000 wrms in the back of my jeep cherokee it is in a audio enhancers box right now. It is loud but I believe it could be way louder with the right box can anyone hook me up with some plans? Thanks in advance.

hi all. i have a bl 12 at dual 2 hooked up to a kicker 1500zx mono amp. its all hooked up correctly yet when i turn my car on the amp goes straight to protection. any thoughts on why it might be doing this? the only two problems i can think of is that my inline is a few volts low of the requierments, or the fact that i have 4 gauge wire and might need 0 gauge? the volts from the battery are only short by about .5 volts. any input or advice would be well appreciated!!!

Needing a basket, as the title shows. I was wondering if you two could hook me up with something for an experiment that a friend and I are looking to undertake. I need a basket that will bolt to any of the listed motors, we have a few right now, there's a Treo SSX 534 ounce, 12" motor with a 3" coil, and a Treo 582 ounce 18" motor with a 4" coil, then we have 2 RF power series motors that are old school- like the HX2's that have 4'' coils, and we have an Orion HCCA motor with a 3'' coil. Was hoping maybe I could get an 18" or a 22" basket to play with? Let me know if you guys can help me! Got any parts for the 22" lineup machined yet? I would be happy to test some of the…

6 cubic foot ported box in the back of my 01 Jeep...Wondering about the size of my port and anything else that could help me. And also I was thinking about having a few circular ports...? Thanks for any help.

hey guys, this is my first post lol but i have been a member for a bit. so i just got a 18" Fi Q and just built the box to 6.3 cubic feet after port and sub displacement. i have the port tuned to 31.4 hz. it sounds amazing especially in my little ass car lol fits in the trunk just perfect. i have it double baffled and it doesnt rattle or leak any air. i am running hifonics 1600 watt rms amp, turned a little over half way up, and have 0 gauge wire. stock alternator and battery. big three upgrade. i have 2 questions tho. my first question is...there is no gain setting on my amp...idk where to set the gain bc there is no knob. if somebody could give me some help with that it…