Fi Technical

I was wondering if 11.25 net tuned to 31hz and 166.25 square inches of port is too much for 4 fully loaded 12 inch BL subs running off of 6,000 watts of power?

just got my 12 bl hooked up today... its killer on the lows like it hurts your ears but when it hits the highs you can barely hear them. maybe it will get better when it breaks in im not sure... just wondering if this is supposed to happen or not

Well im about to order my 12inch BL and i just wanted to get some opnions on which i should get the Hyper Pole option or the Cooling option? Trying to only get what i need to.. Im only going to be running a kicker zx750.1 to it.. so only about 800-900w..

Does the 15" BL need to be in a 4cf enclosure to work well or can it be used in the smallest recommended enclosure which is 3cf without sacrificing anything?

My BL just stared making the noise yesterday, the sub is hooked up to a MTX TA81001. The gain is set at little over half. I really hope the voice coil is not going out.

I am going to be ordering a 10" BL and was wondering which to get? Should I go with the dual 1 or 2 ohm? I plan on running it off the saz-1000d. If I get the 1 ohm, that would bring it down to .35 ohm, but with the rise, shouldn't that bring it back to almost 1 ohm? Just wondering as the amp reports that it is only 1 ohm stable. or would it be better to go with a Mmats 2100.2 and get the 1 ohm and wire them in series? this isn't something I need ASAP, but any ideas would greatly help the process. Or... another option is to go with the dual 1 ohm wired in series and go with the saz-2000d. Ideas?

I've got a 2000 Frontier xcab and I've got 10.42 cu ft box for 2 18's to work with. I've got a saz3000d coming but I want to know if I should go with 2 BL 18's or 1 BTL 18. I'm thinking the 2 bl's would be louder, but the btl has better Xmax with the x coil option. I don't crank my system all the time( I have a toggle switch so I can shut the sub amp off-It's great for keeping the cops at bay) but when I do I want to incite fear and cure constipation from a distance. I want the hair trick factor and I want it to sound ok, not like complete chit. I'm looking for some serious BOOM for what space I got. It will be in competitions and electrical upgrades will be done. …

i bought 2 12" Bl's from a guy here in chicago for cheap....i really did want the Bl's at first but after thinkin about it, i want somethin thats got good sound quality and solid, pounding bass as well. i know the Bl's pound pretty hard and are basicly designed for spl but are they okay in sq? i have never really heard what a q sounds like in comparison to the bl. im not a stickler for amazing sound quality, but i want something thats kind of clear but can still scare people when they hear it and have some flex. my final system isnt going in until next summer so i have time to "decide". of course after i buy the Bl's i ask this question. and if any of that doesnt make se…

I'm building a 2.5 cu. ft.box for a BL 12 right now and I'm aware of the recommended port area but I was wondering what the downside to more area(42 inches) would be. Thanks.

says they're rated at 1000rms im getting 2 18" BLs d1s with cooling options, could they handle 1600rms a peice? my box is built its 8.5 cubes (before sub displacement) tuned to 35hz

Do you need big power to make the BL series subs play at their best? Will they play low and deep on 1,000 watts?

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.

Hey I have a 12" fi bl and I need to recone it I have it all striped down and the basket I sanded all that crap off but I need some advice on how to recone the sub and what I should do thanks for your help

I know that Fi recommends ported for BL's, but for space reasons, I'm wondering if I could do a BL in a sealed box with one of TCSounds PRs (passive radiator). This will be running off an USAmps 4000DE (1600wrms). For space reasons, my plan was to go with a 12" BL in a sealed 2.5cf box, with a TCSounds 15" PR (or VMP as they call it) http://www.parts-express.com/pe/showdetl.cfm?Partnumber=293-682 http://en.wikipedia.org/wiki/Passive_radiator_(speaker) For those too lazy to click on the PR link "Passive radiators are used instead of a reflex port for much the same reasons—to tune the small volume and driver for better low frequency performance. Especially in situations i…

This is my original plan and am wanting to make sure this is my best option for Loud and clean bass. I was used to running 1 Audioque 15" ported at 29hz in 7.5cu ft box off of 1400w, it was ungodly! Current setup - 1 Audioque 15" Sealed in 2.2 cu ft off of 1400w. It is a little less loud in the low frequency area due to a lot lower group delay as well but like how it sounds as well. Anyways, my current project is to have 3 12" Qs off of 3 optidrive 2000ds. Each q would be wired to 0.35ohms all in a common chamber sealed box roughly 2-2.4cu ft stuffed with polyfill (emailed fi about this to see what they say bout the polyfill). Now, these amps are rated at doind 1,600w at…

I'm looking for specs pertaining to a STRICTLY SPL setup using two BL 18's. What should the port be tuned to? How much airpsace do you recommend if I'm using a single chamber and acoustic coupling?

I have a pair of 10" BL's and chose the SPL option when I bought them. I had no intentions of playing music with them, but now I wonder if they'll handle playing music for a short period of time. I was thinking of trying Bass Race in Db Drags next season but don't want to have to buy new subs in order to do it. Does anyone know if these subs with the SPL option will handle music for 30 seconds at a time at full power?

I need to recone my BL and was wanting to know if I can recone it to BTL using the double stacked magnet kit.

I want something that will flex glass but that i can us daily. i was sold on the btl 18" but will it handle everyday abuse? Any help would be great thanks

about to drop in a pair of d2 bl 15's loaded for daily to replace my d1 q's (to go a little easier on my american bass vfl 200.1, thing smoked on me before and cost over 300 to fix) in 8.2 cubes @ 32 hz. was pushing the q's to their limits, about 1300 watts each, and raising the load to 1.4 ohms (3kw at 1 ohm) i'll probably be giving the bl's about the same power, maybe a tad more. can i expect the bl's to be louder across the board? will they still pick up the lows as well as the q's did or will i need more power to get that low end extension?

Right now I'm in the middle of my build with 2 18" BL's with a Trutech Hammer H1 per sub in a 16cuft wall tuned to 30hz. After this I'm pondering changing to two BTL 18's with a DDZ1. Just wondering would it be worth it in terms of being a major leap over the BL's and the Hammers ?

I have a 07 Tahoe and 2 BL dual 1 ohm 18s on a hifonics BXi 2010. I was looking to add 2 more 18 BLs in a 18cu. ft. ported box tuned to 32Hz. I also wanted to upgrade my amps to 2 RF T2500-BDs strapped at 2ohms. My question is will this be too much power for the subs? They are fully loaded for daily use. Please help. Thanx.

I have a 2007 4 door silverado and want to know if there is a way to build a box for a BL 12 to fit under my back seats. If so, any ideas?

Does anyone have the TS parameters for the Black Fi-Day X, specifically the 10"?

Where can I find some box cutouts for the old school black fiday x series 12". Can I use the new X cut outs or can I use the ssa dcon 12 cut outs. the dcons look like they are the same as the black fiday 12".