Fi Technical

I've had my Q12 for about 2 weeks now. It's been playing very nicely and hitting hard. But last night while driving around it started to cut out. It would hit a few notes and then stop. A few seconds later it would pick back up for a while. It's a D2 woofer connected to a Cadence TXA1000D amp 1ohm. It's wired in parallel. I turned down the gains and reset the settings to zero and tried to retune it. Now it seems like it isn't getting any power to the sub...I checked all the wire connections...seem to be fine. I'm lost and kinda worried that my 2 week old sub is fried... =[ Please help...

I am looking for more SQ so i figured i would go sealed. But since i have a larger space, should i go ported? I want tight-punchy bass, I like feelin some of the high bass. My current box is huge and ported, so i think this would be the right change (sealed). Thanks

This is my original plan and am wanting to make sure this is my best option for Loud and clean bass. I was used to running 1 Audioque 15" ported at 29hz in 7.5cu ft box off of 1400w, it was ungodly! Current setup - 1 Audioque 15" Sealed in 2.2 cu ft off of 1400w. It is a little less loud in the low frequency area due to a lot lower group delay as well but like how it sounds as well. Anyways, my current project is to have 3 12" Qs off of 3 optidrive 2000ds. Each q would be wired to 0.35ohms all in a common chamber sealed box roughly 2-2.4cu ft stuffed with polyfill (emailed fi about this to see what they say bout the polyfill). Now, these amps are rated at doind 1,600w at…

what do you think. Will face rear of 02 grand cherokee. 1200rms amp. 6 cubes. tuned right around 33.5ish 4.5in port width 39.5in width 18in height 20.5in depth thats only gonna leave me with like .5in between port and sub, sub and sub, and other side of box. (including .75in MDF) concerns/recomendations

i was just thinking(usually dangerous) i have an amp that is1200 @2ohms mono, 600per channel@1ohm. presently i have dvc4 woofers if i hook them up the regular way i get 4ohm or 1ohm mono. i have been reading that some people hook an amp to both voice coils so each amp i guess would see 4 ohms off each coil, right? now heres the crazy part; shouldnt i be able to take the + - off one coil on one speaker then the + - off the other put them together on one channel and get 1 ohm? then do the same for the other coils and get the same for the other channel, now all four coils are running off two channels thus giving the amp its 1ohm per channel? . is this possible or am i thin…

I have a 04 Honda Accord sedan and I was looking @ the 15" Q which would be daily. I have a couple questions 1. 1ohm vs 2ohm (amp running about 1000-1200 RMS) 2. SQ wise should i go ported/non ported? 3. I don't know if a 2 cube box would even fit in the trunk any suggestions @ all, im new to car stereo if you didn't already know lol. ANY INFO WOULD HELP! thanks, -B

Ok, well Im trying all I can do to get some cf out of the box that im making to go under my back seat of my truck... I have figured out I can get about .74 cf out of my box but i might be able to get another .1-.2 cf out of it.... If it stays at the .74 cf, what would that do to the sound? I can use polly fill in it also, would that help? And if i can manage to get it up to .8-.9 before displacement, how much better would that be because it will be a decent ammount of work to get those extra few tenths of a cf...

Well, my box for my truck is gonna have to have a few pretty tricky shapes in it and I need to be sure that the magnet will clear on one side thats gonna be sloped.... I just need to know how wide the mag is on the ssd and if you don't mind, the Q as well... Thanks...

Well i received my 12 inch q in the mail about 3 weeks ago, was packaged with much care and got here in a timely manner considering the holidays, thanks fi. The sub is in a 2.7@32hz box, sub and port back. The Q is being pushed by a US Amps XT4000d(1500rms@1 ohm), so it's getting all the power it needs. The Q gets fairly loud and sounds great with different types of music, but I'm just not getting the lows that i was expecting after reading all the reviews on it. Songs like soul survivor and the low note in hypnotize just aren't being played with authority. I know that there is supposed to be a break-in time with this sub, but the suspension has loosened up since the firs…

Anyone have custom box dimensions for two 15" ssd?

Can FI do this to my Conecpt PT's? Sorry that i posted this but im sure someone can answer me faster then emailing them...

with a box at 27x21x27 what size port would i need to run a 18"btl at 2000 watts? this is just the available area for the box. with displacement it puts the box at 7.13ft^3. and i am using 3/4 mdf. or would it be better to run both btl's in the same enclosure and port it. if so the box would change to 27x42x27. what port length would be needed to run it at 32hz?

This is my first real system and I plan on running 2 10" FI Q's with a Sundown Audio SAZ-3000D. I have plenty of experience with woodwork, but since this is my first real system where I'm building my own box, I need some help with that. First off, originally I was planning on facing the subs inside the car and seal off the rest of the trunk. It's a 4-door and I can't really remove the back seat, but the majority of the time the back seat is down anyway. However, after reading a bit more I've heard a lot of people mention and tests done to show the subs may actually be louder facing the rear of the car. What do you guys think the optimal setup in my car will be? I'm drivin…

Im running a single sundown 1500saz for now, but might get a second in the future. My vehicle is an ex. cab S10 that I can fit roughly 7-7.5 cube ported box in. Im wanting the most SPL out of my setup and I am comparing 2 15" SSD's against a single 18" BTL. I know my 1 amp wont push the BTL to its limits, but it should do very well with the SSD's. My question is will I get the loudest results running the Sundown at 0.5 ohm (18-1900 watts) with 2 15" SSD's or a single BTL 18?? thanks in advance! Cody

Guys, I know the BTL enclosure recommendation for the 15" BTL is 3-5 cubes net, however I also know that required volume is also dependent on power supplied. I was wanting to know if there would be any problems with running (3) 15" BTL's in a 8 cube net shared chamber enclosure? I should have roughly 3500 watts on tap for each sub, but I will not submit them to that much power, I was just wondering what I could get away with in terms of enclosure size? This is a daily beater.

It is 2.375ft/3 and tuned to 30Hz. I mostly listen to rap and some techno. Is this a good box for a Fi Q 12? http://www.caraudio.com/forum/showthread.php?t=280672

Well, After serching the forum, I have found what is included in a recone kit, but now its time for the questions. I was woundering what a 18" Dual 2 ohm BTL recone with flatwind coil will cost. Also I have never done a recone before but I beleive I do have the logic, and patience to do one, but would I be better of just sending in the motor and basket for a recone? Would it cost the same for a recone kit as it would to send in the sub (Shipping not taken into consideration here)

I have 4 15" kicker's in my car right now running off 2 hifonics 2006's. i am thinking about putting either 4 18's into a truck or 2 18's of the trunk of my car. i want to flex and have a lot of bass. i already sound loud i my car but i want more. do you think i am jumping out there to far with purchasing 4 fi btl 18's? and if so what sloutions do any of you have for me to get flex and more bass? I will probably using the same amps or buying the slightly higher rated brutus. Oh just fyi the car is a lincoln towncar

I just hooked up my brand new fi ssd 12 dual 1 ohm sub and hooked it up to a kicker zx750.1 amp and put it in a 2.5 cu ft box tuned to 33 hz. i turned the gain 1/2 way and bass boost to 9db. When i turn the head unit up the sub starts to smell like its burning glue or something. any ideas?

This is the box i'm gonna start to build this weekend if everything works out. It's gonna house a FI BTL 18 Loaded. Tell me your thoughts on the design good or bad thanks everyone for your input

Well im running my 15 q ported right now and ilike the way it sounds but i was wondering how many of u are running them in a sealed box? I know the ported would most likely get deeper than the sealed but i was wondering hwo much of a difference it would be sealed and what other peoples opinions on the q sealed are. I do listen to alot of rap thats why i went with ported. Was wondering everyones opinions on the ported vs. sealed. thanks

So I'm fixin to build a box to house an 18. I don't, however, know how to calculate my port size or to tune it. My maximum external dimensions are 35"W 30"D 17"H. I want the sub to face the ceiling of my vehicle. I don't know if thats gonna effect the port location or not. If someone could kindly walk me through the process of designing and sizing the port for my box, I'd be eternally greatful and totally post a picture log of the build process. Thanks in advance.

Hi, Ive got a MTX TA81001 amp that pushes 1500 watts at 1 ohm and im going to run a 15 inch Q. Do i need to get the BP option or will it be fine without it.

whats the most power you could safely put through a btl 18 loaded, and not blow the coil? im just wondering what some have tried and found to work where as someone might have tried ____ and blown said sub.

I have a pair of 10" BL's and chose the SPL option when I bought them. I had no intentions of playing music with them, but now I wonder if they'll handle playing music for a short period of time. I was thinking of trying Bass Race in Db Drags next season but don't want to have to buy new subs in order to do it. Does anyone know if these subs with the SPL option will handle music for 30 seconds at a time at full power?