Fi Technical

Hi guys, I was looking at the cut sheets for the fi Q 12 ported which is tunes to 32 Hz, and have a few question. what would I have to do, (if it can be done) to the same box, to tune it to 28 Hz? Or Would I have to build another box? Would you recommend tuning it to 28 Hz as opposed to 32 Hz ? What are the prows and cons? Thanks, Shopvac

I'm going to do my box at 8.8 Cubes with dicplacement I'm looking close to 8 cubes. 8.5 with the sub and I'm thinking about the port. Should I do a 4x18? or a 5x18 tuned to 28hz.. Thanks guys

Ok, I am a ported enclosure built from pound that sound for 2-12" Fi Bl subs. I built a cardboard box like he asked as big as possible to fit in my trunk. It ended up being 39" wide x 13" Tall x 15" deep. This was sitting on the ledges on each side of the trunk and the spare tire hole being empty on the center. The box has to be dropped in from the top and has about an inch and a half gap on the top, and the side facing the rear of the car. Will this be enough space for those subs? I notice it asks for 1.8-2.5 per sub so I think I am a little small unless I would extend the bottom center of the box down into the spare tire well. HMMMMM?

Driving along one day and my 12" SSD cuts out. Its in a sealed 1.1 cu ft box. I l=pulled the sub out of the box, and noticed that an internal lead on each of the voice coils has come undone and is frayed. (Photo: http://www.i.imgur.com/jCFOwGQ.jpg) I called the shop i got it installed at, and they said they don't touch sub repairs. Is this something that can be repaired? Am i Going to have to send it in to Fi to get reconed? Does anyone know a good shop in the SF Bay Area that could fix this? Also, after a bit more research, it seems this can happen when using an improper sized box. But i was using the Fi recommended 1.1 cu ft for a sealed box. But I do not have the…

after reading tons of reviews and watching a ton of vids on you tube my 8 month journey has brought me to fi tomorrow im ordering 2 15'' q's..i will be sending around 2000-2500 watts in total..now i need some help please guys..id like some suggestions on what size box to go for both sealed and ported..because im not building my own box im having a shop do it for me so i cant just try a few boxes i dont have the funds to do that..90% of the music will be rap and the other 10% will be a mix of all other kinds of music..going 15's i obviously want it loud but id like it to be musical..have sq to them..im not just looking to sound like a fart canon or anything..i hope this in…

i know every car is different. i have a civic sedan 98. my btl is firing forward with the port forwrd. i was wondering will it get louder if i face everything towards the rear of the car.

Hey guys, I have an 18" BL running at about 1200 watts and this thing moves air. I've had some problems with my rear deck flapping up and down no matter how much I seal it off. It seems air is always getting into it. It will even start shaking my rear seats and moving them in and out (they are foldable). My rear speakers currently are a sealed speaker. In such that they are an older JBL pair I got from a friend's lincoln. So the cone isn't being moved or anything by the air. I don't ever use rear fil, i just threw them in there to help seal up the rear deck and so on. My question is this though...by attempting to seal up the rear deck (dynamating it, covering all the hole…

This happens to me several times (actually everytime I turn up the volume). Just playing like 10-15 mins and I could smell the VC. When I touch its hot (not to the point where you can cook eggs with it) but just wondering whether I am killing the Q slowly if not quickly. the amp also runs hot but amps are made that way (thats why they have heatsink). Is my sub ok with it or is it with the low voltage and high current thinggy... thanks Wynold

hi im a proud Fi owner and was planning on upgrading some time in the near future.. i have a BL right now and would like to upgrade to a BTL... i had a custom enclosure made just for my BL made to all Fi's specs... i was wondering would it be possible to reuse this box for a BTL?

I'm planning on getting a 12" Fi Q (dual 1 ohm with cooling, spider and heat ring) and putting it in a ported box and I am on the hunt for an amp to boot. I think I found what i want and its a Hifonics HFi1000D but i also saw a Hifonics HFi1200D for $50 more so i was wondering if its a good idea to go with the extra 200 watts and if i should just stay around 1000 watts since thats what the sub is rated at. http://www.sonicelectronix.com/item_23548_Hifonics-Brutus-BRZ1200.1D.html http://www.sonicelectronix.com/item_22705_Hifonics-HFi1000D.html edit: added the amps link.

I would dare to say I am pretty cautious. I have a 12" Q dual 2, cooling and all that, and am running a 1000 watt rms mono amp to it. I was just kinda curious as to whether it was possible to blow the sub with that amp or do any damage to it. I have the level a pretty safe setting and make sure to keep the bass equalizer down, but i would like to get a little more out of it. Any insight would be appreciated

Hey guys, I think i'm going to be purchasing a Q12. I have reservations that I have the space for an adequete box though. I have a 2002 BMW 325i. Here are a few pics of the way my backseat/trunk is (borrowed from a bimmer forum): and i was hoping to have it look something like this when it was complete: As you can see the setup is geared towards a show car, but I do actually drive the car around quite a bit, so sound quality is a concern of mine. How practical would something like that setup be for sound quality? SPL doens't matter as much for me. Thanks

So i just got my dual 2 ohm 15 inch BTL fully loaded and I am going to run a 2100 hifonics amp to power it. So today i go to my local car audio shop so they can install it for me and they said that they can only wire it down to 3 ohm or .75 ohm because the voice coils are 1.4 ohm each...However, everyone else on this forum says they are running their 2 ohm Fi sub down to 1 ohm. I am a complete car audio noob so if someone could please tell me if this is true or not i would greatly appreciate it. Thank you!

I need to know what kind of re cone i can get for this blown RE Audio HC Quad Coil or if i can even get one.. i would like to make it a dual 2 or something wondering what series you think it would stand up to with the FI's i mean this HC is tripple stacked magnet but i dont think its a BTL... i could be wrong thou. Let me know thanks Jesse..

im ordering ssd12's and i dont know wat to pick between standard or h qts.. i have no idea wat it means, so if anyone knows please tell me. thanks

Before you tell me to look at the sticky, let me explain. I looked at the sticky and it said that the a cut list and more in depth enclosure recommendations would be available soon, and that was a long while ago. If anyone has experimented A LOT with the 18 SSD please explain it to me. How much port area, size, tuning, wattage, sub and port placement, and pictures if possible. I really would appreciate anything you can give me.

Hi, i'm Patrick from Germany and i just ordered a Fi BTL 15 with Cooling and HiXM Coil for daily driver. The BTL replaces my old RE SX 15 wich i operated in a aprox. 4,7 cubes box, tuned to 35 Hz.... My problem now is that i don't know how to build a enclosure for the BTL because i usually calculated everything with Win ISD but this doesnt work with the btls TSP'S... Can you help me or say what i have to build. Max dimentions are: width: 93 cm or 36,61 inch height: 45 cm or 17.72 inch depth: more than 100cm or 40 inch I'm running it with a RF T20001bd and kinetik batts.. I hear lots of young jeezy and gucci mane... My Peak with the SX was 141,9 with 45hz on Termlab, hope…

does one 18 btl handle 4k rms for daily listening? in a 10 cft box. i just want to get the most out of my btl so i think of strapping my two bxi 2610 two 2 ohm. someone told me one could never have enough rms for music. this guy was running 4 15 l7 on a kicker warhorse.

I am planning a new home theatre to replace my mirage system for my new house. The room is 15x19 with 9' ceilings, and there are large openings into the dining room and it is open to the front door entrance and hallway. This will be used for about 75% HT/TV and 25% music. I am going to switch to a pioneer elite vsx-23txh with 3 elemental designs A6-6T6-MTMs as my FL, FR, and C channels, and probably some A3-5Ts for the RL and RR. I will be needing a sub as well and would like to make one to save some cash. I was thinking about doing an IB3 15 or 18 on an ED LT/1300. Just wondering what type of box to do, have seen them in really big sealed and ported enclosures as well a…

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 really need an RA# for my bad sub. I have called and sent numorus emails but have received no return contact. I have been emailing and calling from December and even tried to find you at CES. Please someone contact me so I can repair my sub. I have all receipts and have all the emails dated to show I tried to contact you before my waranty expired. Thanks, Mel.

Here is my problem. For quite some time I planned on putting 4 15" BTL's in the bed of my truck, forward facing. I have a fiberglass lid, not a camper shell, so no wall. I know they need to be ported, at least I want them to be. Is there anyway to put the 4 15's in there or will I have to go to either 3 15's or 4 12's. Out of those two, which will be louder and hit harder. I was thinkin the 12's, esp in the box is right. I will be correctly powering each sub, so power is not the issue here. So, what do you think bout my situation and any ideas??????? THANKS

Looking at the BTL SPL vs Daily Option.. I would like to use a pair of 15"s mainly for SPL competitions, BUT i would like to squeeze JUST a song or two out of them every once in a while.. They are not to be used as daily play subs.. my question is, would i be able to get away with playing music for a short while with them, with the SPL option, or would i be better off using taking the daily option instead.. thanks

i want to build a box but have no idea how to go about finding a program some please help or design a quick one for me dimesions are 12W x 10D x 20H i used klaus but keep getting crazy measurements Custom Klaus Audio Subwoofer Box Enclosure Type Box Type: Single 10" Straight Ported Standard Subwoofer Box Item #: 022-015 Subwoofer Information Cutout diameter: 9.25 inches Mounting Depth 6.5 inches Enclosure Details Carpeting: Dark Gray Port Type: Slot Port Port Tuning: 33 Hz Port Dimensions: 11.25 x 1.25 inches (Height x Width) (port length is not displayed) Port area: 14.06 square inches Number of Ports: 1 Net Intern…

Ive been looking into a sp4 18 and have a few questions, hoping to find somone on the fourms instead of flooding fi with emails atm. Would running a cresendo 3500 to a single 18 sp4 at .7 be to much? Also how many cubes should i go with with 1 18 on 3500 tuned to 32hz. I would be getting the sub with all the opitions also if that makes a differnce in power handling. Thanks guys!!