Fi Technical

I am running 2 FI BL 18's in about 15.5 cubes after sub and port tuned to 32hz. It sounds awesome for daily and really picks up the lows. I have about 200 square inches of port also. I did 147.3 db on TL first time, then a 152.4 on an audiocontrol meter saturday. Now, I was told I should make my box around 10 cubes after sub and port and tune to 35 or 36hz and it would probably meter better and still pick up the lows. Does this sound right or do you have any suggestions? Oh yeah, I am running 2 sundown audio saz-1500d's strapped on them now. Would it matter with a slot port or are aero's better? thanks for any help

I have a 15 inch q with bp already, and I need a second one. Just wondering if the parameters will still be close enough that they can share an enclosure and be alright. The new and the old.

what is the smallest sealed and ported box that i can use to put 2 ssd 18's in.

Got my bl today, went to bolt it into the box and noticed that the holes in the gasket don't go all the way through. I can see the holes on the bottom then the lip that comes off of the surround goes over the whole and blocks it. Do i drill through it?

Ok so my Q stopped working an i tested the coils an the left one reads 0 and the right one reads .8 i think it wierd that just one coil would burn or be messed up. Anyone have any input on this.? Thanks, Teddy

Well I just had a box made for my 15" BTL and they kinda messed up...first they made the woofer hole facing up and the ports facing up also....do the ports facing away from cabin sound louder? Also i found out that the box is tuned to around 29hz....how will that sound?????? Will it sound good..will it be loud most also? I listen to mostly all rap just to let people know (i know rap sounds better in different boxes hz wise)...The box is around 4cuft also just to throw that out there. Help is much appreciated thank you. Here's some pics. Inside...one of the ports.

Hello scott or nick, I need a Recone for my 18" Fi BTL. Its Universal, daily, loaded. I need A Dual 2 ohm VC with the HiXmcoil, shipped to 53597 (I hope Im the only one with a BTL in Waunakee ). Let me know what I need to send you, and where to send it to. My Email is [email protected] or PM here. Thanks - Shelby

Anyone know the "Le" parameter of the Q18 dual 2 ohm sub? Thanks for any help.

I was wondering if this box would be big enough for two 15" fi btls. The box is 38 length X 25 width X 23 height. After displacemnt of everything its around 7.5 cubes at 31hz. The port is 6 wide and 25.5 long. It would be for daily use and each ran a sundown 3000d. thanks for the help

I was just wondering if anyone knew of any good car audio shops in Ohio (Columbus would be best) that have worked with Fi audio before and could do a custom wall for 2 12" BTLs and probably 2 TD20001 r/f amps. I like competing in meca's car shows (SPL) and i don't think i should do the box like originally was going to. Thanks

does anyone know right off what diameter the sub cut-out is for a nice tight fit thanks

I have two ssd 15 inch. im building my own ported box. i cant find any dimensions. i want to have a single box, technically two separate boxes inside with a divider. can anyone help me with some dimensions

i currently have a crossfire vr 2000d and an optima yellow top with a kinetik hc600. running 0 ga from the battery then 2 ga from the kinetik to the amp. im currenty upgrading the "big 3" and am looking at an alternator around 200 amps or so. is that enough upgrade to feed that amp? the type of subs i was looking at are the FI BL15's which are 1000w rms and also the RE AUDIO sx15's which are rated the same. also if anyone would recommend an enclosure not only for daily but for comp. as well....probably somewhere along interchangeable ports

Hey guys I'm getting four btl 18's the UFO magnets. I need help with building this box my max size is 48w/30h/49d I wanna be tuned aroun 30hz.please someone help me out

Does anyone have 2 of these beast in there truck so i can get some ideas?

I just got a 1998 blazer (4 door) and transferred over my Sundown Audio SAE-1200D and 12" BL from my 99 grand am. The box is 2.5 cuft AFTER sub and port dislacement, tuned around 32-34hz (can't remember exactly off the top of my head) I have upgraded the BIG 3 with 1/0ga wire, ran conduit along the frame rail with 1/0ga to the amp. In my grand am I LOVED it, but now in the blazer it seems to be lacking... not sure what exactly, but it doesn't seem to rattle my noggin like it did in the grand am. My question is should I look at building another enclosure that would work better for the blazer? If so, how many cuft? tuned to? how should the sub and port face? Or is the blaz…

Im currently using the RE Enclosure calculator (http://www.reaudio.com/speaker_box/LPort_Box_Calc.html) and after putting in the dimensions I can fit in my trunk and Im playing around with port size and what not and I was curious, the "tech" section on the Fi site says the recommended tuning is 33hz, I can only get my box to fit if I tune it around 34hz, is this an issue? would it be better to be lower than ideal if you cant get the ideal 33hz like 32hz instead... Or am I not even gonna notice? Also, again refering to the "tech" section, for the 10s it recommends 15 square inches of vent per cubic foot of air space, is it a major issue if I can only work around 12 square …

what's the best enclosure volume for single 18btl powered by saz3000d?

What sort of rules apply when constructing a ported enclosure. I know the basics like tuning and port dimensions. But do subs need to be spaced a certain distance appart to be effective...? Things like that! Cheers

since some of you knows very well this product i though it might be a good thing to ask before making a choice... i got a btl 12 that will run on a soundstream tarantula trx2000d... ive done the big 3 and im wondering how to maintain a constant 14.4 load to my amp?? plus a need a box desing. im gonna be using this sub daily for mostly hip hop and got a mazda protege 1999 with enough space in the trunk . i also heard that a square box aint the best option since the sound produced by the woofer would hit the back panel then bounce back troughout the cone area and produce distortion(by the way sorry for my english im french) is it true???? and thats about it thanks for you…

Hey guys and gals, I have been slammed at work with all our new server upgrades and 32 new users that we hired, and I am the only network admin for a company with 55 inhouse users, 2 servers, and 21 remote users(<---- the worse part, remote users). I have gone through all my email and Im's, if you have sent either to me, and it hasnt been responded to, please resend and they will be done promtly. Thanks Shawn

I have a pair of 10" BL's. I'm running these with an MA Audio HK4000D, I've been running it at 2 ohms so they'd get about 1900 watts each. I'm planning to drop the ohm load to .5 and send them more power, at least 2500 watts each. What would the recommended enclosure size be for this increased power? I'll figure out the ports and such after but I want to know what size enclosure would be right for that amount of power.

My buddy is trying to put a 18" fi ssd fully loaded in the back of his eagle summit van.. He has about 1200 watt rms of power to run the sub.. There is two different set of max dimensions we can use ( it all depends on how tall the box will actually be. The first set is a tall narrow box and our max dimensions are 27 1/4 tall X 39 wide X 15 Deep. And the other set is 20 1/2 deep X 39 wide X 21 tall. Any help would be wonderful... Would really like start build on box as soon as we can.. Also I would like it ported wit a tune right around 32 hz. And I not sure wat would sound best wit the speaker direction and port direction so any advice is wonderful.

Hello I'm new to this forum as i have just purchased a used Q18 " sub and i want to get the best from the sub for my suburban, i listen to rock and rap and i want to make a ported sub enclosure for it, sub up port back. my question first is could anyone help me design a enclosure with the best tuning for all around use? i love the lows but i would like it to not only go low but have a punchy bass aswell. if anyone could help a Fi newb with this it would be much apreciated. thank's i'll give specs of the area i have to work with, 47w 24d 22h ,99 suburban using a fosgate t5002 pushing aproximatly 800 watts, my goals are just a daily driver setup with good sound quality. an…

any box builders out there wondering how much you charge for a box for 2 18 BTL FL, flared port, 13ply birch, 5-6 cu a piece shared chamber. dimensions would be 52 width x 20 depth x 25 height that would be my max dimensions give or take a few in. Another guy (Ryan Wallace aka Belunt from CAJ.com) was suppose to build me a box, but i cant get in touch with him now, and im trying to get a refund. but someone let me know something. thanks