Fi Technical

ok i order a 15" fi btl fully loaded with a dual 2 ohm. i have been researching a lil bit and im confused.... i will be using a sundown audio saz2000d for this sub how do i wire the subto my amp ??? should i have order it dual 1 ohm?? im confused///

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 ??

Well im running my 15 q ported right now and ilike the way it sounds but i was wondering how many of u are running them in a sealed box? I know the ported would most likely get deeper than the sealed but i was wondering hwo much of a difference it would be sealed and what other peoples opinions on the q sealed are. I do listen to alot of rap thats why i went with ported. Was wondering everyones opinions on the ported vs. sealed. thanks

I have a 15" fi. I got it used. Idk if it's a bl or q. How do I tell?

So i have a friend who has two sp4 15's. He is trying to run them in a box that is roughly 4 cubes net after displacement. I keep telling him this is small for them but i could be wrong. His port is external. running it on a bc3500 Any recommendations to help him out would be appreciated.

What size and how many aeroports should I use? I'm thinking 3x6" ports for ~85sqin? Is this about right?

hi there i need some help with a box design. i plan on sealling off the trunk in my civic. i have a fully loaded btl. the box in it pounds now on highs. its a dual ported box not sure if its effecting more or less out put of the sub or not just wondering if a single ported box will be different its tuned at 35hz. i have a little over 5 cubes. i am looking for a single ported design with both the sub and the port firing forward. i plan on also doing competitions with this setup. i just got a new alternator coming and 1/0 guage wire. i am going to get a kinetics 16 volt battery or two depending on if i need it. but what box design would you recommend for spl and bass race.l…

Well, here's the deal. I've been running my 15" Q in a sealed box for the last month or so and I am wanting to build a ported box for it sometime soon and need help getting a design together. I have no problem building stuff, I'm just no good at getting something together that will be right for my application (right ft^3, right port size, cut sizes, etc.). Below is a pic. of the largest outside dimensions I can possibly go with. The 4" rise is to clear the tranny hump (it's going in an ext. cab silverado.) I'm wanting something tuned to ~33 hz or so. If anyone can get together a design for me, that would be great. Just send me a PM or reply on here and we can go into fu…

Since the board was wiped out not many old posts to search through. Joining the FI ranks and picking up a 15" Q for the GF's car. Trunk space is important to her so I'm looking at doing: 2.8 -3.0^3 @ 31Hz. Sub will be getting around 1000rms off a PG amp. She listens to most anything but country, so I'm looking for an all around good sounding/respectably loud set up. The few posts I've found most guys are using around 3.5^3, so anyone have experience with this sub in the smallest recommended size of 2.8^3? TIA...Mike

I am looking for more SQ so i figured i would go sealed. But since i have a larger space, should i go ported? I want tight-punchy bass, I like feelin some of the high bass. My current box is huge and ported, so i think this would be the right change (sealed). Thanks

Does anyone have plans for a ported box for a Fi 15" Q? It will be in the back of my 06 impala. I can post the dimensions of my trunk later, but any help would be awesome. I was looking for something tuned around 30-35 hz. Basically, I want something thats gonna really make my Q slam because all I really listen to is rap. Thanks.

Hello, I currently have 2 15" q series dual 2 ohm with the b/p option .I'm running these subs in a sealed enclosure and would like to try them in a ported enclosure of 4 cft tuned to 30 hz .However, the FI Audio site doesn't tell you about port length only port area. I was hoping i might be able to receive some help here.

hi, i am planning a new system and i have decided to give FI subs a try. so my question is how much RMS can a 15" Q really handle with the cooling, spider, and i ring heat coil? i was looking to throw 2200 rms at it. i also looked at the BL but its out of my price range and i want SQ. my last system consisted of 2 15L7s that i had on 3200 rms. they were rated at 750 rms each but were taking more than double in a 10 cube ported box, so im thinking these Q's can handle what i have in store for them. the sub will be going in a trunk of a crown vic. i know that fi subs are underrated but i dont know much. the amp will most likely be an aq2200d. as far as electrical goes i ha…

Hey guys, Finally ordered my Q, 15" w Cooling+Spider... so pumped! but now I have a dilemma I have ported box that is built to the specs of 3ft. cubed @33hz, but wanted to know if I will hear any audible difference by going to a 3.5cube @33hz? Is it worth it for the Q? Goals are just to have the loudest setup given my amp (1500d sundown), sub, and trunk space Just wanna know what, if anything, i would be missing out by keeping the box at 3 cubes thanks

i am planning to go with the following sealed box for a Fi Q 15".. would there be any issues with the sub being mounted so close to the edges? theres only 0.1875in. of clearance on the top and bottom of the sub/edge

I really need a ported enclosure design for a 15" FI ssd. since it is going into a pretty small trunk the sub will have to face upwards. other than that i have no clue on to which way to face the port, what size the box should be .....................if it helps my trunk is only about 15" tall, so my box really cant exceed like 14" tall, wheel well to wheel well cant exceed 30" and same for the depth. I would greatly appreciate a nice design for it.

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.

desperately need to know how much each woofer will receive @ a final load of 1 ohm..thanks all!im searchin through amps so just another option after u guys judge it.

hey guys , i recently ordered 2 15 Q's , am going to run them off of a single SAZ-1500D , with 1500rms to both subs. i want to build the box before the subs get here , and had to ask for advice i noticed on the Fi website that the recommended size for each Q15 is 2-2.6 CF. i can give each 2.5CF . will i get good lows? will i lose anything? not enough power to them? im not planning a LOUD LOUD system .. just loud and clear;) thanks. Eli.

Hey guys, I've been messing around with ideas for my subwoofer and I have a way maybe that'll help with my predicament. Currently, I have a 1995 Honda Accord Sedan and the 18" is to big I believe to fit in rear facing. Currently I have it horizontally mounted. However...after looking through some of the build logs, I am debating about whether doing a slanted box or not. My question to you guys is, what types of effects will I see of this? Ideally, I wanted to do it rear facing. But i dont think that will happen. So i've compromised with it angled. it will still be around a 5 cu ft box and about a 60 degree angle the subw ill be mounted on. Any big difference you guys thin…

This is the graph i got from WinISD volume is 5.4 port is 4* 8 * 11 (dont know if thats the right port size or not. I would like it tuned around 32Hz) http://i235.photobucket.com/albums/ee29/mld42/FiBL.jpg This is a very rough sketch of the box to show where the ports could go. The sub with be mounted inverted for more box volume. I have 2 12's now in a sealed box, but would like something louder, and I have a BL 18 dual 2 that im not using so I am trying to fit it in my truck. http://i235.photobucket.com/albums/ee29/mld42/Blbox.jpg And is there any way to extend the port out of the box rather than porting the inside. I havnt seen this done so I dont know if it wil…

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

my buddy has a 18 btl the old style 3 mag. we took it out one day and the tinsel has been slaping on the spider and put holes in them. the box its in is 4.5 cuft and tuned to 32hz with 1800watt on it. i glued some t-shirt on the spiders hoping it will help my main question is does the recone come like the new style with the tinsel under the spiders?

New to Fi and just picked up a 18" btl. Need some suggestions on box size and tuning. I have about 10 cubes gross before driver and port. Looking to do a sub up, port back, tuned to maybe 35hz with 4k of power. A few have said that these have tremendous bottom end so I'd like to tune appropriately.

Its almost time and Planning has started. I still need to find out if I can make a slot port work if not maybe two square or even aero ports. Suppose will have to do some maths and cross-checks. Draft box (not to scale) Let me know what you think.