Fi Technical

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?

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…

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…

Well my issue here is a i just picked up a fi btl n2 (came in today) and i'm going to start building the box for it soon. i recently found out to quite a bit of dissapointment, that my rockford fosgate t2500-1bdCP doesn't have a variable subsonic filter, but rather a cheesy switched one. I know i need to tune my amp 2-3 hertz below my enclsoures PTF, but what if my enclosure ends up being out of range or the amplifiers tuning controls? Crossover Controls Low-Pass (LP): 35Hz-250Hz @ 24dB/octave Butterworth Infrasonic: 12dB/octave Butterworth, -3dB @ 28Hz any insight guys?

desperately need to know how much each woofer will receive @ a final load of 1 ohm..thanks all!im searchin through amps so just another option after u guys judge it.

I was wondering what would be the best enclosure to make these subs get super loud, but not lose very much SQ? the max dimensions i can use are 58" (W) x 31" (H) x 38" (L), But that's max ( i don't plan on making a box that big unless that's what will be the best. Can you please give some dimensions or an estimate, and also what you think would be the best frequency to tune it to? thank you

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…

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…

Hey fellow forum go'ers, long time reader first time poster. Just recently pulled the trigger on a BL 12 cant wait for it to show up, and for some reason work thinks all the box calculator sites need to be blocked So here's my what i have BL12 d1vc powering it with a Rockford Fosgate T1000-1bdCP i need a box design max dimensions are 20Wx18Dx26H max its going in the backseat of a f-150 extended cab in place of the stupid little jumber seat behind the driver seat. If one of you fantastic box guru's could lend me a hand with a slot ported box tuned to 32hz i would much appreiciate it. I think 32hz is what im after anyways listen to most everything. Thanks all i…

Howdy, I've been in the planning stages on this for a while and I think I've got it figured out. I'm going for 4 x BTL 12's Fully loaded in this wall: The specs are like this: 19.69 cubes gross 16 cubes net (Subs and Ports removed) 4 cubes per sub Tuned to 32hz with 266.875 sq. in. of port I'd like to run dual 2 ohm BTL's and have each one off of a Orion HCCA-D5000 so roughly 2500 watts RMS per sub (10k total). I'm planning to run all Knu Konceptz 1/0 wire with multiple runs to a battery bank of 6 Kinetik HC2400's in the trunk and 2 200 amp alts. So my question is, do these specs look good for the subs and such?

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?

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

well im planning on buying a Fi Q 12" either putting the order during this week, well the thing is that i already have the box for 1 12" it is 29w x 14h x 14d making it 2.48 cuft, 2.32 after displacement of the Fi q (.16) i went to www.the12volt.com and the calculator said that if i used a 4" diameter port it would have to be 11.33" ifor a 32hz. is that right? anyone, scott? thanks

Can a pair of Fi Q15's be ported and tuned to 30hz in a properly sized enclosure, if my max external dimensions are 22" (d) x 19" (h) x 38.5" (w)? Less height and depth if possible... I was planning on running them sealed, since I know they have great lowend sealed, but if I can still have great lows with more output, I want to got for that. This is for a Dodge Magnum. My goal is to have the most output while maintaining a somewhat flat response, with the gut twisting lowend.

i have 2 10" Q's sealed, when i installed them i set the amp, after a few days i noticed they could take more (with out hearing a pop sound) so i adjusted the amp higher, i have done this twice now........ just want to make sure this is normal.

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

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

Alright first off sorry for so many topics about all the subs. Im just in the process of deciding and im all over the place lol. But i think i have narrowed it down to either 1 12" Bl with BP Power and Flatwind Coil or 1 15" Q with BP Power. Both will be ported. I will use the US Amps MD 1D (underrated 1200w @ 1 ohm). I drive a 2004 Ford F-150 and will be taking out one of my back seats so i have about 7cuft to work with. As of now i am leaning towards the Q because it is about $70 cheaper and because i also listen to not only rap but country alot... Just want to hear some thoughts and opinions. Thanks

Yo guys I am wondering if any body in north Mississippi or perhaps Memphis has a Fi sub cause I'm about to get myself a 18 btl. I just wanted to see the quality in person and the sound because it's talked about alot in these forums. Thanks again

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

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.

I'm about to recone my N2s, as well as changing the size of the basket. Shipping is over $160 to Fi and back and that's a real bank breaker for a poor guy like myself. How easy is it to change the basket on the N2s, and is it easy enough to recone a sub by an average joe?

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…

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…

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