Fi Technical

I cant decide wether to go sealed or ported with my 15" Q...I listen to mostly rap and want good sq bass but at the same time so good loud hard hitting bass...whats your guys vote?

I have looked through pages and pages of forums and cant seem to find anything explaining what the purpose of the space spider on the sp4 is. could someone please help?! i ordered a sp4 yesterday with the space spider and would like to know its significance.

Hey guys, Just wondering if you think I may have made a mistake with the 2 15's I am trying to squeeze into my car, I have a decent amount or room to play with... but do you think I should have went with 2 12's instead? Or do you think I should just throw the power at em and let it ride... My box will be around 8 cubes. My trunk is actually around 17-18 cubes, it's just that it has a tiny opening... do you think there will still be enough room for the air to move around in it... Thx Josh

Just yesterday listening to my system, and my sub went out. I checked all the wiring and nothing looks loose. And I don't think I blew it because there was no smoke when it went out. Is there an easy way to tell if it's blown or not? Or if anyone might know what is wrong here, please let me know. The sub is a 12" fully loaded BTL that I bought this summer. Any answers or suggestions are greatly appreciated. And if there's anything else that you need to know, feel free to ask. Thank you.

Hello, I am new to this forum and the proud owner of a new dual 2 ohm Q12 with BP option. I am looking to build a ported box for the sub tuned to the recommened 32hz. I would appreciate some help with the design. The sub will be powered by a Soundstream PCA1500D. I will most likely run the sub at 4 ohms for a while until I upgrade my Big 3 sometime this summer. I would like the box to be a slot port with rounded corners somewhere in the range of ~2 cubic feet. The box will be made out of 3/4" mdf Box outer size (max): 12.5" tall 30" or 32" wide (can't recall the correct measurement right now) Depth is variable So far my calculations have brought me to the following: …

So i am using my 15" Q for a home theater sub, 12cuft tuned to ~12hz or so. It is a monster on only 1000 watts. Through reading allot on subs and linear tech im wondering how the Q's coil is setup, underhung/overhung, any linear tech, shorting ring, and if there is anything special about it? Im more or less wanting to compare what i am listening to and what its tech is compared to what some people are using. I have to say though that the Q in my enclosure is a pretty amazing experience. just need to get maybe another 500 watts to it and some way of keeping my house's voltage stable. thanks!

What's the best way to solder the tinsel leads onto the terminals with these new recones that have the leads coming out of the spiders. There are 4 lead wires for each positive and each negative. I think its obvious I won't be able to fit them through the ring on the terminal, so how should they be soldered? Should some slack be left?

Doing some box designs and wanted a little help on picking what hrtz to tune the box at. I read the post from Fi about tuning and it says anywhere beteween 30-37 hrtz. I will have around 8.5 cuft for each sub and wanted to hear some suggestions on tuning. The enclosure will have the ports facing twords the rear with the subs mounted on the top side of the enclosure. I listin to mostly rap music and want it to be loud as it can be. The subs will be pushed by 2 Alpine PDX 1000.1's for now, but down the road will be pushed by 2 PDX's on each 18 1 on each voice coil at 2ohms for a total of 2000 watts to each sub. Thanks, this site has helped me alot so far, the best sit…

Will I be doing a great injustice to my Q10 by only have 600 on it? It will be in a .6 sealed box. Amp is an Arc XDI600. I was trying to sell the sub but cant seem to get it sold, and am tired of it sitting around. So I finally decided screw the weight gain and am going to put it in my T/A. Thoughts?

Just would like some info on how to tune my box correctly. I see these "port calculators" all over the Internet and wonder if they're even reliable.. I'm looking on making a slot port about 12.5"high x 4"wide. The dimensions of the box are 35" wide, 14" high, 20" depth. (outside dimensions). Thanks in advance

I currently have a fi btl 15 fully loaded and i planed on using knu konceptz 8 gauge speaker wire but when i tried to wire the sub up the wires were too big haha...so is there anyway i can make the wires fit ive looked at banana clips and wire reducers but i dont know what to use and if it will distort or loose power

I have 1.0 cubic feet before displacement and it is a sealed box. I am wondering will I be able to get a 12" in there with adding polyfill and make it sound good or should I stick with the 10". I will have a sundown sae1000d powering either one.

so this sunday, at a local comp i heard rumor that a guy was using a BTL N3 for a daly setup. I ended up seeing his name on the record board and couldnt believe it was true. The guys setup was a 18" N3 box 5 cubes tuned to 35hz, and he metered a 150.7 outlaw in a SUV. i was most impressed. I had the thought that the n3 could NOT play music daily, untill i heard his tonight. It sounded very good. i messaged nick immediately and he got back to me within a couple hours "as usual" and notified me that they can play music, BUT that him and scott believe the motor force is too great and will actually decrease SPL. so in other words you guys, the n3 can be played daily, however …

Does anyone have a contact number for them?

I have 2 12" Fi SSD's with copper coils coming soon and I need a box for my Charger and found this. http://cgi.ebay.com/2006-Dodge-CHARGER-SUB...%3A1%7C294%3A50 Would this box be ok to use or should I have a shop make one? I also found a ported one http://www.onlinecarstereo.com/CarAudio/Pr...ProductID=21319 I mostly listen to rap but also listen to rock, death metal, etc. if that helps

* Rated RMS Power = 200 watts * Mounting Depth = 4.25" * Outside Dia. w/gasket = 8 5/16" .........(inside the lip is 8 1/8") * Inside Dia. 7.000" * Sealed Box: 0.280 ft^3 w/ F3 of 50 Hz (Qtc = 0.707) * Ported Box: 0.60 ft^3 tuned to 30 Hz F3 of 25 Hz * MSRP - $99 T/S S4 **: RMS: 200 Re = 3.37 ohms (4 ohm nominal) Fs = 34.9 hz Qes = 0.5323 Qms = 6.93 Qts = 0.4943 Vas = 7.6 L BL = 13.3 N/A Mms = 127.7 grams Cms = 162 um/N Xmax = 12mm one-way linear (70% BL method) I made an album with measurements of anything I could think of that you may need to know in order to find/build a recone kit for these... I'll need maybe 12-14 of these. thankyou!~!!…

I was wondering which setup would fit better. i currently have a kicker 750.1 and i was planning on gettting a fully loaded 12" duel one ohm sub and running it at 2 ohm. I was wondering if that amp would be enough. If not then I plan on getting a fully loaded BTL 12" duel one ohm sub and running it with a Lanzar2000D. Thats supposed to put our 2000watts @ 0.5 ohms CEA rated. Which setup would work out better?

Hey guys, sorry if this subject has been brought up in the past. Search engine is not working well for me. I am getting a 15" IB being built for me and want to mount it properly. I am going the T-nut route but do not know what size screws to get? 1/4in enough for 3/8? I dont even know what size the holes are in the sub frame. thanks for your help! Ralph

so i want to keep as much of my trunk as possible, so what im woundering is. My old box was like a perfect square, if the new box is the same cubic feet, but more rectangle than square so it will stay in the rear of my trunk. How will that effect the sound?

Hey i have a fi q 15 dual 2 and i have it in a ported box about 3.25 cubes tuned to 33hz and i wanna try to make a 4th order bass reflex box but i havent the slightest idea how to make one. i know its more math but i havent found a how to go on how to make the and which formulas to use to calculate the box sizes and ports. Im pretty good at car audio but i just need to get pointed in the right driection on how to make it. A local car audio installer whos a wizard with boxes is trying to teach me how to make one but he is just too busy right now to help me with my box.

Alright, so i finally have all the pieces together for the btl. Alternator, battery, amp, wiring, ect. So now to this whole... building my own box thing. i would prefer around 32hz and 7.5-8 ft^3 before displacements for sub and bracing. I have 3/4 inch MDF (its actually 11/16ths). So one question is how do i brace it properly? And... i need box calculations for a standard Sub facing up, port facing back of vehicle design. I really like Mac n' Cheese's idea of coating the inside of the box with resin, i might do that. so 7.5-8 cubic feet, 32hz, and the dimensions i have to work with in the back of my explorer are 44.5" wide, 25" tall, 22" deep. Maybe 30" tall if it make…

Hello I have a ssd12+bp running off a Alphasonic 1200da at 4ohms. Rms is 1200 at 4 ohms BUT my electrical system is stock so with around 50-70 amps at 12.5-14 volt I believe Im only getting 550-700 watts to my sub. The 12 is in a slotported box with 1.6cuft tuned to 34 htz. I built the box for 2-12 so they each have their own seperate enclosure, but I can not see another SSD 12 in the near future cuase times are tuff. My question is this- If I build another box for my 1-12 at say 2.3cuft with a slotport tuned to 32 htz, what do you guys believe the difference would be? more SPL? I really would like it to BOOM harder, louder, higher spl. Im not into SQ so if that goes down…

Hey, I'm wiring a 2ohm DVC Fi Q to a Sundown Audio SAX-1200D. Being a monoblock amp I don't know how to wire this properly. I've checked quiet a few of the websites with wiring diagrams but none of them are showing how to hook up to an amp with double connections ++ -- All they show are mono or multiple channel configurations. Currently the sub is wired following this diagram http://a248.e.akamai.net/pix.crutchfield.com/ca/learningcenter/car/subwoofer_wiring/1DVC_2-ohm_mono.jpg Looking directly at the side of the amp with speaker connections, brackets = [wire] [+] + [-] - I think with the way I have it wired that it's running @ 4ohm. The goal is 1ohm.…

Me and my friend are about to hook his car up with some Fi subs. We are unsure of what really seperates ported from sealed and how power makes a big difference. Right now we are lookin at 3 Q 10's sealed, 2 Q 12's ported, or a 12" BTL ported. Q's will get 1k watts each, the BTL 3k to 4k watts. We listen to everything from heavy metal to rap. What we are lookin for is a rough idea of how each of these setups will differ in every aspect. I know it sounds like a lot and we are grateful for it. He says he may wanna compete in something with it later, so that is something we need to keep in mind. Any help or suggestions would be great.

So i got my 15Qd2, and it seems to be running pretty warm. No smoke or anything, just that when i get home from banging on it a bit it feels a little hot. Just got it two weeks ago so not sure if it's still just from breaking in, which i'm thinking not, or maybe from low voltage?? It's running off of a fosgate p1000-1bd and the gain is just over half and under 3/4. My lights do dim a lot when it hits. There is a little smell, but smells more like breaking in smell, not vc burning smell, hence no smoke and when i took it out a few days ago vc still looked brand new. Basically, any thoughts on getting the sub to run cooler?? I'm thinking this could become an issue if p…