Fi Technical

Recently I built a box that is 47 x 22 x 22 with the port slot it all comes out to about 9.3 cubes, i was wondering if any of the gurus could tell me if that entirely too much volume for 1 18" bl daily driver?

im looking at the hifonics bxi2607d amp. Its rated 2600 watts at 1ohm. From what i have heard ( and also from personal use) the bxi line is over-rated by about 200-300 watts. This amp is a little different from the other amps in the bxi line. For one, this is the 2007 model. Also, this one is strapable. Does anyone have experience with this amp? I want to know if this amp will be able to push a loaded 15" btl and sound good enough doing it? i dont think im going to get the $40 cooling, just the $10 one. I am going to run it off of a 140a alt, 2 batterys (one of them a yellow top), and do the big 3. I also plan on using a 5 farad cap. I read a thread on roe that they are u…

I have an 18" btl in the mail it should be here tomorrow, I totaled my truck a few days ago that it was going to go in so now I have to put it in a 98 mitsubishi eclipse for a month or so i'm looking at making a box L34xH24xD17 wich I think is about 6.9ft cubed so I would need about 75 square inches of port. how do I tune it to 32hz?

I am about to purchase a single SSD 12" to pair with my Rockford Fosgate T1001-bdcp. The amp is 1 ohm stable, but the birth sheet shows only about 50 more watts when compared to 2 ohms. May I please ask whether you recommend going d1/serial to 2 ohms or d2/parallel to 1 ohm? I will be going with high QTS/sealed and cooling (personal preference). Thanks!

What is a good program to use that can help me put my idea on paper? I want to have a setup with two sealed drivers in the back of my blazer (15/18 still undecided). I want to have them stacked like an 8, except I want the top one to be inverted this will be in a fiberglass box painted black with lightning airbrushing. I just wish I had a program that would allow me to rig a detailed example of what this would look like.... Thanks

39" wide 18" deep 22" tall 1.5" walls 4.5 box volume 76sq" of port 32" long port tuned to 34hz With available space, I'm tuned a little high (it's a big interior, peaks around 40hz)...and I'm lacking port area. Should I go longer on the port to get lower or should I go longer and wider and keep the tuning freq (or possibly let it raise)?

I am looking to build a slot port box very similar to the threads that are very recent in the forum. My dimensions are slightly different and I want to flare the port walls which will complicate things. My dimensions are: height: 14" width: 30" depth: variable tuning freq: 32 hz box volume: 2.3 cu ft subwoofer: FI Q12 Dual 2 amp: Soundstream PCA1500D Like I said I would like to flare the vent sides by cutting slits in the MDF and bending it. I have made some test bends and they seem to work out pretty well. I have read that adding the flares will require an additional 1-2" of port length. I can add the additional length that is required for the flared p…

This is my first real system and I plan on running 2 10" FI Q's with a Sundown Audio SAZ-3000D. I have plenty of experience with woodwork, but since this is my first real system where I'm building my own box, I need some help with that. First off, originally I was planning on facing the subs inside the car and seal off the rest of the trunk. It's a 4-door and I can't really remove the back seat, but the majority of the time the back seat is down anyway. However, after reading a bit more I've heard a lot of people mention and tests done to show the subs may actually be louder facing the rear of the car. What do you guys think the optimal setup in my car will be? I'm drivin…

Let me know your thoughts My dimensions are as follows: Height- 15 Width- 35 Depth- 21.5 Port Dimensions: HV- 13.5 WV-4.5 LV- 24.75 35 hz tuning... Should wang?

Guys, I was wondering why some people go outside the recommended cubic feet from FI for enclosure size? I am thinking because its vehicle specific or is there another reason? I have seen guys running 4 BL 12's in a 13 cube net enclosure.

Hi everyone. I've been reading up on Fi Car Audio and in particular the Q series of subwoofers. I really can't wait to start getting my cash together for one of these bad boys. However I have a small knowledge base problem. I don't understand the exact effect of a larger box volume for a subwoofer. In particular I've read that the recommended box size for a sealed Q 15 is 2 - 2.6 cuft. Now, would the subwoofer get louder if the size was 2.6cuft vs 2cuft? There is more air to be moved in a 2.6 vs a 2 correct? But if this is true then would there be any other effects of having a larger box beside the obvious space consumption in the trunk? Bonus question: I listen to a lot …

ok i have a 15" fi btl with a sundown audio saz2000d. i built a box (3/4 mdf) with 4.5cubes of air space after sub displacement. i have it tuned to 33hz,(slot port) it sounds pretty good, i think , loudest sub i have ever own lol... im just wondering if it wouldsound better if i seal off the port and add some round flared ports ?? any thougths ? ideas ? sorry for the stupid question... please sum help... should i leave my box alone ? build a new one ??

Hey i was wondering if you guys could recone a Rockford Fosgate HE? I cant find any recone kits.

a single 15" MT in a 3.25 cu ft enclosure with 130 sq in port area and very well rounded interior of enclosure or two 15" MT's with only 50sq in port area in aprox 4 - 4.5 su ft of box volume assuming same amount of power is used peak frequency is 49 Hz if that really matters

i sent my woofer in for a recone and spoke with nick via email briefly, but havent heard a response in a while. i need to get the sub back asap, im not sure how much to pay them for it with shipping to 85259. if anyone can contact them via phone, that would be fantastic as i would love to have the sub back by thursday or friday for a road trip. i know its 75 plus shipping, but im not sure how much the shipping is and if it can be back to me by then. he said it can be done within a day if need be. Thanks, anthony iocca he can reach me at 480-648-6785. my email is down right now.

In order to get a 1 ohm load out of the 2OHM DVC, I wire the two negative terminals together with speaker wire coming out of one of them, and both the positive terminals with speaker wire coming out of the same set that the negative came out of right?

you guys think a 10 cu ft box ported tuned anywhere from like 30-34 is alot? i was talking to a guy about him builing me a box casue i dont wanna get into making one. he said around 10 cu ft. tho its also going in the back of a suv. but do you guys think thats alot for just a single 18 bl running off a hifonics 2k watt.im not gonna be giving it to much probly arounf 1200 to 1600 its got pf chamber and cooling -thanks

i emailed Fi SIX months ago askin about gettin a recone, and well im still waitin for a reply. i think i sent a email to nick, but cant remember. who else can i get ahold of to get a recone?

this box is for a 12" bl and its gotta fit in my 99 acura el (honda civic sedan for you americans) my link let me know what you think.

iam having a prob with designing my port for my box can anyone give me some ideas on what to do i already used the speaker boxtunning calc but it didnt really help me

Hey guys girls just wondering before i tear the system outta my tahoe and redo it which box will be better....the current box is for 2 18" fully loaded BTLS...ea sub has 6cuft after displacement and tuned to 32hrtz...but would it be louder deeper etc if the box was 1 chamber tuned with both subs..kinda like steve meades...just wondering.....also running 300amp ho alt (soon to be 2) big 3 all 0 gauge 5 batteries 2 US AMP MD-3D 1 on ea sub....let me know if im forgetting anything thanks

Hello again, Now it`s the time for some SQ after some flexxin` (ex: and hihi ).After 6 months of BoomBoom and re-listening to some local SQ cars(some brax users, scanspeaks, focal, microprecision etc) I bought from a friend (who upgraded to microprecision) a set of Focal 165 K2P woofers and HybridAudio L1 Pro tweeters and an Alpine 9835. Now I`m sounddeadning my car, especialy my front doors with 1layer of SS Damplifier Pro+Spectrum Sludge+Damplifier+OverKill pro. Amps: HAT L1pro: Zapco Z50S2; Focals: Premier; Fi Q15: US Amps XT4000(1500W@1ohm load). What enclosure should I build for an SQ setup....a 2cuft or...2.5-2.6 cuft? The subwoofer is behind the front stag…

i have designed a 7 cft enclosure for an 18 btl. the volume is with woofer displacement. how do i calculate a port to 30 hz then? is this ok?: 4,72" * 19,69" * 29,92"

does anyone have a blueprint that I can use for a single FI Q 10'' tuned between 28-30hz?

How much can these take cuz my saz-1500d is feeding them pretty well but sometimes it sounds like they can take a bit more power...???