Fi Technical

Just drew this up on sketch up, 5 cubic feet tuned to 32 Hz with port dimensions 5 Wide x 16 High x 34 Long... Wondering what you guys think!

Anyone know how to figure out the resonant freq of the 10" BL's? I know they are supposed to be 40.3 Hz, but I had Fi tighten the suspension to handle more power on burps. How do I figure out the correct resonant freq without spending $100 on the Dayton woofer tester program? I had them built with the SPL option and the flatwind coils if that makes any difference.

Im going to put a 10" bl under my rear seats and need to know if it will fit. My box is going to measure 7.5" in height and the bottom of the seat is 9.5" tall. Is 2" enough room for the excursion of the bl? If not should i use 5/8" MDF or 1/2" MDF

I'm too lazy to A. Look down this page a bit to see the other 8 questions asking the EXACT SAME THING. & B. Use the search function. & C. Go read the stickys at the top of the page that list recommended enclosures for all of Fi's subs. ...so I figured I'd pollute the board some more with my "problem" that really isn't a problem, and doesn't need anymore discussion. Thank you.

Im looking around locally for a place to build a box for 2 15's. Ive heard of a place called precision audio but I'm not too sure if they use quality material/planning/preparation/etc. All I know is they charge about 250-300 for a box. Does this sound reasonable to you? I know there are a whole bunch of variables but judging from your past purchases and stuff, let me know, thanks.

Hey guys. Can you recone a RE SX 15 to a 15" BTL? Let me know!

What have you found to be a "sweet spot" for your 12" Q??! i'm running a SAE 1000D to it at 1 ohm. with BP option. i'm looking for both sealed and ported enclosure sweet spots. share your views here. by sweet spot i'm talking about where it makes you jizz when you hear it. come on don't hold back. i want it to be loud, but clean and tight, just like our women!.. well with the exception of the loudness, thats no good with the ladies lets hear it!

I was going to order these options: D1 Cooling Flatwind Daily Do I need Extreme lead? My setup will be 2 18" FI BL connected to Sundown 3000D. This will be my daily setup. Thanks,

I have 2 fully loaded BL 12's that are dual 2ohm and want to make them dual 1ohm. How hard is it to get them switched over? I have no skill at recone myself so do i need to send that back to FI? They are 3 months new.

Hi my name is michael, I am new here and figured this would be best place to get help. I have 2012 fusion, I want to add these 15s I understand the box will have to be built in the trunk and will pretty much take it all up. I will be putting the batteries in the spare tire well. I will be running DC power 270Xp. Min of 2 runs pos/ negative 0 gauge from front to rear and probley the NS-1 amp. I have around 45 inches in length, 18 High, and 25 deep. I have been doing some research and it looks possible and many cars have 2 15s but just trying to get others opinions. I know it gonna be hard but I figured might as well do it right the first time. Thank you for taking time to…

I just read about this sub at audiojunkies. I've got a pair of AA Atlases running free air in my little creampuff, a 94 Olds Cutlass Cierra. I'm thinking of replacing them with these. Any thoughts? I'm running 150w to each of the Atlases, I'll be doing the same to these. http://www.audiojunkies.com/blog/866#continued Thanks

What kind of wood do i use for my box. Somone told me partacile wood

My tahoe was rear ended a 2 weeks ago destroying my BL 18s. I had just purchased a RF T2500-1 and im awaiting my second. I have an Avalanche now and i want to run 3 dual 1-ohm BL 15s. My question is will the two 2500s be too much power for the BLs? Also, is there any problem wiring the subs in a "single voice coil per amp" setup, ie: 3 subs, 1 voice coil on one amp, one on the other?? Im kinda new at do-it-yourself car audio when it comes to complex wiring, so any help or advice, good or bad, is welcome.

ok guys i wanna put in my car 2 12" fi q d2 and i dont know how many cubic feet my box needs! i wanna hit lows soo i want it at 32hertz of tuning. i know that one fi q 12" need 2.35 cubic feet after sub displasement for 32hertz i have a 99 maxima and my maximum mesure is 36" width 14.5" height 26" dept i wanna use 3/4 mdf anyway i really need your help and thanks alot! and what type of glue ad nails should i use ... anyway really enjoyed your help

Since the board was wiped out not many old posts to search through. Joining the FI ranks and picking up a 15" Q for the GF's car. Trunk space is important to her so I'm looking at doing: 2.8 -3.0^3 @ 31Hz. Sub will be getting around 1000rms off a PG amp. She listens to most anything but country, so I'm looking for an all around good sounding/respectably loud set up. The few posts I've found most guys are using around 3.5^3, so anyone have experience with this sub in the smallest recommended size of 2.8^3? TIA...Mike

Well i'm not sure if this is the right place to post this, but i'm wondering what options would be enough to get a 15" BTL at around 2600rms with ease? Thanks

I am going to use my 12" in a room setup for listening to music, it will be on a 500 watt dayton plate amp. what size sealed enclosure would you recommend, looking to keep it under 2 cubic feet.

Ok, well Im trying all I can do to get some cf out of the box that im making to go under my back seat of my truck... I have figured out I can get about .74 cf out of my box but i might be able to get another .1-.2 cf out of it.... If it stays at the .74 cf, what would that do to the sound? I can use polly fill in it also, would that help? And if i can manage to get it up to .8-.9 before displacement, how much better would that be because it will be a decent ammount of work to get those extra few tenths of a cf...

Hi all, I just recently switched my Q10 from being sealed in an ext. cab S10 to .9cuft port enclosure in an '88 BMW 325ix. I took a ton of time designing the box for the bimmer because I was looking for more output down low so I shot for 27hz using 4in PVC. I got it all built up and installed and I'm slightly disappointed with it so far. Things just don't seem loud enough. I figured going ported AND in a larger cab compared to the S10 I would get more output but I'm getting significantly less. I must add, the enclosure is sealed up to the rear firewall firing into the cabin of the car through the ski pass hole so I have zero trunk rattle. I don't know how this would affec…

hey guys i have a single cab s10..i plan on running a single 10 between the seats inverted. i have came up wit 2.42cft...would 2 4in aero ports be big enough?? the guy i am buying it from said with that little of power i can build a 2.0cft box and gain a lot i plan on porting it out the side...would 3 in from the wall be enough room for the port?? my back wall is 52in. and my box is 49x13x6.5x10...also i am goin to use 1/2 MDF..any suggestions??

i know this is a real noob question but what is the cutout diameter of a btl 18"?

ive got a plan for my two 12" BL's. it comes out to be 5.5 cubes..is this too big? i can easly shrink it down or make it bigger if needed. thanks.

is the mt dvc 1.4 copper coil available through u guys here at Fi?

I just ordered my dual 2-ohm Fi Q15 last night and will be ordering the Cadence iA7 today. I was hoping that one of you would be able to point me in a good direction as to where I should buy an enclosure for this, or where I could have one built. I plan on going sealed, is there an ideal size besides just 2-2.6 cubes? Any other suggestions? Thanks guys

Im looking at this... for one Fi 18" BTL.... internal dimensions of: 17"H x 29.5"W x 31.5"D I subtracted .26 for speaker displacement, 1.428 for port displacement, and just guessed around .2 for bracing displacement (im mostly gonna use .75" threaded rods and some 2x2)... and I came up with a NET Volume of 7.25 cubes and the port is gonna be 17"h x 6"w x 26"d (with a total of 102 sq "/ 14.06 cubic inches each ft3) ...I came up with a 33.22 hz tune with all this..... can ya'll review these specs, and let me know if this all seems correct? I would greatly appreciate it!!! :foshizzle: thanks, john