Fi Technical

ok so i got two fi btl n3 12s i went it had it metered on music did 149.3 on music on kick panel and 148.6 on windshield on music they said subs peaks in my box around 33 to 37 hertz which they said is good for low bass is that pretty loud score for that low of hertz? i also have a sunroof that leaks air and roof that shakes like crazy some people say it can hurt the dbs to dynamat or gain so what do u all think

I want to build a sub for home theater, using 2 Q15s in one sealed cabinet. What modifications can Fi make to optimize the Q15s for home use? I'll need a complete listing (including Le inductance) of the modified T/S specs for my modelling. Ideally, I would want the drivers to be optimized for a sealed cabinet volume between 4 and 7 cubic feet. Thanks.

Gday all I am running two FI Q 12" D2's in a daily driver with a box that was built for it by a local car audio installer using a single round port. Sounds reasonable but no where near as loud as I expected from these speakers. I am driving them with a Hifonics 2k rms amp Boot mounted Optima inline with another optima under the hood. Also have a 2.5 Frd Cap. This is a boot mount install in a Aussie car Called a XR6 Family sized four door sedan.. ATM I have the speakers behind the back seat pointing into the car and the port facing the same way. Metered this setup at 132.5 before i upgraded the batteries seen alot better scores out of single speaker setups with similar siz…

I have a 12 " bl and I am about to begin building a new box for it. I want to use the same cut outs posted on here but I want to make the box with the sub facing up and the port facing the back door on my jeep. Does anyone know how to modify the cut out given to make it this way or do I need to make a whole new design?

Hi everyone, I had an amp putting out 2100 watts at 1 ohm on my SP4 18" (Stereo is currently out of the car for the Canadian winter) and I had a couple questions. This is my first build with a large woofer. I set the gain on the amp using my oscilloscope when I had hooked everything up, and I think it might just be my inexperience with this amount of bass, and I don't really know what I should be listening for. The excursion of the woofer is really high and I think I just have no reference point on what should be happening (coming from two 10" woofers on my first build). I don't think it is possible to over power the woofer with this amplifier, and I'm not getting a disto…

I'm in need of the T/S specs for a 15" BTL (2008 Single Slug) They're not on the website. Building a new box for them and I need to have the specs to plug into my software. Thanks

I have my wood and screws and im getting some wood glue do i need anything else?

what size of wires do ppl use for the 12" ssd?

i'm powering 2 Fi Bl 12's. i would run one amp per sub. these amps run 1550 RMS at 2 Ohms. does Clarion make good amps? would you recommend these? budget is also a key factor. and i can get these amps incredibly cheap. i'd run Rockford if i could. but i cant afford it.

enclosure is exactly 1.9 cubes after displacement of the BL and the port tuned to 35 power is gonna be a rockford t10001bd going for a decent daily spl oriented standard cab and thats the max box size with my knees almost int he dash(i drive like that anyway short legs lol) the website says 1.8-2.5 ported

I think I'm gonna add another sub soonish and am hunting for an amp. My budget will be around $150 and was thinking 500 watts total. I'm going sealed. I have ~160 watts on this one now and it gets loud which is why I was gonna add another with a little more power each. Or would I be better off just getting a bigger amp on the one I have. My budget may go up some just depends on the amp. Definitely not over $200. I have 4ga wire running and will need to put an amp on fronts. I have a 4 channel now running entire system. My car is a 2011 Honda civic systems in Sig. If I'm a noob and you have questions just ask

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?

So I just bought my new car, a toyota celica, and I am going to have a custom box built for my q 18. with a kicker zx750, how many cubic feet should I go for? I am looking for a flat frequency responce and a good balance of sq and spl. I know these are all really rough terms but I just could use some advice.

what is the recommended port area for ssd's? box will be around 5 cubes tuned to around 33hz. 1 port 5" wide 20.75" long would give me 75 square inches. and 4.5" wide 17.25" long is 67.5. is one better that the other? and y? also just curious how much does a 12" SSD weigh and a 12" Q?

Ok, I have an older BTL18 that was originally a D1 (written on the pole) and its in need of a recone. The owner got ahold of a D2 BTL18 kit, and I got the basket cleaned up and ready. It an older non-woven tinsel kit. But, I have it a snag...the D2 coils OD is noticeably larger than the D1. I have the kit shimmed and in the gap, but is this kit going to work??? Or will the coil hit the top plate when playing? Its a tight fit, but does have some space. Anyone make the D1 to D2 switch? Please reply soon...the owner is in need of a sub.

Will be doing a 4th order for a single 15" Q. Was going to make the sealed chamber 1.8cubes and the ported chamber around 4 cubes and tune around 44-48 with 16-20" of port per cube. Does anyone see any issue with this...

I was banging it at mid level volume (25 out 0f 60) for about an hour. Its getting 1200 watts rms from a 9.1 at 1 ohm, my gains must be set a little to high. I bought an old bass mechanic cd from circuit city yesterday, this morning I put it in just before I left my home, by the time I made it to work I was at the end of the cd and was listening to test tones, they went from 20hz all the way to 99hz, I only listened up to 35hz before I cut it off. I felt my amp before leaving the vehicle, it too was warm, I have never been able to get my 9.1 warm before. I then checked the BL in the trunk, the dust cap and surround were warm as well. I never once smelled any coil or glue …

Found pretty vague threads on this subject, so posting my own. Just wondering how well the BTL would hold up on a T2500-1bdCP rockford wired down to 1 ohm. This is my first Fi sub and i don't know how touchy they are. I'm going keep the box within specs ofc. 34 Hz, etc.....upgraded the electrical and have a guy thats excellent at tuning. I'm not crazy with the volume or gain so I figure running this beast at 2500 shouldn't be a problem, but just wanted to make sure with you guys if you have any experience with this. Thanks.

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?

i have the base model q18 and a 1kw amp that has been tested to put out 1200wrms. i have my q in a large box behind my seat in my truck and i can smell the coil a little if i blast it for a couple mins. the amp was set correctly with a dmm so i know its not clipping. so i was wondering if there was anything i could do to improve the cooling so it doesnt get so hot. could i add the bp optioned vent plug to the pole or would i need to sent it in to get work done to it. i dont want to void any warranty so if you could help fi guys that would be cool.

So I have a problem I am getting ready to make a ported box for my BTL 12 that is fully loaded. my big question is how do I tune my port to 32hz? the dimensions are 18w x 14h x 20d which comes out to be 2.20812 cubic feet. can I please get some help and advice I used a slot port calc but I guess the port length looked funny to me. Subwoofer Enclosure Calculators, Fraction to Decimal, Parallel, Series, Port Length and Volume Calculators Thank you

im running a hifonics bxi1206 on a fi ssd 15. im just wondering and have some questions about tuning the amp. can someone tell me like how i should adjust the amp and let it play loud but safely. what is the subsonic filter ? does it need to be all the way up or all the way down? im kinda lost on some of this....

Got a 12" Fi BL that needs reconed but was curious if I can recone with a totally different brand ie. Incriminator, Ascendant, Sundown, DD, etc

I have an 18 SX that I would like to have reconed. What is the procedure to have the sub sent in and reconed? What would the estimated price and shipping to 30286 (Georgia) cost? I emailed Fi Car Audio about a month ago, but unfortunately, I never got a reply. I've sent a couple more emails here and there, but still, no luck. Anyone have any ideas of how I can get in touch with them? I would call, but I was unable to find a phone number. Many thanks, Mike

Approximetely 1-2 weeks ago, I decided to I needed a new sub. There was a big upcoming sound competition in my town and I needed something to beat a rival of mine that had more money, and more time,haha So I knew Fi was a good place to go. At this point, i was extremely focused on beating my rival and so I decided to go all out with my power options (JBL BP1200.1) and get an 18" BL fully loaded. This worked pretty good for the competition. Didn't do as well as expected, but we tuned the box way to high in a poor guess on our part of the cars freq. it was around 41 and we were tuned for 47-49hz. still, we managed to hit 141.6 at the headrest with 1400 watts of power, stoc…