Fi Technical

i need a box design for 2 18" btls. i have enough trunk space but where the port and subs would fire kinda confuse me. the dimesions of my trunk are 27x42x25. would that be enough to run 2 btls with port area? can you even run the btls sealed. i never see anyone talk about sealing them. please help cause i am tryna purchase these subs and keep it movin. hallelujah holla back.

i will be buying 3 12" q's in the future with the bp option but was wondering what VC comes in these, the site just simply says 3" 4 layer coil. is this a flat coil, or a copper coil or what, i was reading the coil options listed and it would seem to me that a copper coil would be best in this with it being a SQ orriented sub, but correct me if i am wrong. Will be running these off a Sundown 3000d on a daily set up that will see comps ocassionally wired in a series/parallel combination to right at 1 ohm. FI guys prefered on replies as i am looking at thier view point being that i know they know thier products better than no one else. no offense to anyone else there so pl…

whatup folks. i am going to run a second battery in my car i know that 0gauge is the best but can i get away with 2gauge? i already have the whole car wired with phoenix gold pos and neg 2 gauge. would hate to have to buy all new wire if i dont have too. i am only running us amps 400, and esxq404 four channel amp with soon to be ssd 12's with copper coils. im thinking this would be okay but im not sure never ran two batteries before. sorry for all these questions but i m just now realizing that as loud as my systems have been i could get more out of them since ive found forums like this to help. thanks for any help you guys can give.

Ok so i have a FI BL 15 Fully loaded powered by a Sundown SAZ-1500d. Ok so anyway when i play some music loud i hear some weird sound like the sub it bottoming out but i know its not becuase its not moving enough to bottom out.

I have 2 12" Fi Q's and im probobly going to order a subthump box for them, because I hear subthump makes one of the best prefab boxes for Camaros and Trans-Ams. However, these boxes only have a total of about 2 cu. ft. and after diplacement that would only leave me about .85 cu. ft. per sub. These boxes dont take up the whole rear well though, so if you guys think it would be worth it, I could cut out part of the bottom of the box and add some space down there. Thanks, Ben

I am interested in two 12" BTL N2 dual 1 ohm with all options and daily coil. I have 3300wrms available but I will set gains accordingly. I would like to keep the enclosure as small as possible but within an optimal spec. What is the recommended enclosure size for my setup? Thanks edit change of plans

I have a 15" Loaded BTL that is in 4cubes. The box is .75 MDF. I will rebuild the box, should I doublewall anything other than the front baffle? I will probably resin the inside of the box, as well as brace it at several places.

ive been using subwoofertools.com to help me figure out what my dimensions are going to be, but i have a problem. My max dims are 36x24x12, which correct me if im wrong is 6 cubes. but i cant ever get the depth to be close enough to 12 inches for it to work. id like the box to be about 4.5 cubes at around 34 hz. the closest design ive come to is 4^3 at 34hz, but that is with the xmax part at 16... im really frustrated right now.

The ssd 15" does 21 mm xmax. How did you guys get 27 out of the Q15" with only 200 more rms? Also will it be alot louder then the ssd 15"? Its going in a ported enclosure.

i have 2 woofers that i had bought from Brian Owens off of CA.com that wer crossfire motors with a fi basket & BTL softparts. i had an issue with one of them before and emailed FI and got a fast reply and they fixed it and got it back to me within a week. well i have since torn the spiders on these woofers and contacted to get them reconed several months ago but got no reply. i just let it go and they have been sitting for awhile. well i sold 2 of the motors and ordered BTL recones to do it myself as i have done for other production BTL's before. well im not sure if i ordered the kits for the wrong series of BTL's or what but i did one and messed it up somehow the coi…

ok someone told me before that if they were standard 3" coils then they could be reconed. well i got bored and ripped on of my blown T1's apart. outside of the coil is 3.204"-3.244" and the inside of the coil is 3.020"-3.051". bent a lil bit, maybe from removing it. how much would it cost to recone? how much power would it be able to handle? would i just be better off buying ssd's? thanks. p.s.- any more dimensions needed ill see what i can do, its kinda hard to get into the basket with a 6" dial caliper . but ill see what i can do if ya need me to. the gap in the motor is approx. .145"

How would i wire this my friend told me to get the dual 1 ohm and he knows what he's talkin about but the amp is rated at 1000 rms @ 2 ohms. Can someone tell me how to wire this

I just picked up a 15" SSD and everything else for my system other than the box itself. I have got no idea on the tuning frequencies and port sizes. Can someone help me out. Ive got about 30W X 18H X 116L room in the back of my truck. Would a prefab box sound okay? Thanks in advance

I used to get Chris @fishercustoms to do my box designs but their forum is not active much and Im not sure if he still does them. Who else does designs, need for 2 FI BL 18's in a wall in a 2012 scion xb

hey hey i just got one of the re xxx 05 model and scott i emailed u about a few things such as specs and a 18" top end lol the 15 just dont make me happy so i wanna convert it to 18 anyone know how much this will cost? my buddy john Mulcahy told me to ask scoot cuz he was the one that designed these subs

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.

i need some help designing a box i have a 1999 explorer xlt 4 door i am running a 18"btl fully loaded daily on a fusion nv2500 my current box is 19h 24w 33d outside dim. with 2 6" pvc ports 15" long. ports and sub firing at hatch. i want to fire sub up and port back and change to a 30x30x16tall any help on port LxWxH would be grate!also any other input just looking to change up i was told sub up port back would be louder.

Does the cooling option effect the performance of the sub? like does it make the sub quieter or anything? i read the flatwound coil makes a sub prone to peak so what does the cooling option do?

Is the BP option really for people who want to compete? I'm looking for SQ in my 15 Q i'm getting. Is it something I should get or for people who just want to compete>? Thanks. Jess

I might buy a new dust cap for my sub i mean yeah it'd look odd but yeah this one i have is horrible. How much is it to buy one and how easy is it to put on? Also is it possible to just ship my sub to FI to see if they can recone it completely? Its a 4inch coil and idk the ID of it yet. Thanks Joe

Can it be done to extend the gap limits?

Guys Prob havent post for over a year now, thats because I have kept all my things in the closet and lost touch about car audio while playing mafia wars LOL. My question are: i. How long does a sub magnet stays magnetize? In my place 33c-35c is considered a normal sunny day. ii. Does heat from the sun + heat from playing music will effect the magnet strength? iii. Does keeping the sub in the closet (its bare and I didnt put it in the box) will have other effects like rust, deterioration of rubber, spider getting weaker etc? Btw I own 2 15Q's which I bought back in 2007

I've got a Q15 with BP Power in 4 cubes @ 32Hz with 58.5 sq. inches of port powered by a Sundown Audio SAE-1000D in my grand marquis, and I want to try a new enclosure. This is a trunk car and the seats do not fold down. What were your favorite enclosure specs for the Q15?

with a box at 27x21x27 what size port would i need to run a 18"btl at 2000 watts? this is just the available area for the box. with displacement it puts the box at 7.13ft^3. and i am using 3/4 mdf. or would it be better to run both btl's in the same enclosure and port it. if so the box would change to 27x42x27. what port length would be needed to run it at 32hz?

Before i purchase the new baskets and recones i would just like to have some info or how to swap the motors from my 12'' q's to the new 15'' baskets? what kind of tools will i need and is it easy to do?