Fi Technical

Approximetely 1-2 weeks ago, I decided to I needed a new sub. There was a big upcoming sound competition in my town and I needed something to beat a rival of mine that had more money, and more time,haha So I knew Fi was a good place to go. At this point, i was extremely focused on beating my rival and so I decided to go all out with my power options (JBL BP1200.1) and get an 18" BL fully loaded. This worked pretty good for the competition. Didn't do as well as expected, but we tuned the box way to high in a poor guess on our part of the cars freq. it was around 41 and we were tuned for 47-49hz. still, we managed to hit 141.6 at the headrest with 1400 watts of power, stoc…

currently have 2 18" bl's off a kx2500.1 @ 1 ohm. birthsheet states ~3kw @ 2 ohms. here is my post copied from ca.com "currently they are sitting in 11.5 cubes or so tuned to about 35hz. output is pretty good but still not quite where i want it to be. seems like with my ammount of power they should be louder, especially for 2 18's. the only thing i can think of is box volume being on the small side. i was told by the FI guys that 5.5-6 cubes would be fine with my power, but im having doubts now. im thinking of sacrificing my rear seats and build the box to take up the whole cargo area but still be at/under the window line. this would give me a chit load more room to work …

has been fixed. thanks

Hello all my box is finished,carpeted ,tuned at 33hz... what is the best tune for my subsonic filter? my ampi is a DD Z1 thanks a lot

Ok, so my fully loaded 18" BTL should be here on wed., I want to get started on the box in the next couple of days. But I have no hands on experience with this sub, and I don't like relying on a computer program. So, I need to know what size box/tuning I should be looking at for it, all info listed below. 18" Fully loaded BTL, powered by an MA Audio HK4000D @ 1 ohm, so roughly 3500ish rms. I don't listen to THAT much rap, but still want it to hit the lows.I listen to stuff with a lot of double kicks, which I don't want to sound really sloppy/mushed together. So, cliff notes. BTL 18, 3500rms, and lots of double kick drums Also, PLEASE do not reply if you do not know what …

i have a 01 saturn L300 4 door. i pulled the back seats out and throw a bl 18" back there. now, im going to be getting another bl 18". this time the 2 will be in the trunk. how should i have the subs firing and where should the port be located. (firing). the backseats will remain out for my amp rack.

scott, i sent you an email earlier today on a sub project im doing. wanted to so if you were up to it. thanks bud! Damon

Can Fi recone this sub, it has a Tc9 motor with 3 inch coils. A guy over on ROE is selling one, it is only the motor and 4 spoke basket.

hi scott i have been trying to email you about helping me with a box for awhile and i would get a response either weeks after or no responses at all...I guess you are a busy guy so maybe my emails got overlooked but i have been trying to get box plans and a cut sheet for a box 3.5 cf tuned to 30 hz with the sub displacing .19..i have 31 width 15 high and 24 depth..i would like to use as lil depth as possible can you please help me? thanks oh and would it be possible to have like a picture with the demensions on it ?

I am selling my MD2, and I have a 40.1 sitting there for when my 2 other Q15's arrive and get installed. My questin is... If I am careful with the gains, is it ok to run only 2 Q15's on a 40.1(rated @ 3600w rms @ 1ohm)? Or should I just wait until I get the 4 pack installed?

i am wanting to get the most spl i can i order a BL 18 inch sub i have a rockford power 10001 mono amp i am having the jb fisher place design my box and i needed to know what the best cuft size they said that 8cuft would probably be the best but they said i might want to post on this forum to make sure thats best

remember the 4 15" BTL's you sent to me for the SM3-4 build? you wouldnt happen to have a set of specs for those do you? lemme know please Thanx Peter

Will 15" BTL's work in a ported box for DD 9515 subs. Port area is 165" per sub and port is 9" deep. This is what I was told to use for the DD subs. This is a SPL set up only. I know this is more than FI recomends for port area. Total box area is about 17-18 cubic feet.

What up everyone! Newbie to this forum!!! Just want some opinions on going sealed with my Q18s. I read a couple of threads on here were some folks are running their Qs in sealed enclosures and they seem to like it. Currently mine are in a 12.3cu enclosure tuned to 30hz and I pulled a 146 @ 39hz with it. Here a link to my current build http://www.*****.com/board/ind...?showtopic=3714 Vids http://www.*****.com/board/ind...?showtopic=8473 I've got good sq now but want better and I think going with a big sealed enclosure would do it. Want you guy's opinions! Thanks!

DO SSD 15 WORK SEALED I HAVE2 AND I WANT 2 GO SEALED HAS ANYONE TRIED THEM IN A SEALED ENCLOSURE YET? WHAT WOULD BE A GOOD AMP FOR THE PAIR

scott i have 3 18's but 1 only has 1(the other 2 are fine) of the voice coils that works, there d1 coils what should i do

My 12" Q should be delivered tomorrow according to UPS. I'm trying to decide on either a sealed or ported box to go under the rear seat of my Extended Cab Silverado. I've never run a sealed enclosure in my past 2 setups, and I'm skeptical as to whether I will be satisfied with the output of one. Any suggestions or opinions would be appreciated. Thanks!

What size and how many aeroports should I use? I'm thinking 3x6" ports for ~85sqin? Is this about right?

well im trying to plan my setup... already got it down to a fully loaded for daily driving BL 12inch subwoofer to go with my RF amp that pushes 1602watts rms.... the box will be around 2-2.5cubes after displacement... have to run all the numbers after i gut my current setup.... and well i plan on running my same box setup in my civic to have it front firing into the cabin... and well i have a slot port in my box but im wanted to rebuild my trunk setup and this time instead of having a slot port id like to use some aero port or ports..... want to use some 4inch aero ports for the setup.. BUT im always HORIBLE with calculating ports.... ive always had people run the number…

Is there like a list of subs that you guys can recone? or is it just american sizes? or what? Are there any rf's able to be reconed? or are they all foreign motors of some kind??<----T1's????? i want some ssd's soooooooooo bad but i need some $$$ and ive got 2 toasted T1's sittin here, jw wonderin if i can do anything with them instead of sending them to rf for $104 each plus shipping which is like $40 each, each way---- $400+ haha Thanks

Hello friends.... today i'll put carpet on my enclosure... but before ,i have just a last question for my box In fact i can make it a little bigger ..... actually 3.6 cu ft 33hz and i can go to 3.9cu ft 32hz.. is it a big difference? the low will be best with 3.9 cu? more outputs,SPL ? i'm waiting your answer... thanks a lot and have a good day Damien

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

thinking about running a second battery in the trunk. i was told there are two ways of doing this. 1, using a isolator and 2, running the + from the front battery all the way to the second battery and then ground out the negitive. are these both true? what should i do?

Hey i use to have 2 (dual 2)12" kicker cvrs running off of a zx750.1 now i have 2 (dual 2)12" FI ssds running of a zx1500.1 and my cvrs are louder then my ssds, the ssds are in a 4 cube ported box tuned to 32hz. My electrical is a 200a EA alt, Yellowtop under the hood. Ive got 10guage speaker wire, 1/0 power/ground wire. When i try to set the gains using the gain setting tutorial i dont get any voltage reading from my dmm so i try and set it by ear and the subs just stop playing when the subs arent moving that much. Im not sure whats going on. Im almost positive i hooked the subs up to read a 2ohm load i remember goin gfrom the positive from amp to positive to sub to posi…

I have been told the 12 ssd weighs 25 pounds, i was curious what does a stock 12" Q weigh? Just curious because i might get one if i can sell my 2 12" HCCA's old schools.