Fi Technical

Reconing my 15's to 18's. Plan on using 6 spoke 18" baskets, linear roll spiders, not set on cones and possibly a coil with a slightly bigger WW. Any possible issues I might see? Suggestions comments?

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

I am just trying to find the T/S parameters for the heat ring option. I am wanting to add it to lower inductance but wanted to know what the new inductance would be. Secondly I will be putting 3500watts to a pair of Q 15's and dont believe I would need any extra cooling options. I will add the chamfering option but being on a tight budget I will probably skip the Bp/cooling option and just go with the standard Q. I also wanted to know what the Mechanical Xmax is? I only plan on using these to Xmax and less but I do like to know all parameters of my speakers before pushing them. Thanks for any help from anyone.

I was wondering if you guys had the specs on the btl 15" fully loaded. Specifically the displacement after the 3rd mag', mounting depth, and xmax. I ran a search but no luck. How do I calculate these specs if I want to double the front baffle board. what are they afterwards. thanks for the help in advance.

Hey guys! as of a few hours ago, i ordered a 15" BL and a Sundown SAZ-1000d amp! I was just wondering how you guys think this will sound! and suggestions on my box. I want to make it ported offcourse

I plan on ordering a SSD 18" pretty soon and I'm attempting to make my own box. I'm only 16 and I'm not very good at math so if you guys could help me it would be greatly appreciated. I used the box calculator over at ssa and this is what I got. The 18" SSD needs 6-10cuft and needs to be tuned at 33hz, well I came up with some numbers and I got 19.5"H/ 36"W/ 18.5"D and after displacement that gives me 5.9cuft. And then it gives me the port length, area, and volume. (Port Length = 0.722 inches) (Port Area = 7.069 inches squared) (Port Volume = 0.003 ft cubed) What do I do with those numbers? I have no idea of how to tune a port or anything like that so I will need some he…

My first major build and I want to do it correctly, please point out potential issues. Just bought an SAZ1500d V.2 amp cause I found a smoking deal and couldn't pass it up. It's on a truck barreling towards my house right now Looking for a sub to pair it with and the Q caught my eye. Looks as if I add the cooling package to the sub I can pump another 200-500 watts into her which will align perfectly with the Sundown's output. Going Dual 2 Ohm coils and wire it all up for total impedance of 1 ohm and I should be styling. Only thing I'm still debating is whether I should go with an 18" or 15" woofer. The 18 attracts me for the sheer fact that it's an 18. It'll b…

2009 corolla, trunk i 13cubic foot.

Hello Guys/Gals, I was wondering if cold weather will damage a sub? Do I need to keep it down till warmer weather, or can i just let them wang? I live in northern Indiana and its currently in the teens here, so stuff gets brittle... Any help would be appreciated. Thanks.

Trying to figure out how to get the 3rd magnet option on the BTL.... I want to say I remember seeing it on their website as an option in the past --- has it become a standard? I only see the following options: Ohm configuration, p chamfer, cooling, hixm coil, daily or spl, induct heat ring, and the universal option. Thinking about getting a fully loaded BTL within the next month. Any help would be greatly appreciated. Thanks. Also, looking to get the AQ3500 amp w/yellow top up front, alt upgrade, along with big 3 upgrade. I listen to a lot of chopped and screwed music, so I think this setup would be perfect. C and S music isn't clean anyway - just good bass - so i'm not …

Hey all, I've got two 12" SSD's coming in the next few days and I decided to get a headstart on building my box. I've raped the search tool and can't seem to find what I'm looking for. If anyone has some spare time and wouldn't mind doing a fellow enthusiast a HUGE favor, it wouldn't go unnoticed. I'm hoping to get a cutsheet for 2 12" SSD's (ported) for my 2008 Mazda 6 sedan. Here's the preferred specifications. W: 42" (MAX) H: 16" (MAX) D1: 21" preferred D2: 16" preferred Tuned from 30-33hz I'm thinking it'd be cool to have the subs forward-firing at an angle with the seats. Then I could just mount my amp on the trunk side. The angle would take much more advantage o…

i am new in this forum so hi i was wondering if the fi btl's can handle 3700-4000 watts rms, daily?

hey guys, if i tuned a box to 26.5 hz would it hurt the sub? ik fi recommends 28 but i like it a little lower than it is now. so im gonna build a new box, and tune it to 26.5 if u think it would b ok. ne help would b great. thanx.

I have 4 fully loaded 18 btls in a 20cuft ported enclosure..dual 1 ohm subs.. I have the option of using 1 or 2 jbl a6000 amps to power them. My installer thinks that using both amps will blow the subs. He hooked up both amps and said the woofers started smelling. When he used 1 he said it was actually louder. I think he may be trying to save me from replacing subs over and over. Will using both of theses amps eventually blow the subs? If I get 2 more and put 3 on each amp will it see a 4 ohm mono load...something like the JL w7s? Thanks for any help

Hello everyone, Im looking for some input on new woofers. Looking to do two 12's in 6.5 cubes, ported to 29 hrz.(havnt designed yet) I am stuck between FI Q's and BL's I understand that its not entirely fair to compare specs of subs as there are many variables involved, but how does the BL's motor compare to the Q's? The Q having 28mm of Xmax and the BL having 19mm xmax. Is the BL's motor just much more powerfull? What are the real world diffrences and which one is better for my application? Amp is: 4,000 watts rms(1ohm). they will be wired down to one ohm

Ok, I am a ported enclosure built from pound that sound for 2-12" Fi Bl subs. I built a cardboard box like he asked as big as possible to fit in my trunk. It ended up being 39" wide x 13" Tall x 15" deep. This was sitting on the ledges on each side of the trunk and the spare tire hole being empty on the center. The box has to be dropped in from the top and has about an inch and a half gap on the top, and the side facing the rear of the car. Will this be enough space for those subs? I notice it asks for 1.8-2.5 per sub so I think I am a little small unless I would extend the bottom center of the box down into the spare tire well. HMMMMM?

Mainly for the bigger heavier 18 inchers but not excluding other sizes.I'm curious to see what you use.Bolts,screws,clamps etc.Do you switch from screws to bolts at certain weights and so on.

I have a 2006 Nissan Sentra (1.8L) that has the stock alternator putting out 80 amps. I am looking to soon be running 1200 watts RMS through the system. I know I will have to do SOMETHING with the electrical system. But what? New alternator? Extra battery? (Big three is a given) If new alternator, would the one in the link below be suffice? (20 extra amps) http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=120530973171&viewitem=&_trkparms=algo%3DLVI%26its%3DI%26otn%3D2&category=33573

Alright, vehicle is a 99' infiniti i30, 4 door sedan, I have two 15" Q's on a crunch 3000d-pro. The enclosure is 7.2 cuft after port, and displacement, tuned to 32.5hz. It gets pretty loud, but kind of a empty not real full sounding bass. The enclosure is built into the trunk with the woofers mounted invertedly, so that the magnets are pointed toward the back of the backseat. the port is firing out of the top of the box through a hole in the rear deck. It sounds like there is a lot of cancellation, and when I open the trunk and crank the system it sounds way better and hits the lows way better. I understand this is some sort of phase issue I believe, and have had o…

Hey I ordered a SSD 15 with both BP Power and Flatwound coils that I am going to be pushing 1000 watts through with a Rockford Fosgate Prime 1000-1d amp at 2 ohms. I was wondering if the box I have planned out with the RE calculator would work with my setup. If not, some advice would be appreciated.

Hi guys ! I was wondeering if can all help me out.. I purshased 2 12' Fibtl Fully loaded and after all I descided to try on with 1 first . I hoocked it up to a Hifonics Colossus XXV and wired it a 1ohm ...after like 5 minutes of playing time...the sub was working on and off. To me it looks like when it gets warmed up the sub completly stops working...but if I leave it cool off..it will work for a minimal amount of time. My amps never lost power and always stayed on. Do you guys think I blew the sub ??? or should I try to rewire the sub to a higher ohm ??? Thanks for all your inputs and help on getting my problem resolved !

Ok I have read many posts and I think its something I will need. The Q cant take 2000w daily I dont think. I want to run my Autotek mm2000.1. If I buy the dual 1 and run in at 2 ohms the Q will get 1500 daily. I dont really compete, just little local shows. I think that much daily I should probably get the BP option just to be safe. Does it take away from SQ with the changes that are made? Am I better off selling my amp and buying something smaller?

6 cubic foot ported box in the back of my 01 Jeep...Wondering about the size of my port and anything else that could help me. And also I was thinking about having a few circular ports...? Thanks for any help.

Hey guys it's been a while since I've posted on here and I just wanted to know what yall think. I've got a 2nd generation BTL and I'm thinking about selling it and upgrading. Which would be louder 2 BTL's or 4 X's both scenarios would be 15's? I know the more the surface area the louder but would the power make any difference in the application. Any suggestions would be helpful. Thanks

Good to go? More stats: http://www.subwoofertools.com/forum/ported...mp;Fs=&CE=0 Anything else to change? I'm gonna buy the MDF this weekend.