Fi Technical

So I have 2 designs to choose from. Both designs have a total of 11 cubes and tuned @ 31Hz. This design fires into the side of my Xploder back by the hatch... Subs up, port up... What you guys think? EDIT: Big thanks to AMATT85 over @ SMD! I will be running the Qs off a MTX 92001

I'm about to get 2 Q 12's with cooling and spider but what is high QTS? i know its for a sealed box only but would i be okay running them in a sealed box without high QTS?

I have a 97' s10 single cab and i want to put a 10" or 12" Fi Bl series sub but dont have enough room behind the seat without eating my legs. Should i do a blow though where i put the box in the truck box?

Sooo, I am now in the process of designing my box for a single 10" sub down firing in a ported enclosure. I got the rough idea for the design from those AudioFire boxes for trucks. The sub will be down firing right behind the center console, the main box will go up to right above the rear seat from the ground, the port would then go from the box to the back of the seat and do a 90 degree and back towards the front seat. So, the port is going to be pretty much external from the main portion of the box....my question is, how do I go about figuring out the tuning frequency of this port? It is going to be a fairly thin port but pretty long and I am just not to sure. At th…

My 12 " Qs sounded bad since i bought them a few weeks ago (used) so today i figured i would build a new ported box for just 1 instead of having both in a sealed box. This is what i found when i took the woofer out. Looks like the motor wants off the basket pretty bad!!!!!

what happens when u tune a TL box lower than the drivers Fs ? for exampl the driver in question has an Fs of 26Hz and I would like to tune @ 20Hz besides the obvious wavelength being longer.... does the driver/box not perform quite as efficiently as one with an Fs of 20Hz? btw: how do I test the Fs of a sub ? I have a DVM and tone gen available...is that enough ? thanx guys

i. I have an old Fi Q that I need to get reconed. When I cut up the soft parts and cleaned up the basket I. Saw it had "Q D2". I figured that would give away the time period in which it was made. I was wondering the power handling of the magnet, as I was thinking of reconing it with a BL recone kit. Could I do that with a Q magnet? I have a mmatts d300hc reconing it to a dual 1 would be my plan. Could the BL recone work with this magnet?

I just received my fully loaded 12" Q with high qts option. Was wondering if anyone has been trying or testing sealed enclosures and has some recommendations/tips? I love lows. Had an 18" Q tuned to 28hz for a while but the box is just far too large and heavy for me. Im thinking of building it 1.5-1.75cuft while empty and putting some poly fill against the inner walls... not sure how the box size is affecting the woofer's output exactly.

Hey may be a dumb question but does the power handling differ from the original specs with the xmax coil and the cooling package added to the sub??? its the n2

Hey guys. Got a question concerning how much power to give a BTL. My previous system was a loaded 12" BL @ 1ohm load, and pushed by a 1500D amplifier with gains at about 7/10 and 4V headunit @ 22/35. I figure it was about 1200RMS? Now, I see all these people with BTL's saying they push them with 3500RMS+. I just don't see how that's going to be possible.. I'm asking because I figured I could get away with running a 2500D amp for a single loaded 12" Fi BTL . Should I really be looking at more powerful amps?

I'm kind of limited in space but here are the maximum external dimensions 34"W 18"D 14.5"H Sub is Fi BTL dual Mag. One out of Shawn Fleming's van from 2007 Dytna SBNs if anyone is familiar w/what he had. I only know that tit is a dual mag and will definately play music. Amp Sundown 3K Not looking for SPL nor just the LOWZ Sub up port back (I will do both in center although woofer mounted to one side makes more since to me) but hey what do I know I can't even measure CF So I guess basically can anyone figure out how much Cf my box will be minimal bracing (just 3 2x2s) 2 13"L 1 32.5"L and dimensions on a port WxH=port but how deep to adjust the tuning? Would like …

I recently purchased 2 Q15's and I'm going to have them in a custom made sealed box in the back of my car. I don't know what a good amp would be for them, so I'm looking for suggestions. Thanks. Specs from my order: - 2x Q15s - Dual 2 Ohm - Cooling: Yes - P Chamfer: Yes - High QTS: Yes - Spider: Yes - I Heat Ring: Yes - Internal Lead: Yes - Rms: 1500W

well like i stated on someone elses thread, my tinsel lead broke and i really felt the woofer didn't sound the same anymore. i was just looking at it and noticed that the surround is starting to crack around where it meets the cone. and i also need a terminal which i broke a long time ago. my question's.... do i order the recone an do it myself? never done it, so i'm kinda wanting to try it. do i send it back to fi and have them do it? i built a box for another guy in hawaii that has a btl and was wondering if they could do my tinsels like his? or, do i buy a new woofer, because shipping back and forth might be kinda pricey? any and all suggestions welcome and …

So I finally had finished my box, got my amp and my subs came, I was just waiting for the opportunity to install I got it all hooked up and no sound... After some trouble shooting- I hooked up an old amp and speaker to make sure all my power stuff was ok and my head unit was providing signal and so my old amp and speaker worked fine... So I replaced the amp thinking that was the problem and I am still having the same issue... So either there is a problem with my two BLs, a wiring issue, or an amp settings issue... Heres the specs on my system I hope you guys can shed some light on my situation... Thanks 2 10 in FiBL 1 Ohm DVC Hifonics BXI 2608D Kenwood DNX 5120 Headunit S…

What are some optimal dimensions for a box for a Fi BL 15. I really want "SQL". Need to know how many drivers port area port length tuning frequency. (W x H x D) Thanks for the help.

hello everyone. i just got metered today and had a 139db at 48 hertz with my single 12 btl. Just wondering if thats in the ball park of other people.it was on regular music i think the song was jeezy-put on

I currenty have thhe two subs in a 4th order blowthrough off of a 4500d on 16 volts. Gains were set around 1/2 way and it pounded for bout 4 days. Then I decided to turn it up a little. Between 1/2 and 3/4. Now the subs don't seem near as loud to me..could it be I'm just gettinng used to them? I'm gonna check with the dmm tomorrow and read the coils and see how many watts the amp is putting out...I hope I didn't mess anything up:(

So to start things off I have a 2000 silverado ext. cab. I am very interested in the FI Q series subs but have a quick question for those of you that are more knowledgeable than I. I would like to keep my back seat and put two subs underneath the seat, now my question is. which would be a better setup for a daily driver? I have approximately .8 cuft available for each sub. would two 12's sealed or two 10's ported be a better option? I understand that .8 cubs fits in both categories but have also heard that the 12's really need somewhere around 1.2-1.3 cuft. I listen to huge varieties of music at all different levels. and am not so much interested in hitting 145 db at one…

I just recently bought 2 FI BL 12's fully loaded with 4 inch voice coils. I have 2 questions for the forum if you guys can please help with me. First i am running a Rockford Fosgate 2500-1bdcp on the and since the subs are dual 1 ohm is this enough power for them? Second, the enclosure i had built for them is 4.23 cubic feet after everything and tuned to 33 hz. Will they sound good in this enclosure or should i have made it bigger? The amp puts out 3,526 watts total. Thanks in advance.

As I stated in another topic, I burnt one of the voice coils in one of my 12" SSDs. One of the voice coils is still fine. I was just wondering...until I get the recone kit in the mail, is there any way to wire up my amp to just one of the voice coils? The reason I thought about this is I did the AA battery test (hooking up the + and - to the sub to hear the pop) and since that made noise, I was thinking maybe it could run off one voice coil. If that is possible, would it be bad to have one sub like that and one sub wired normally? Technically wouldn't it just be 1.5 ohms? My amp is 1 ohm stable. Thanks a bunch, Mike

How risky is it? I searched this forum and the web, and did not find this specific instance of question. I would be wiring it to 2 ohms (1200rms). Had I known bass would get this addictive, I would have got a BTL off the bat!!

I was looking into the hifonics amps for price reasons. Looking for an amp around or under 200. I was thinking about the hifonics brz1200.1D. Opinions? This is just going to be a daily driver build with one BL12. Any help is apreciated. And just for kicks, the car is a 1987 Suzuki samurai.

Well here is the thing. Yesterday I tore out all my 4 gauge wiring to upgrade it to 1/0 welding cable, soldered and heat shrink and all that good stuff. Anyways I decided to take my sub out of it's box to look at it. It's been 2 years since I took it out and it wouldnt hurt to check for any wear/possible damage. I amost forgot what the back of the sub looked like lol. So I noticed the sub is "double slugged" or how people call it. I remember on Fi's website the Q had one magnet. So my question is why did they make the older Q with 2 and the newer ones with 1? Anything changed? Any sort of benefits from it or what? Just courious though. I was thinking of getting anothe…

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

Hi ive been running my 15" Q in a 2.2 cubed box for over a year now with a SAZ-1000d mono amp, and its been awesome! now making the boxes isnt a problem as i designed and built my last one! but im looking for something different and maybe a bit louder without changing much and spending alot! so i thought ill port it! i looked at the cut sheet in this section for the 15 ported in here but its slightly too big at 3.8 cubes and was wondering if anyone could adjust it to maybe 3.2-3.4 cubes for me :/ being a complete noob with port sizes and stuff! max height is about 17 1/2" really! Thanks Pez! sorry for being a pain