Fi Technical

What size ports are you guys using for your Q's? I'm building a custom fiberglass enclosure for my standard cab and i need some info on what people saw was the best result. I will be using round ports. To sum it up, what size diameter,length port do i need to not have port noise and have excellent sound. I was going to build it exactly to 2.5 cuft with displacement and port. Should i make the enclosure smaller? what are peoples views on this-Thanks

i have a fully loaded btl 18 that I need to fit in the trunk what should I do!!???

I have a mazda ext cab pickup and have about 12cu feet to work with. I really want the FI Q18's. I have never owned a pair of 18's and that's what i want. I want to kind of do what Steve Meade did in his honda and build the enclosure inside of the truck. If i can't do that this is the space i have to work with 30in high x 49in wide x 14in deep. If i built inside i think it would be a little bigger. I was wondering if I can't fit 2 of the Q's, should I just use 1 of the Bl's?

so i hooked up my sub and amp. its a dual 1 ohm 12" q to a jl 1000.1 and it sounds like poo. i get a slapping sound even with the bass almost all the way down and the volume not even half way up. i havent tuned a jl amp before and theres all sorts of knobs and switches and what not, the box is sealed and around 1.2ft ^3 after the sub displacement. any help is greatly appreciated. thanks

where can i find good box measures ((length width depth port)) for a single 12" btl. i dont have any experience in box building and i dont want to do guess work. can anybody have me with this.

Never mounted an amplifier right next to a woofer before, so it i tried it. Currently I have two 15" Fi Q's mounted invertedly behind the back seat of my car. There was just enough room to mount the p450.4 in between the magnets of the Q's, which positioned the amp perfectly at the reach through in the back seat. Doesn't seem to affect any perfomance aspect of the amplifier, so I guess all is good there, maybe i got lucky, or maybe i'm just sketchin. Next item of business though, What about mounting batteries too close to woofers? Does it matter? Talking kinetiks here too, not some cheap lead acid. I wouldn't see why this would be a problem, but I learn new things al…

im new to this so what do they all mean? and i want to get two bl 15" so do i get dual 1 or 2 to get 1 ohm?

I just popped my FI cherry () and bought a FI 15 with cooling, daily, universal, and a red dustcap what kind of enclosure am i looking for? i have a 1995 lumina, and now im seeing what kind of box i should go for. ( i have a very large trunk. ) i think my MTX JH55 is a 4 cube box. and i still have room for a little more, could someone post the exact and best enclosure for the FI BL 15 thank you in advanced -Julian

i believe the biggest size i can do is 30x30x14 .. thats about 4cubes.. i made a design on re calc.. http://www.reaudio.com/speaker_box/LPort_Box_Calc.html

I just ordered a 15'" bl. I order a dual 1 cause I wanted to run 1ohm. I forgot that with 1 ohm you can only got to 2 or .5. If I get another bl dual 1 could I wire it in a (series/parallel) and get 1 ohm. Thanks all

I currently have a wall in my car for 6 12s in a bandpass and I'm in the process of upgradeing my subs. My specs on the sealed chambers of my box are 3.69 cubes per side (three chambered box). Just wondering what subs would work best for a daily setup and to compete in bass boxing. Any advice would be helpfull. I'm getting new amps and waiting to get subs before i buy amps

Hi yea i just got my 15" BL.... Thank you Fi Audio for a nice and fast delivery.... Now my question is, for anyone who owns one of these u kno how heavy that thing is so i wanna kno what kinda screws should i use or bolts, i dont wanna use basic screws i feel that this sub will just break them like toothpicks.... I cant wait to hear this bad boy in action Thanks

I bought a ford supercrew yesterday..... about 3 weeks ago i bought 2 fi q 10s, i saw that it didnt require to much airspace for a ported. i went to a local box builder who makes awesome boxes and he laughed in my face when i told him ported is .6-1.2 well he said his not building and so im trying to get a plan b..... i found a site that has a 2.5 seat lift http://www.supercrewsound.com/commerce/pro...21&catId=52 and they make a sealed box that is .95 perside http://www.supercrewsound.com/commerce/pro...23&catId=58 i need some input if possible would this be good seat lift and the box sealed? r is there a way i can get this box and make it ported, that would be…

Ik that the Fi BTL is 2000 RMS and 4000 watt peak butt ive been reading some topics and some ppl are saying that the 4000 watt amp will be to power full and could ruin the cone

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

I have an FiQ 15 and it bottomed out on about 5 notes for less than 30 seconds due to faulty ground wire. I was just wondering if any permanent damage could have been done to the sub? It plays fine now after securing the ground wire, but i'm just waiting for something to pop.

what fi specifiacations (dual voice coil, hixm, etc) shoud i pair up with a 2600 rms hifonics?

I'm going to run 2-18'' BTL's each in there own box with 2500 watts to each sub. I would like to know if 6 cubes each would be good for the power that i'm running or should the box be bigger to reach full xmax? And do you have to add the ports size to the size of the box or not? I know you add the sub displacement to the box so do you add the ports to??? Want to run 2-6'' Precision Ports pre sub tuned @32hz. Does this sound like it would work? Want LOUD DEEEEEEEEEP BASS. And what is the disp. of a fully load BTL? Any help would be great.

what does Universal option do to the sub frequencies response? will it make the SPL lower since the motor is not optimised for the coil impedence chosen? or does it give the 'peaky' effect like flatwind?

im just wondering if it would be possible to have softparts assembled to work on a fosgate power hx2? i can take exact measurements if needed, but from what i can see so far it has a 4" dual 2 ohm coil and an 8" spider like i said though i can take better measurements of everything if you guys can help me out on this one. btw i have tried contacting RF direct and they stopped making softparts for this particular sub seeing as though its over 3 years old.] TIA chris

I have 2 fi Q 15's (w/ BP Power) in a sealed enclosure (seperate chambers) in a 2000 dodge dakota. Each chamber is 2.5 cu.ft after all displacment. I have my gain set on my amp (AQ2200D) to 4 V the same as the output of my head unit (Pioneer AVH-P5050DVD). My bass boss is all the way down, and so is my subsonic filter. The max vol. on this unit is 40 but i usually listen to my music with the vol. set to about 24-26. I just installed the system about three days ago so am still "breaking in the subs." On my way to work lastnight, i could smell whats seemed to be something buring. All my bass levels are set to either 0 or normal. Is there any reason for this to happen. I kno…

for 2 SP4 18's what else does this box need? do i have any errors in my math? gross volume 19.48 port length 26 (+2.5" for kerf correction) 30hz tune 14.37 cubic feet net volume .38 displacement .52 woffer displacement 1 extra baffle port thickness .75" box wood 1" MDF 204.25" squared of port area with 1:2.26 ratio http://i.imgur.com/MFLyfWx.jpg]

iam building a box will 41 INCHES BY 21 INCHES BY 22 " be fine for the sub and how many cubic feet would that be thanks for any help !!

I have a Fi BTL 12 running with a rockford fosgate amp but I've been wondering what I'm supposed to set the frequency knob to on the amp near the gain.I think it goes between 80hz-300hz. I dunno.any info anyone?

does an one know the displacement of a fully loaded BTL the web site say .26cuft but thats not with the 3rd slug, just tring to get as close as i can so that way my port will be as tuned as possible, or is .26cuft close enough