Fi Technical

I just picked up two BTL 18's, dual 2's, fully loaded, and will be running them off of two modded Memphis Mojo MC-2000d amplifiers (1 on each driver at 1 ohm), approx. 3000 watts each. In my vehicle, which is a 2007 Toyota FJ Cruiser, I don't have a whole lot of useable space to work with and still maintain practicality, so the enclosure is going to be a bit tight for specs. I will run the subs inverted to try to save as much airspace as I can, but I only have a total of 11.2 cubes to work with, before port displacement. I will be able to run 4.7 cubes per driver after displacement, while running more than sufficient power to the drivers, at 3000 watts per. Fi recommends…

Scott / Anyone I had emailed Scott about this but I'll post here. Basically my questions is as below. I would like to seek help on my Q15 enclosure. I had builded a 3.65 cu.ft @ 34hz for the Q15. My specs and measurement as follows: Net Volume: 3.65 cubic feet Tuning Frequency: 34 Hz Port Width: 5.25 inches Port Area: 86.625 Square Inches Port Length: 47.5 inches External Dimensions: 34 wide x 18 tall x 22.75 deep Now, after installing and basically setting the amp crossover, subsonic filter and gains I found that the bass was muddy at times and lacked the lows. So I checked my amp setting even using scope just to make sure it does not clipped or distort. After listening…

i am toying with the idea of either a ported 10Q or a sealed 12Q. overall i want SQ, but want it to get loud. i listen to mostly rock music and really enjoy a good jamming bass line. i am a sales rep so i spend alot of time on the road and due to needing the space for samples i don't want a box much bigger than 1.5 cubes ( MAX ). my question is this- i already have the AX600DE-- is it enough to drive a 12Q sealed? i know that at 1 ohm it will drive 600W ( on paper ). the amp is extremely efficient, but will it really drive either Q? this is more of a question for Scott or someone with experience with Fi. i am not a newbie by any means- i am just looking for s…

lately i been noticing a popping sound coming out of my BTL. I got it hooked up to two hifonixs bxi1606. is this normal?? have any of you guys with btls heard this before??

Can I get a recone for 2 jl 12 w6's? My boy just smoked them and gave them to me. The only specs that I could find was, 300 watts rms, 2.5 inch coil, 11.1 xmax, and they are dual 6 ohm coils. And the dust cap comes with the recone? And what would be the new spes with the recone?

How loud will his be, haha. No but seriously - I was considering purchasing the 6000D because i can get one for only $100 more than the 4000D. I was going to use the 4000D for these 3 10s but hey, why not go with this one, you know? I am not going to deliver that much power to these subs, that is the point to this topic because i will not have the battery power to support the 6000ds potential. The question pertains to the BL's cooling option- Fi says as long as you do not burp the subs then the cooling option is fine for daily. I am planning on setting the amp up to output a real 4,500w(peak spikes) as if i were to have no voltage loss. Sometimes i show off setups usi…

INFORMATION: I own a 2002 pt cruiser. I am going to soon be buying a Fi Q18 and a AQ1200D for my car. I have calculated maximum external volume that the enclosure can be and it is around 8ft^3. I will upload some pictures tomorrow but its dark outside so I can't go take any pics. Two Options: 1. Sealed. Would allow me to downsize the box a bit to around 6ft^3 and give the sub some more breathing room. 2. Ported. I would keep the volume at the max and port it to 28hz like recommended. My only concern is that the space between the Q18 and the rear hatch is 4 inches. I know this will affect the sound but I don't think it will be too big of a problem. So what shoul…

Is there any way I can reattach this myself? This is basically what I opened my trunk to:

The inside of my box is 11.75H x 20D x 37.5w I will be using 3 4" Precision Port I cant change anything because the box is almost done and its waiting for the subs to get here. If someone could tell me how long the ports should be to tune to 32 thats what I need to know. Thanks guys

Just Got my car finally! OMG! YES finally.... ffs Vauxhall (Opel) Corsa Sxi Twinport 3 Dr it is... now i have an Fi Q 15" which im going to go sealed and will be making a new enclosure in the workshop soon, thats sorted, going to get my self a sundown 1000 amp.. now i was just wondering about wiring products, http://www.knukonceptz.co.uk/productDetail...?prodID=KLM-AK0 http://www.knukonceptz.co.uk/productDetail...?prodID=KAR2-6M http://www.knukonceptz.co.uk/productDetail...rodID=KAR124BLS http://www.knukonceptz.co.uk/productDetail.cfm?prodID=ANL200 and some form of terminal cup for box i just want to know if this will/should cover everything to get my sub up and pumping …

Im thinking about trying to put 4 BL 15s in a 2000 maxima, Do you guys think its possible to fit them in the trunk and only the trunk?

Hey guys, can someone with knowledge I don't have give me a hand PLEASE! I'll be real grateful! I bought my 2 10" FI D2 Q's for this box for my 350Z which has a advertised inside dimensions that produce .70cuft per chamber. Scott's advertised cuft spec for these subs is .20 -.60cuft. So I'm about .10cuft over. First a couple of questions. (getting old sucks....memory shot! LOL!) #1. I think Scott said he wanted the .20 - .60cuft space for the box PRE sub installation???? So in other words don't use the sub displacement itself in the final cuft #. The box without the sub should be .20 -.60cuft. Does that sound right? #2. Obvisously I want the BEST possible performanc…

First post here at SSA. Looking for some help, I need to build an enclosure for my new sub and am looking for some help on a design. I can give up 34.5w X 20d X 15.5 OD max. I'm looking to get tuned to 32hz @ 2.5 cubes. I am going to be starting this build in the morning any help is greatly appreciated. I can't wait to hear this thing come to life. Just looking to get some help so I can visualize what I'm building. I will mess around with some numbers on Torres and try to post them up. It will be going in a Toyota Corolla and running off a crescendo s1500.1 so 1500w. Mostly hip hop music is what I listen to. Also, I work out of my car and have to use my trunk …

im building a sealed box for my sp4 to see what it sounds like. is it as simple as just making a 23X23X22 box out of 3/4 and a couple lengths of all thread?

My first major build and I want to do it correctly, please point out potential issues. Just bought an SAZ1500d V.2 amp cause I found a smoking deal and couldn't pass it up. It's on a truck barreling towards my house right now Looking for a sub to pair it with and the Q caught my eye. Looks as if I add the cooling package to the sub I can pump another 200-500 watts into her which will align perfectly with the Sundown's output. Going Dual 2 Ohm coils and wire it all up for total impedance of 1 ohm and I should be styling. Only thing I'm still debating is whether I should go with an 18" or 15" woofer. The 18 attracts me for the sheer fact that it's an 18. It'll b…

hello guys, im not writing much on this forum but i will introduce a lil bit, im dbwesz from holland. and do music competitions in holland. im runnning now 4 Rockford t30001bd's on 2 re audio mt 18's in a 400 liter enclosure (dont know how much that is in cu ft SORRY) tuned on 28hz port frequentie. im doing on a TL 157,4 db peaks on 42 hz ( car freq ) on music song ( lil john what u gonna do ). i have a couple off vids standing online on youtube ( also vids of olderbuild i had like 3 SX 18's etc) and coulple of car alarm and house tricks. TO THE POINT!!!! i want to make something new now. in europe we are not realy like in amerika. our boxes are most of the time tuned hig…

I see a ton of pretty designs floating around was wondering what people were using. I Googled it but they all "calculate" various specs and I'm looking for a drawing program? Photoshop seems a little excessive for this. Wanted to draw something up and have you all take a look before I get all my pieces cut but the sub hasn't shipped out yet so I've got some time. Thanks!

Im going to be starting my first build soon and i've decided to go with the Fi X12 but I was wondering if you guys have any suggestions on amps for this sub? I want to squeeze every bit of power out of this sub Thanks for any suggestions! Sub Specs SINGLE 2 | SINGLE 4 OHM Fs: 35.6 Hz | 35.8 Hz Re: 1.9 Ohms/coil | 2.9 Ohms/coil Qms: 5.58 | 5.55 Qes: .47 | .47 Qts: .44 | .44 Mms: 127.9g | 126.1g Cms: 1.6mm/N | 1.6mm/N Sd: 481cm^2 | 481cm^2 Vas: 50.7 l | 50.7 l Spl: 88.7dB 1W/1m | 88.8dB 1W/1m Bl: 10.8 N/A | 13.2 N/A Xmax: 18mm | 18mm Rms: 400W * | 400W * Sealed box: .6-1.1 cuft | .6-1.1 cuft Ported box: 1.6-2.2cuft | 1.6-2.2cuft Sub OD: 12.500” | 12.500” Cut ID: 11.125” |…

I have 1 15 BTL Fully loaded, i was playing it today and it started smoking then went out. I have it on a Orion Hcca 5000, the gain was not up it was below half way, i wasn't playing it for a long time, i don't know what could be the problem. I have heard that Orion amps are hard to tune, i dont kno what the HPF ,and the LPF is suppose to be set to could someone help me.

Is 2000 watts enough power for a Fi Q 18? Also I was wondering what would be better in my Dodge Ram Quad cab, its going to be inside the cab. 2 Fi Q 12's in a sealed box with 1.2 cubic ft per chamber or 1 Fi Q 18 in a sealed box with 5 cubic feet Thanks

Hi ive been running my 15" Q in a 2.2 cubed box for over a year now with a SAZ-1000d mono amp, and its been awesome! now making the boxes isnt a problem as i designed and built my last one! but im looking for something different and maybe a bit louder without changing much and spending alot! so i thought ill port it! i looked at the cut sheet in this section for the 15 ported in here but its slightly too big at 3.8 cubes and was wondering if anyone could adjust it to maybe 3.2-3.4 cubes for me :/ being a complete noob with port sizes and stuff! max height is about 17 1/2" really! Thanks Pez! sorry for being a pain

Hey guys I'm running (2) 12 btl on 4000rms tuned at 35hz. My low past freq is set some where between 75hz-80hz but no high past filter.I ordered an pfmod adjustable subsonic filter but I'm not sure should I set it at 30hz or 35hz. I would have preferred setting it at 33hz but it not an option on the filter that I'm useing. Fi recommend setting 2hz to 3hz below enclosure tuning thank guys.

I have a Fi Q 15 with BP power in about a 5 cuft box. 3.5 for the sub and the rest is displacements for sub and port. I have the box tuned to 31hz. I read the recommendations for the sub off of this forum and it says about 12-16 square inches of port area per cubic foot of volume. So that would translate from 42in-56in squared of port cross section and i have about 48 inches squared (its 13.75in W x 3.5in H x 36in L) and not very much air is moving through the port and it is not very loud. Maybe it needs more break in time? Thanks

Hello guys, So I need some help with understanding what is going on with my trunk. I had a bmw sedan E36 style, 2X 12" Qs and a RF T15001d... I open the trunk the subs are not distorting what so ever at 3/4vol on the head unit after DMM the amp to the recommended RMS value, But i close the trunk and it sounds like complete hell in the car. Its like the bass is trapped in the trunk? Do you guys think i should make a new deck out of wood with huge holes in it, and cut the metal one out so that I can get some pressure loss in the trunk, so that the pressure will go into the cab? Also the box is at 4 cuin @ 32.5 hz, "thats all i could fit in the trunk, theres not alot of ro…

I see a lot of people using the SSD to augment their existing home theaters all the time. Is there something that can be done to lower the FS? Maybe a different spider pack or gap adjustment. Thank you for your time and response, Chris