Fi Technical

What amp is recommended for two 12 inch BL? I would like to not spend more than $400 but still get a great amp. Also what wire should I purchase for the hook up and also for the big 3 upgrade?

Hello, I am new to the forum. I just purchased 4 Fi X12's on sale from Fi. I was wondering what kind of box I should use with them. I would like ported for more air movement. The Fi website does not have any recommendations for the sub besides the size of the box. "sealed= 0.9-1.3 Ported=1.6-2.2" cubic ft. I was looking for some kind of calculator for port size and what frequency would be good with these subs. They are going in a 1990 GMC Sierra ext cab w/removed back seat. they will be in a straight line. Should I enclose each separately or all in one enclosure with one port? Any help would be greatly appreciated. Thanks.

Okay so Fi' s website says 1.75-2.5 Cu ft, but ive heard or read on here that they require a lot of airspace what does need to be at? Looking to order enclosure soon so help would be appreciated!

I have 2 FI BL 12's in a 4.23 cubic ft custom enclosure. The enclosure is tuned at 33hz. Is it possible to play below tuning? Also i cant seem to find anyone to set my gains properly so i will i know if i am clipping?

(1) sp4 18 vs (2) bl 15's Going to be run most likely by a hifonics Brutus 2400.1 amp with custom box. Will be used as a daily driver and I listen to mostly rap I'm just curious to hear some input. It's going to be in a Toyota camry so a closed trunk if that makes any difference to anyone. Thanks

Just wondering what is a good box calculator that is user friendly?

Alright so I am trying to build a box for a Fi Car audio Q 12" woofer. They recommend I build a box using 1.8-2.5 cubic feet @ 28-33Hz (32hz tuning is optimal, and has the most output and is still the most musical daily driving), and to use 12-16 square inches of vent area per cubic foot of volume. I am talking to Chris at fishercustoms, and he is helping me design a box. I was using the RE Enclosure Calculator, and I'm not sure what he uses. I gave him my max specs, 23" long x 15.5" wide x 16" high, and he came up with: 1.8 cu ft, 33 hz, 1.74" x 14" port ( 13.53 sq in vent area per cu ft) When i put those dimensions into the RE ported enclosure Calculator, i got: 2.068 c…

I just received my fully loaded 12" Q with high qts option. Was wondering if anyone has been trying or testing sealed enclosures and has some recommendations/tips? I love lows. Had an 18" Q tuned to 28hz for a while but the box is just far too large and heavy for me. Im thinking of building it 1.5-1.75cuft while empty and putting some poly fill against the inner walls... not sure how the box size is affecting the woofer's output exactly.

Today i finished building my box for my Bl 18. Its 9.5cuft with 146sq in. of port tuned to 33hz. It is going to go in my back seat of my 1984 cutlas supreme. My amp is a AQ 1200. Anybody got an idea of what i should expect with this setup? any comments are appreciated

how does this look. the sub will be in the trunk firing into the cabin with the port as well I'm also debating between the sundown 2500d and the audeque 3500 to run a 15" Fi btl at 1 ohm my electrical consists of at the moment optima red top up front optima yellow top in the rear, big 3, 0 gauge through out

i have the fully loaded btl, in jus 6 3^4 cu ft box tuned to 34.78 and theres no doubt about it being loud, and rumbling things BUT i am not able to do a hair trick. there is very little air being moved around. is this normal? or is the box to close to the hatch, and not getting enough air? my brother has the 9515g and we put his box n sub in my ride and it moved air like crazy, but the btl isnt move any. any ideas why?

Anyone have a cut sheet, layout, anything? Daily driver/demo. Musical setup.

hi.. i was bought one fi 15'' btl before 1 week. today i unscrewed it to see how it is.. and i see the spider had a cleft.. can somebody tell me, it is serious and how can i fix it? thank you Uploaded with ImageShack.us

Im going to try and be brief.. since I'm at work. (One of the very few sites I have access to!) I used WinISD to play with output numbers. Of those, I valued port velocity::frequency ratio. And I tried to configure a flat response bandwidth while keeping my desired tuniing @ 29hz. Quick specs: 1. Its a trunk build ( 4 door camry) 2. substage amp VFL 150.1 3. Rear firing design // 15" SP4 with electrical to boot. 306A - 274A alt (Hot). 306A Peak (cold) . 178A Hot @ idle I can post more details on Port volume later, I left the last dimension of port length at home. But what your seeing is port depth 17.25, height 15.5, length is somewhere between 26.xx to 28.xx. I cant …

I am planning on building a 4ft^3 for my BL 15. I was just wandering what size my slot port should be (Length, height and depth) if i want it tuned to 33hertz?

I've built boxes for at least 15 years. But, i've never built a ported box like this. This box is gonna be 31.18 cubic ft 52 in wide x 37 in tall x 28 in deep. Trying to figure out how to fit all the subs and where to put the port. My guesstimations on the port size would be 15 in x 20 in and port length would be 8.13394050 ??????????I put the width and height in on a port calculator and it comes up with this length. What is that? I don't understand the length part. Don't even know if I can make a port hole that size with those subs in there. I was thinking of slotting the port either at top and bottom or on the sides. Sides would be better i'd have more room. I've ne…

I know that Fi recommends ported for BL's, but for space reasons, I'm wondering if I could do a BL in a sealed box with one of TCSounds PRs (passive radiator). This will be running off an USAmps 4000DE (1600wrms). For space reasons, my plan was to go with a 12" BL in a sealed 2.5cf box, with a TCSounds 15" PR (or VMP as they call it) http://www.parts-express.com/pe/showdetl.cfm?Partnumber=293-682 http://en.wikipedia.org/wiki/Passive_radiator_(speaker) For those too lazy to click on the PR link "Passive radiators are used instead of a reflex port for much the same reasons—to tune the small volume and driver for better low frequency performance. Especially in situations i…

Hey everybody, I have two 12" Fi SSD Dual 1-ohm subs(copper coil option only) in a ported enclosure being pushed by a Hifonics Bxi-2608D. Last week, one of the subs completely stopped working. No noise at all. I took both of the subwoofers out and tried swapping them to the other sides. Still, the same subwoofer doesn't work when wired to the other subs wiring. So that tells me that it's a problem with the sub itself, not the amp. When I push in on the sub, there is no grinding or anything of the sort. It's identical to the working subwoofer. Everything looks fine physically. So I tried hooking it up to a multimeter. One of the voice coils reads 1.1ohms, the other gives…

I have 2 btl d2 will the mmats hd4000.5 work with those subs. I readed on this forum a person was useing a mmats amp and it kept going into protect mode

whenever i plug in or out my mp3 player into the stereo my Fi Car Audio SSD 12 makes a pop sound .. so when i was playing my music i gradually made the volume louder then all of a sudden the sub will pop and start this loud humming noise.. i dont think i blew it because i played it again and it sounded fine until the pop and humming sound came again

What are some specs on the ufo style btl 18"? As i cant ind them on the fi site. It was built in 2009,fully loaded dual 1 ohm,got it from a guy that never used it,still in the crate..my main question is what is the xmax on this style btl and are these still in production?? Any input is greatly appreciated..thanks!!

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!

I am thinking of using a single IB318 IB in my trunk. My trunk space is 14.2^3ft. The vas of the driver is 381l which is nearly the same volume as my trunk. Is the IB318 too big for my trunk to run IB? I have read that the overall volume of the trunk space should be three times the vas of the driver(s) in an IB setup.

I guess my original post got lost, but was looking for some help with my choice of amps. I have a 2000 Nissan Maxima, and I have one BL 15 now and I want to get another one. So for 2 BLs I know I will have to upgrade my amp. I dont have a HO Alt, so the SAZ 3000 would be out of the picture (right now anyway) how would a SAZ1500D push 2 BL 15s? what other amps do you recommend? All name brands are welcome. Also how much do HO Alts usually run? Thanks

so I know you guys like a lot of details with having a picture on the problem but im not to a stage with a whole lot yet. But I was wanting to do two square ports on the lower corners of my box that i'm going to be making and the thing I was curious about was how to add up the separate ports on torres. if I wanted two 8x8 squares would that be what I put in and add the total length or would you put it in as one 16x16 since that is the combined port area