Fi Technical

I have made up plans for a 6cu ft box, after port and displacement. The port would be 4" Wide and tuned about in between 33 and 34hz. If i made the port 5" wide, it would take the box all the way down to 5.1 cu ft or so to be tuned to 34. The port would be 21.5 in tall. It just seems to me that 4" is small, but then again thats a lot of box volume to take up. I'm really hoping i'm just more worried than i should be about port size, and the 6 cu ft will work out. Any suggestions?

i just ordered a 1600 watt hifonic brutus mono and i need some help with the Q. im not sure if it would be better for the Q to be ported or seal, also if i should go dual 1 ohm or dual 2 with my brutus?

does an one know the displacement of a fully loaded BTL the web site say .26cuft but thats not with the 3rd slug, just tring to get as close as i can so that way my port will be as tuned as possible, or is .26cuft close enough

Anyone know the "Le" parameter of the Q18 dual 2 ohm sub? Thanks for any help.

I was told that I could check the sub with a dmm meter to see if its in good condition I got a 1.9 reading is this good, I think so just want to make sure? Its a 2 ohm dvc

alright for about 2 months now i have been breakin in my 15 inch bls...... so can i feed them more power now?? or should i stay the same?

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…

2 18in btl's fully loaded 12 cuft tune 34hz Port wide 18.5 in height 5 in lenth 10 in That is 185 sq in 12 x 15.42 = 185.04 right? thanks

I hope this is posted in right place.... Two questions: 1.) What is the RMS and peak wattage for a single 12" BL with the dual2, flatwind, daily and pchamfer options? The reason I am asking is because I seen on Fi 's site that it says 1000w/rms, but everyone is highly reccomending the sundown 1500d (which i am about to get.) So, why is that so if it is only rated for 1000watts? Does adding those options bring it up? I had a new custom box built by Sound Advice here in florida and the guy who was instlling it says to me that I will not notice too much of a difference in swithcing from a RF Punch 1000w/rms amp to a 1500 watt/rms amp ( in this case to the sundown 1500d)…

is it ok to trace around the inner black gasket ring that comes with the subwoofer to get the size for the cut out hole?

Just got my 18" Q w/BP in the mail yesterday. (thx scott). Next week is spring break and I need a box design for the back of a 97 blazer. I have about 8 cubes to work with. Accordman from steavemeadeforums told me to go 6.3 ft^3 and 90 in^3 of port, which results in a 32-33 hz tuning. I have never worked with 18's before, and I've heard certain boxes for 18" Q's can really restrict their output. I only have about 1000 watts RMS from a bxi1206d to work with for now, but plan on upgrading to 1400watts rms. My goal is to make a well balanced box. Not pure SPL or superlow tuning for SQ. I just want to get the most, good sounding output from the sub. And i'm a broke a…

i have an fi bl 12 that is practically brand new that i had bought for the honda i thought i was going to be using well now im stuck with this sub and want to put a system in my dodge megacab but havent been able to sell it and am not sure i have enough room back there to port it. i have been out of the game for a while so any help would be appreciated.....thanks

Yes i read the sticky at the top of the page, but i just wanted to see what people thought. I haven't bought anything yet, but what about a hifonics bxi2006d (yeah i know its not sundown or anything), at 1ohm (1800-1900 watts im guessing?), on a bl 18 with p chamfer and flatwind? would that be enough to handle 1800 rms? I know i could turn the amp down, but i wanted some input.

what do i need to change on my cut list to have my box tune to 32hz? Tthis box is tune for 28 hz

Hey Scott, been a while... once again need your services for some recones, starting off with a standard recone for an RE XXX 15" (old style '05) with 2 spiders and DVC 1.4 coil I have a few more parts I need, a bit of a list, let me know if u prefer an email about it ill check back here later

Just placed an order for my 15" BL Anyone willing to help me with a box design? Trunk Dimensions Estimating: 36 x 36 x 18 width = 36 in. length = 36 in. height = 18 in.

first system about 90% finish, would i need a dual 1 or 2 in this situation, dont wanna go 1 ohm strapped at all since they dont make HO alts for a 2002 deville yet, still looking... got a chamber t line built by rich that i,ve had for about a year now, 2 1500ds, 100.4 coming temp. highs i have arc audio fd6000 up front and kenwood excelon coaxils out back on a aura rpm4200 4 chan. clarion max675vd II for the headunit and a clarion equalizer. kicker kyperflex, kollosus 4 guage 4 chan on the way. no alt but i was told that the alts in the 02 devilles and dts really put out about 180-190 amps as told by ohio gen after they tested a few, also adding a powermaster also. thi…

After hearing a BTL for the first time yesterday i have decided that i want one, really bad. I will only be pushing 2000 watts to each sub in a daily setup (no comps). Is there any point in getting the high XMax coil, does this loosen up the suspension for better SQ. the BTL that I saw was only getting 1500 watts and didnt seem to flex much so im not sure if the high xmax coil would really do anything. Thanks, Keith

I'm just curious as to why the Universal option isn't on the subs by default? It doesn't cost any extra money, yet i do not see any disadvantages of having it done to a sub even if you do not want it. So... is there any disadvantage of having it even if someone doesn't want it?

Hey I own a 03 Tiburon GT and am planing on putting in 2 12" BLTs with 2 SAZ-3000ds. I want to compete in SPL but also want to be able to listen to music (not as important). What type of box should i get ported or seal and should I get a wall or will it just be a waste of wood. I don't want to do a wall unless it will boost me db. Thanks for the help, I don't have a clue what to do.

Hello, I have a kicker zx.750 and a single kicker 12 inch solo-baric L7 woofer. I tried a ported enclosure and now it is in a sealed enclosure, but I just am not getting the bass I am looking for. I have been looking into a Q series woofer and was wondering what size people would recommend and how big of an enclosure for the wattage put out by the zx.750. I currently have a 1992 lexus es300 (4 door sedan) but may possibly be buying a 1998 ford expedition. Could somebody give me some advice about what to do?

Been debatin on 3 10" bls or 1 15" BTL off of 4Kw. I'm thinkin about goin with 1 15" BTL so i got some questions. What options do i need exactly for the following scenario? - It's for daily, tuned to 33hz, running off of 4kw of power. No SPL but i will be playing, sometimes, bass tracks for show off purposes. Absolutely no clipping guaranteed. Let me know if this is correct or if i should change\add something- Cooling, HIXMcoil, 3rd mag(do i need?), Daily. Can the BTL take 4KW daily? I know Meade does it but is it still safe in Fi's eyes? And i would like a discussion on the cooling option. It states not to get it if used for SPL. Can someone please define what specifi…

I am curious how much of a difference there is between a 2ft^3 and a 2.5ft^3 box tuned to 32hz for a 12" Q. I've read that bigger is better for ported boxes, but 2ft^3 boxes tuned to 32hz are readily available on e-bay. Would I be giving up a lot of output or response for the convenience of an easily available box, or would this be a good buy? If it matters the Q will be powered by a 1000 watt MB Quart raa1000, and going in a 93 Saturn coupe.

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.

I recently purchased a 12" Q series sub. I am installing it in a ported enclosure and I am curious to the size and tuning. After purchasing the sub I found a deal too good to pass up on an amp that is a little underpowered for the Q. It is a kicker zx750.1. It puts out between 800-900 watts rms. I see on the pinned topic at the top the recommended ported enclosure is 1.8-2.5@ 28-33hz. With 12-16 square inches of port volume. My question is should I change the box size or port area since the speaker will not be driven at full rms power? I want to get as much out of the speaker as I can with the power I have available. I thought I would ask on here instead of calling seeing…