Fi Technical

Just wondering... Does the Hixm coil has better efficiency in comparison with the standard BTL coil?What are the pros and cons when using the first in SPL /power handling/output? Is there any signifficant difference in the subs sensitivity? A few days i have watched some tests on some new quad stacked motor subs and i wondered if it would make any difference if the coils were put a little higher than they originaly ought to be put (like 4-5 windings were out of the motor top instead of putting all the coil in the magnet gap)

alright so i decided i'm going to build my box sometime this week. i'm having a hard time using box calculators and i don't quite trust my results for some reason. the box is going to get crammed into my 98 corolla. i made a replica box out of cardboard and the box has to be 17" heigh, 20" deep and as wide as needed. the sub is a fully loaded bl 15 and i would like the box to be 4cubic feet tuned at 30hz. can anyone please help me? -phil

Ok right now I have the Q 15's and I've gotten used to them so I want to upgrade to the BL series. My question is, ok i want the same freqency response as the Q's have cause I like how they perform down low, but I need to know which options in the BL should I go with to have a good daily woofer? I was thinking of going with the cooling, flatwind, daily, and universal options because I am not looking to do any competing just some really bad street beating. But Im a little skeptical about the cooling option because it says that there is less metal in the motor thus making it a little weaker? So should I just go with p/chamfer, flatwind, daily, and universal because I dont w…

can possibly pull this off? i have a 1975 caprice with a HUUUGE trunk

Just got this with copper coils. What gauge speaker cable should I use? I was going to feed it 700 watts RMS.

Optimal box internal volume is 1.1 after displacement, therefore, before displacement it would be 1.1 + .14 = 1.24 cubic feet. Would it be more advisable to buy a box that is slightly bigger than 1.24 and put something inside of it to displace volume or to buy a box slightly smaller and fill with polyfill? I'm finding boxes with 1.0 cubic feet and 1.5 and not sure which way to go.

Ok I've been trying to get my subs reconed for about three weeks now, I already know that they wont be covered under warranty because I overpowered them, but i have the money to get them fixed so if someone that works for fi could send me some info to get me on the right track, i would greatly appreciate it. Subs are:( 2) FI Q 15's D1 w/ BP power. THanks

So there is someone selling a blown 15" icon and i was thinking of picking it up. I was wondering if I could recone it with Q coils and put it in a 3 cu fu. @ 32 Hz? Would this work or am i just thinking to crazy? also how much would a 15" Q recone cost to 94803? thanks

I have two fi q 15 w/bp power that I need to ship in for recones. could you please send me the info that I need to go about doing this? do I pay before or after they have been fixed? thanks

I'm currently trying to design an enclosure for 3 Bl 10's i've got 1.85cu.ft of volume (total), with displacement. What sort of port area and length would i be looking at. Also, i can increase the volume slightly, as that is with 1inch MDF

Got 2-12" BTLs the old versions. Im trying to make up my mind on what to power them with between a AT-5000.1D or the AT-7000.1D. Its only going to be a daily blowthrough in a '97 Thunderbird. Which do u think I aught to go with? If I went with the 5K Id be saving needed space due to less batteries. If I went with the 7K its a $400 difference in price and Id have to get an extra rear battery on top of the ones I already plan to run.

Curious specificaly on the ''Q'' 18 w/bp

What are they since there not posted on your website? Actually, none of the parameters for any of the BTL's are posted on your website?

i was wondering if you guys would help me get my port lengths and areas down. i just reciveved my btl 18" yesterday and looking to build the box right now i am looking at having a 7 cu ft after displacemnet. i alos think i want it tuned to about 32 hz. i t will be square port

assuming both had the BP option and would be fed by a 2200 w rms amp, what kind kind of difference would i notice musically between the subs?

I have a 98 reg cab s10, i want to do either 2 10'' Fi SSD subs. I would like to know how many i could do and rather do it sealed or ported. Any help would be nice thinks

Ok i have two d1 q 15 w/bp power and when I first recieved the subs, they hit extremely hard but after a couple of weeks and a local comp, the subs just dont perform like they used to. when they hit the lows now the bass kind of fades away and sounds like a fart and they dont even put out the pressure like they used to either. I've checked the box first to make sure there were no leaks and everything is fine. I think the spiders have gotten weak cause they just dont "thunder" anymore. Time for recones right?

This is tuned to 36hz THIS is tuned to 32hz The 3 round ports are 6inch by 16.75L

I'm in the process of buying a 15" BL within the next two weeks. i was going to pay someone to build me a box, but its going to cost +$200 and take well over 3 weeks for him to build it. so i decided to do some some research (and save some $$$$) and found two enclosure plans that fit the 15" what one should i build? the first design or this one Net volume: 3.5cuft Tuning: 33Hz Port Area: 52.5(15"Hx3.5"W) Dimensions:16.5H"X24D"x26.5W" *design stolen from ROE. Another question, Its a fully loaded 15" Bl powered by a rockford fosgate T1500-1BD the amp is rated at 1000W x 1 @ 2-Ohms RMS 1500W x 1 @ 1-Ohm RMS is it safe to wire the subwoofer at 1ohm for daily play? i know…

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.

I need a box for meca event the 20th here is what i have to work with 18 tall 24 deep 49 wide please help i'm try to break the 50's sorry it's in a 98 tahoe

hi there just bought a fully loaded 15" btl. i used my original box that my audiopipe txxa-15bl was in. the box is 3.5"cu with 36 sq inches of port 2X18. the box is 3.5 before i put the btl in it so its actually less then that. i think the box is to small its in a 98 civic sedan. my wires are 4 guage i know i need to upgrade and a new battery and new alt. but was wondering if i could get a box design ffor maybe 4.5 or even 5 cubes design if anyone had it for this sub. another thing what is a good line driver.

Hi all, I'm new to the forum but been in audio for some time. I posted earlier about making the change to Fi and Sundown. Great product! This is the old system, it is 2 Gain Industries GP18DVC2 subs running off an old school Lanzar Opti 50C, stock electrical. The best part: This box will work perfectly with 2 BL 18's, space, port and all. <object width="425" height="344"><param name="movie" value=" name="allowFullScreen" value="true"></param><embed src=" type="application/x-shockwave-flash" allowfullscreen="true" width="425" height="344"></embed></object>

i was wondering if any one had any box specifications that they have built, and if you could pass the information along, im needing to build a box to fit in the trunk of my civic, only going to be running one 12 inch driver, and slot port, was wondering and anyone had any dimensions for a box, and port tuned to 32hz. thanks alot im new to this scene, so if i sound like an idiot, just tell me.

I've got a 2000 Frontier xcab and I've got 10.42 cu ft box for 2 18's to work with. I've got a saz3000d coming but I want to know if I should go with 2 BL 18's or 1 BTL 18. I'm thinking the 2 bl's would be louder, but the btl has better Xmax with the x coil option. I don't crank my system all the time( I have a toggle switch so I can shut the sub amp off-It's great for keeping the cops at bay) but when I do I want to incite fear and cure constipation from a distance. I want the hair trick factor and I want it to sound ok, not like complete chit. I'm looking for some serious BOOM for what space I got. It will be in competitions and electrical upgrades will be done. …