Fi Technical

I'm looking at upgrading my subs in the near future to a 15" Q. Could someone give me an idea on the outer box dimensions so I can see if a 15 will fit in my 1994 Mazda 626. looking for about the 4 cu. ft. net tuned to 30-32 Hz. I'm limited to about 17" high by about 30" wide. I assume with those dimensions I'll likely have to go with the sub facing up. Is there any potential problems with this? If it doesn't work out with the 15 I'll have to get a 12 instead.

Well I just recently bought a Q and since I was eager to listen to it, I put it inside the only box I had. The current box is a sealed box with about .9 ft^3 after displacement. Since its on the smaller side I threw some polyfill in the box as well. Now I want to build a ported box and I honestly have no clue as to where begin. I read through several pages, and found some plans but they don't suit my needs. I also searched online for calculators and only came across the RE calculator. I don't know how accurate it is but it kind of gave me an idea how port length affects tuning frequency. I'm a little tight on space and have a maximum of 30"w x 16"h x 16"d. Matter…

i understand the high QTS option is for sealed setups, but has anyone throwin a Q series with the high QTS in a ported box? how did it sound and would you see a problem with doing this?

The box I'm building is for a single Fully loaded BTL 15. The design i came up with has the following specs: 4.5 cubes after displacement and bracing, tuned at 32hz with 64sq/in of port. My goal is just a loud ass daily ground pounder. My question is just does this box seem too big/small, and is 64sq/in too much port? thanks

scott or nick, or anybody else that knows i have a question. i have two 12's that i bought in germany and being the dummy that i am i dropped the box they were in and one of them completely broke the basket all the way around! the woofer is still good i was able to line it up and push down and the voicecoil isnt damaged all the surround and wires are still attached. the speaker looks like it has almost the same basket as my fi 12's is it possible to take the woofer and replace the basket so i don't have to buy new woofers yet?and if so can you guys do it? or can only certain speakers be re-attached like this?

The link above wont work for me. Does anyone have the recommendations and where the options are explained.

I was told I can wire this in series to achieve 2ohms. But when I looked up a diagram for the wiring, it didn't make any sense. can someonen post a link of a good diagram? The amp is rated at 1200 watts @2ohms. rms. I figured this would be a perfect match for the Q. Thanks for the help.

ok so my brother wants to get a fully loaded 18" BL for his 00' blazer. hes got a stock alternator i think 105 amps, and hes thinking of getting a hc1800 battery in the back with a hifonics xxv or xx thor amp. will his electrical be okay for this?

hey, i have access to some ED Ov.2 motors, and was thinking it might be a good start to recone. Can a drop in recone kit be had for this sub? the vc is 62.5mm which is right around 2.5 in. I would like something inexpensive and sq related. i read in previous threads where the older e12k (desjil) was reconeable for like $60 or something. Let me know! thanks, brian here are the specs for the O: http://www.edesignaudio.com/edv2/product_i...;products_id=35

Hallo from greece. I want to know how many litr do i want for two Q 15" to play deep bass at 32hz???What power RMS can handle 2 of them together??? Thanks.

Could you recone a FI SSD with a FI Q or BL recone? If so is there any advantage or difference?

I am about to build a new box for my bl and I wanted to know if it would sound better with the sub facing up and the port facing the back door on my jeep or have the sub and port on the same side?

I sent an email asking this but never got a reply. I was wondering if i could seal up a SSD 15? If so what would be an ideal size for the enclosure? I checked the specs under the SSD section in the sticky thread but all i could find was "we are still testing sealed enclosures" etc. Thanks.

ok guys i have a RF BD1500, birthsheet 1740 @1ohm, would 2 12" Q's or 1 15" BL be louder?? or is it possible for that to move a BTL a sufficient amount?? and also could you tell me what options to go with please and finally if i get a duel 1 ohm, does that mean the amp sees it at .5 or 1 ohm? and the duel 2 at 1 or 2?

ok so one night i was sitting around thinking up some new box ideas. i really want to have my sub facing forward into the cab of my car, and have the port be on top of the subwoofer. so i was doing some concepting and came up with this, Box idea. I just want to know if it will work. i forgot to put notes so.... notes: 1. double baffle front plate 2. round port edges 3. 2.8 ^3 feet of airspace after all displacement 4. 3/4" mdf or particle board used. its going to be firing forward with the trunk sealed from the cabin. thanks, Anton Miller

I was just wondering if pictures and/or cut sheets would ever be available on the forum. At the very bottom of the Pinned BTL Enclosure Recommendations Thread it says that "Pictures and cut sheets for some enclosures [are] coming soon," however that has been up for many months now and I was wondering if they would ever be up. I just got my 12'' BTL reconed and am wanting a more simple design this time for my box, however I have not found any actual standard recommended designs posted up by Fi, and was just wondering if they would ever be made available. Thanks

The 15 inch BL box recommendations are (BL 15 – Ported box we recommend using 2.8-4 cubic feet @ 28-37Hz. Again use 12-16 square inches of vent area per cubic foot of volume) Im not exactly sure what size and hz i should tune my box to. I have one 15 BL fully loaded ment for daily personal use. Any recommendations on what will give my the best bang for my buck?

I recently totaled my car, so I'm selling the system to my cousin. He has an Explorer and where they're from, loud is the only thing that matters. Anyway, he's been entering in comps with two JL 12w6 on a old punch 500(or somethin like that, not sure the model). I have two FI Q 12 with Bp power I'm selling him, along with a Rockford Fosgate T20001BD. Size is not really a problem...he has the entire back of the explorer to fill if necessary. I'm just looking for a big box or whatever will get the job done to throw up big numbers and still sound decent. He said he put up like a 141 Outlaw with the JL's. If that's right, gotta put that to shame to show everybody whats …

how big of a box should i build for 2-12 btl? It will be powered by 2-40.1, i was thinking 4 cu at 35hz bad idea?

Hey guys, I am new to these forums and new to Fi. What i was looking at over the past 2 weeks is that in order to power these subs, you need to require a) cash b) automotive parts c) More parts Lets just stick with b), Now i was looking at some of the earlier posts, alot of them were for the Iraggi Alternators. I myself have a 95 Honda accord. I Like it. I obviously need a new alternator if i am going to get myself 2 Fi subs. Everyone is going for the Iraggi Alternators. I myself can't find one anywheres on the internet. I checked eBay and all they have is 60amp. I am pretty sure 60 amp wont compare to a 2500w amp. So i came to the professionals, you guys, for some ad…

Hey Scott, I tried emailing you about some recones I need. I tried the [email protected] but I got a delivery failure notification today. Does your email no longer work? Please let me know how I can get in contact with you.

This is tuned to 36hz THIS is tuned to 32hz The 3 round ports are 6inch by 16.75L

Does anyone own a 94-97 Honda Accord Sedan? And if so, do you have a 15'' BTL Sub? If by any chance you do, could you tell me how you made the box for your sub? 5 cf is a lot of space, and my trunk is big but I dont know if its possible or not while still keeping the back 2 seats in... Thanks, -Curt

ok i plan on running 2 SSD 12's off a AQ1200D @ 1 ohm. the box it gonna be roughly 4.4 cubes depending on how much the aeros take up for space. what would you guys suggest for aero size? i know i would need less port area for aeros then say a slot port but im not sure how much less i can use. i was thinking 1 6" aero which would give me 28 sq inches of port area (6.27 per cube) or i was thinking of going with 3 4" aeros which would give me 37 sq inches of port area (8.69 per cube) now i know thats less then the recommended port area for slot ports but i was wondering if either of those would be acceptable for aero ports.

hi all i have been planing a blowthru on my 01 tacoma using two fi q 18s and two soundstream trx2000ds. now i have come up with a few ideas for a box but was wondering if there were any pros out ther that would like to offer up some advice. i was thinking of having one sub on either side with a center slot port ond a combined volume of 22 cubes tuned to 28 hz. also i have heard pete from ttb has some great designs but he hasnt gotten back to me yet thanks