Fi Technical

I was considering a trade for 2 BTL 15s ( Single slug, spaceship motor), but the subs only have the cooling option. I am going from 4 SA-12s, and I like my lows. I'm powering them with 2 Audiopipe AP3ks. I was gonna run them in 3.5 per (7net), and tune between 30-33hz. I listen to alot of rap, low bass music, and I really want to be able to play in the high 20s/low 30s with authority. With just cooling, will these 15s be able to produce like I want them to? I'm only getting rid of the SAs to do a forward firing/sealed off setup, and I can't get 4 12s to fit in a blowthrough. I also wanted to see what FI was all about Thanks for any help

Here are my details: 2007 Chrysler 300C (Huge Trunk) Fi Q15 (With BP option) Cadence iA7 (1000 wrms @ 12.8?, 1200wrms@ 14.4) Big 3 Wiring Upgrade Listen to primarily Rap/Hip Hop & R&B Q#1- How far below the tuning frequency of a ported enclosure can you listen to a sub without causing damage?? Q#2- I love very deep, low bass! I was planning on a box 3.5-4 cf ported, tuned to 28hz. Is setup going to please my needs?? Q#3- Should I have went with the BP option with my power available?? It is free right now, so I figured it couldnt hurt.... right? I cannot wait to hear this setup!! Anyone posting 140db plus numbers on a single Q in a trunk?? Thanks for your help!!

whats the most power you could safely put through a btl 18 loaded, and not blow the coil? im just wondering what some have tried and found to work where as someone might have tried ____ and blown said sub.

Hi, I am currently having someone build me a box and they are looking for a cut-out template to cut the hole for the woofer. I gave him the cutout diameter but he wants a template to be sure. I can't seem to find one on the website. Do Fi offer one?

I am very curious on this one. About how tall would a box have to be to fit a 18" BTL forward facing in it. I am curious cause I wonder if I can get it in the bed of my truck or not. I don't think I can, but am curious none-the-less. Thanks

to whom i can talk to about dealing this product " fi car audio" here in our country? i already emailed it at [email protected] but still no one's answered , hope some one could talk to me about this. thank you very much

I plan on running to Fi Qs in a sealed enclosure, using the minimum recommended volume due to space constraints. My power is a Zapco c2k 9.0 4ohm version. I can run the amp bridged or in stereo, so that opens up both the dual 1ohm and dual 2ohm voice coil configs as options. Since I intend to run sealed, I plan on ordering the high QTS option. So here is the dilema: I noticed that the T/S parameters are different for both the D1 and D2 ohm cofigs, and I imagine that the high QTS option further changes the T/S parameters. With that in mind, does anyone have any thoughts on which configuration would behave the best installed in the smallest recommended volume and usin…

My tahoe was rear ended a 2 weeks ago destroying my BL 18s. I had just purchased a RF T2500-1 and im awaiting my second. I have an Avalanche now and i want to run 3 dual 1-ohm BL 15s. My question is will the two 2500s be too much power for the BLs? Also, is there any problem wiring the subs in a "single voice coil per amp" setup, ie: 3 subs, 1 voice coil on one amp, one on the other?? Im kinda new at do-it-yourself car audio when it comes to complex wiring, so any help or advice, good or bad, is welcome.

I am looking to build an enclosure for my 4 12" fully loaded BL subwoofers and was wondering if 8 cubes after displacement and everything is large enough or too large? I want to tune to 32hz as well. Please chime in with any ideas if you have them?

So this is how much room I would like to use, but I have more room if necessary (I need some trunk space :laugh:) My dimensions are 33x21x17 and here is a picture with how what space I would like to take up. Just post your input on if this is good or if I should add more space for the box and how much! This should be around 6.817 cubes without any displacement. (btw this picture isn't mine I just googled what an 05 equinox trunk looks like, and no those side panels do not come out) hmm for some reason the picture came out a little blurry, but I think you should get the point and for the height I can also do up to about 21 inches so if i wanted to mount the sub back i cou…

Hey guys I'm getting my plan's ready on my btl n2 18. I already have my amp to power it(hifonics for now). But I'm still deciding on the box plans. I'm doing a ported box tuned to 33hz. I want to do the box perfect and to spec but I'm having a hard time calculating the bracing and how thick I should make it for safety. Any advice would be appreciated thanks for your time

Hi everyone, first time poster on this forum. Posting all the way from Australia. Okay, So I'm in the planning stage for a system in the new car, and I've just started doing up some rough design/placement ideas on Inventor, when I ran in to a problem. I'm designing this for a Fi Q12 ported, and I know the recommended enclosure sizes given by Fi of 1.8-2.5 cf @ 28-33Hz. However, that is quite a large margin of variation for a recommended enclosure volume (0.7 cf and 5Hz tuning frequency can affect the sound a fair bit). As I'm not a massive fan of guessing/speculating about the best enclosure volume, I decided to pull out the calculator and the old loudspeaker design coo…

I have 2 mtx thunder 7801d amps and was wondering if that is enough power for 1 of the Bl 18's? If yes what options should I choose for the Sub? I know I'm going to need the daily option for sure, but after that I'm lost.

Can someone answer this question for me; I see that they offer a lot of upgrades, but each one will affect the parameters and driver's behavior. It would be nice if they offered updated parameters and more information on each of these upgrades. Adding mass to the assembly, then adding spiders and changing spider packs, changing coil assemblies, and materials etc, does quite a bit to affect the driver's behavior, from altering moving mass and resonant frequency, causing QES changes, and inductance variances to causing shifts in the CMS curves... All these things really affect the driver's behavior as a whole, the way it will sound, and they even affect the enclosure design…

is it ok to trace around the inner black gasket ring that comes with the subwoofer to get the size for the cut out hole?

What is the lowest amount of watts to feed a 12" Fi Q and still get decent/good performance? I'm shopping for an amp and want to see what my options are.

Anyone have any experience with FI Q 4th order bandpass boxes? I'm thinking about doing one for two FI q 12's. I've heard they really help to eliminate trunk rattles when you port them through the deck. I have 2200 RMS to work with.

I want another t-line in my truck. I had a dd 9515g, it didn't hold up. I will have 3kw on hand. What options on the 08 model BTL would get where i want to be with suspension, cooling, and power handling, as well as x max........If a combination of stiff spiders was needed then that would be ok as well. I just don't really know how well they will handle this type of application. It a 2006 nissan frontier(the big ones) xtra cab so i have a decent amount of room as my backseats are removed. advice will be appreciated. Jason

i need a custom enclosure if anyone in here stays in cali n builds them hit me up i need an enclosure(ported) for my 2 FI SSD's

Would you guys suggest tuning a BL 15" to 28hz? Has anyone tuned their box for one that low?

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

The car is a 2001 chevy blazer(SUV). I dont want to take up my whole cargo space for this single subwoofer. I dont know wheather to go with sealed or ported, what would be the pros and cons. Would anyone know an estimated demension size(hight,width,dept) i would be expecting to get with either ported or sealed. THNX alot

I have a 12" BTL with pole chamfer and my Memphis MCD2500 amp is coming in soon. I want to get everything ready so when the amp arrives I can install it right away. This is my mustang 2004 stock electrical: 130-amp. heavy-duty alternator 540 CCA heavy-duty battery Battery amp hours (58Ah) Battery-rundown protection I will be doing the big 3 wire upgrade with 1/0 gauge wire from batt to alt to ground. Besides that, what else should I invest in? I'm trying to keep it as budget as possible. Thanks. PS> This is my daily driver.

Well i just ordered 2 12' Fi Bl Thursday, and well which leads me to a off topic question how long will it take to actualy get it in the mail if i live in texas, and well i was wondering if anyone has a blueprint or something so i can make a box out of it...

Both setups will be run off of a Sundown Audio 2000D amp. I only have a space of 1.1 cuft per chamber to work with. I mostly listen to rap and want these subs to be able to lit the lows well.