Fi Technical

Hey Scott, been a while... once again need your services for some recones, starting off with a standard recone for an RE XXX 15" (old style '05) with 2 spiders and DVC 1.4 coil I have a few more parts I need, a bit of a list, let me know if u prefer an email about it ill check back here later

Started on my box today for a single Fi Q 15" (still haven't ordered it yet though...). I just had to order from Fi as after reading tons of reviews and talking to a few people, I have heard nothing but great things, whether it be the great quality, customer service, and pricing. Anyway the box is sealed (thought I'd make my first build a little easier on myself...). The Q's should do well in both sealed and ported enclosures, correct? I double layered the top to make it 1.5" thick. The inside dimensions of the box are 11.75" tall x 20.5" wide x 20.5" deep. Total is 2.86ft.^3. Subtract the sub displacement from that and the grand total is 2.67ft.^3. The .7 (almost a 1" cu…

i'm debating on weather i should run my pcx2400 (800rms x 2 @ 2ohm) To 2 FI Q 10" dual 1ohm subs, in a prefabbed under seat downfire box, sealed .55cubes ea. (subthump.com) http://www.subthump.com/chd.htm OR build a custom box and remove part of the backseat ported 15 or 18 FI BL Dual 2ohm with the PPI pcx2400 1600w RMS x 1 @ 4ohms. in a box built to spec. problem with the big ported single sub is i'd be losing half the backseat, and would be visible by just looking in the window. I'm open to different sub/box combos using the ppi amp. console? blow through? behind the seat? 800x2 @ 2 or 1600x1 @ 1

Well I looked around to see if I could find the new specs of the 08' BTL. I couldn't find it, so if anybody could help me then that would be great. Thanks

I took the plunge and bout a BL 12 with Cooling, Flatwind, and Internal Leads. It will be powered with a MB Quart MB Quart Q1.1500D giving it 1500w RMS @ 1ohm. I now need to design a box that will fit in my trunk. The cutout that they have listed on the forum might work in my trunk but I would like to design one myself. I was thinking somewhere between the 2-2.5cuft (after sub and port displacement) and a slotted port tuned to 32Hz. It seems that every online calculator gives different results or has a cuft value that is crazy high. I was wondering what the actual formulas are for finding port length given the port area and desired port tuning? and any other formulas /…

Hi, i just have this dilemma on what to tune my box to for my Fi BL 10 going on the trunk of a Sedan i saw in the sticky topic that 32hz is the optimal tuning, does that also apply for Sedans? cause i just had this thought that tuning it to 32hz might not give much punch anymore and will only get loud on lows, is 34-35hz better for a Sedan? Thanks in Advance! -Carlo

I just bought a 15" FI-Q and now I am debating between amps. I looked at a high end: memphis mcd1000, Rockford Fosgate Power T10001bd, Low end: Hifonics BX1206D, Memphis PRD 1000.1. Any suggestions for an amp..or any listed that I should go with? Secondly, I am unsure if I should go ported with a low tune of 28-32hz or just go sealed with it. I want it to bump hard, deep bass and want some sq out of it. SO will that low tuned ported box give me a good sq but also hit hard?

hello im building a sealed box for 2 q15 subs in my 1996 honda civic hatchback, i have a few questions? 1.... should i have each sub in seperate chambers or the same chamber? what is the pros and cons of doing either? 2.... what kind of difference in sound should there be between the largest recommended size encloser and somewhere inbetween? and whats the pros and cons of each? 3.... what kind of effect would there be having the subs down facing? Now for my front stage i want some more midbass, i have 2 different types of 6.5 inch woofers, infinity perfect 6.1 and older set of diamond audio hex series, i was thinking of putting the infinitys in the doors and getting some …

i was playing my fi q 12 with bp power on a zx1500.1 in a 4th order bandpass bout 3.5 cubes all together and it was sounding good and knockin nicely when all the sudden it stopped no pop smell or anything. . i took the sub out an everything looks fawless but i tested the sub with a battery and a dmm and the ohm reading is all wierd i was just wondering if i can have this fixed or what ill send it in if i have to i just want my sub back. . . . Please help. Thanks, Teddy

Hi! I

after beating my subs for 8 months it appears my spiders got real soft. if i pust the cone its not as stiff as it used to be. so i was wondering. if i recone my subs, how much increase in output will i see. a rough estimate will do. thanks in advance.

My BL just stared making the noise yesterday, the sub is hooked up to a MTX TA81001. The gain is set at little over half. I really hope the voice coil is not going out.

I am going to build an enclosure soon and I don't know what box I should use Which box will get loud and clean a t line or ported , my sub is an Fi Audio SSD 12 any one have plans for either my trunk is 33x21x15 I like the quarter wave t line design but I'll do what you guys think is better Thanks -JJ

Hi all, one of my friend just bought a new 18"ssd with Flat wind and Bp power. he wanted to achieve maximum spl with minimum power so a bigger sub was chosen. Now, he has a blaupunkt vpa1500pro amplifier which puts out 950 Rms @ 2ohms and 1500@ 1 ohms. As the sub is dual 1ohms, he will be wiring it at 2ohms for a clean 950rms output. Now the problem starts, the car boot is limited to 4.5cufeet of space at maximum, the idea was to go for a ported box but as recommended by FI on this forum first few topics, atleast 6cufeet is needed for a SSD . And that's true due to its lesser powerful motor compared to Btl's or SMD's which can be used in 4.5 cufeet ported boxes. Roun…

Ok So box build is going nicely so far. Im working 16 hour days cause well im greedy and i soak up whatever over time is avalible..So iv slowed down a little bit... I hit a 140.4 with a sine wave... I then hit a 139.9 with music... Is this just because I didnt burp it? It seems as though the Sine wave and the Music are way to close.. Im just curious is all and would like to know before I go and re meter with the new box...

Hi! Im thinking about buy 2x Fi btl 15inch for my new system. But in the part of configure speaker i dont know what to choose! Its my second system so i still dont know to mutch. :/ I was thinking about the spl option. But the anothers i dont understand too mutch for what they serve Pleeease somebody can help me? uuh. And what amp you guys think are good to the subs? Thkx!

Hello everyone If anyone has the free time and could come up with a simple box for me that would be great. Id like to run them sealed and i will be giving them plenty of juice. ab 400.1 @ .5ohm. I have the electrical to back the amp up. The box will be going in a mazda 3 hatchback. Thanks for the time. Give me a email address and ill send over a few bucks via paypal. Thanks again.

I've had my Fi Q 12" (no BP option) for about a month and a half now and its been making a strange vibrating noise at certain frequencies since I bought it. I thought maybe it'd just need broken in a bit since seems to be hitting really well and doesn't sound distorted. But its still making the noise as much as it was the first day and its been broken in plenty since then. I made sure that it wasn't anything in my car rattling. I used an extra long run of speaker wire and put the box outside of the car and it was clearly the sub itself that was vibrating. Its audible with certain sounds in certain songs at a moderate volume but actually gets pretty irritating at high volu…

Hey guys im wondering what a P chamfer is on the fi q. thanks for the response!

hi, i just receive my BL and noted that there is a plug on the pole vent. Shall i take it off? here is the pix : http://s291.photobucket.com/albums/ll314/_...nt=DSC00241.jpg thanks.

these are the amps i possible want to get depending on the feedback i recieve to run my SSD12D2 w flatwind coil option running in a 2.25Cu.Ft. slot port box POWER ACOUSTIK LFA1-4000D.......199$ Power Acoustik A2400DB....240$ POWER ACOUSTIK STAX4000/1D......215$

Ive got a sp4 15. Is it possible to switch the basket to an 18.

I am curious as to about everything about the Q. I am newer to higher end car audio and will be doing something similar to my friend, who I think is getting 4 15" BTLs. How much SPL would 3 or 4 15" Q's produce? I want something that can cause tons of vibrations, maybe flex, but still sound amazing. not quite sure what to go with yet. Any help would be great. I would like the BTL's, but I think they would take up to much room in the bed of my truck, but I have yet to take solid measurements on how much room I actually will have. I am hoping to take up no more than about 3/4 of the bed, this including amps and extra batteries. Or suck it up and go with the BL or BT…

I have a BTL 15 dual mag hooked up 1 ohm mono to Sundown 3000. When I really want to get on it the sub sounds like it is bottoming out. When I had it hooked up 2 ohms it did not do this. Also I have yet to blow my 100 amp fuse. Have 300 amp fuse standing buy but with the popping I have to keep the sound down enough so I don't know if I'll ever blow this 100A fuse. Doesn't sound like tinsel slap to me. Box is tuned to 35hz and is almost 4cf. Thanks in advance Ronrico Joe

Car: 95' Lexus SC400. Driver: 1 or 2 Q's. 12s? Here's the deal, I'd love to do 2 12" Q's in about 2.8 cubes sealed or so. If I can make it fit. OR, I can do 1 12" Q and port it, but at what cost to SQ if the box is built properly? 1 Ported would yield a slightly smaller box if space is as much of an issue as it could potentially be once I tear out the false wall. The problem lies in that there is a Factory 10 and 2 4" in the rear deck, I think. 10 for sure, not 100% on the size of the mids there. The rear wall is steel with the gas tank there as well. Again, I have not had time to tear this out but I know there is at least some room in there because I've seen pic a…