Fi Technical

Bought a new Fi Q 12 and i was wondering if you guys could help me out with the enclosure, i have a hatchback its a golf with Cdt es-520 with upstage up front and cl-61a in the rear powered by a Directed 1100d5 and strapped to 600d for 1200watts @ 2ohm for the sub. i listen to wide range of music but mostly reggae, hip-hop, r&b, rap, pop, and some classics. My goal is sound quality but i would also like it to be loud at the same time without sacrificing sound quality and with that said would a sealed or ported enclosure best suit my hatchback. Thanks guys!!!

I am thinking about getting a pair of fi q 12's I am going to be running them ported in a daily trunk setup on a Saz-3500v2. I am getting the cooling option for sure but for I am not sure if I should get the extra spider & the internal lead options, I am thinking no on these options but I would like some opinions before I drop my cash on these subs.

Buddy of mine has 2 bl 18's ran off 1 sundown 2500d, he has them in slot port now in about 12.5 cubes gross. They sound decent, but dont really have the lows, and its tuned to 32hz. He wants new box with 4 6" aeros's in about 16 cubes net tuned to 32hz. How does this sound for size? I ran 2 bl 18's about 2 years ago off 2 sundown 1500d's in about 18 cubes net with slot port and they pounded the lows, and sounded perfect. I just havent done any builds with aero ports.

Ok So box build is going nicely so far. Im working 16 hour days cause well im greedy and i soak up whatever over time is avalible..So iv slowed down a little bit... I hit a 140.4 with a sine wave... I then hit a 139.9 with music... Is this just because I didnt burp it? It seems as though the Sine wave and the Music are way to close.. Im just curious is all and would like to know before I go and re meter with the new box...

Hi there, after trying to build my own ported box , with certain limitations, i came to ask myself that why do we need 12-16 sq inches of port are per cufeet ? The answer was to avoid air shuffing. BUT ! If a box is 3cufeet , the good book says to use minimum of 36 sq inches(minimum) port area for it, now if we use the same sub to play in a 5 cu feet box, port area increases to 12X5 = 60sq niches (minimum) Now i am guessing that the subwoofer will not miraculously start to push more air ,and that we may have to increase the port area to avoid air shuffing. The sub should displace the same amount of air in a 3 cu feet box or 5 cu ft box. So , why not use 36 sq inches port …

I'm sure it's probably not a big deal but my my dad had accidentally barley scratched the surface of the surround of my sub and decided to put a bead of epoxy to cover it and I was kinda upset .. And also while removing my sub from the box my right hand had slipped and accidentally hit the dust cap .. Nothing was damaged because of the hard cap but will these effect my sub and should I worry about it or is it not a relaly big deal?

Just being curious, about how nice would 4 15's, either BTL or BL, sound being funneled through a cut through in the bed of a truck going into the cab. Would the rear seats ruin a lot of the air being moved? Or will stuff still fly????

i just ordered 2 12" Fi Q's and i've seen specs on how many cubic ft to make the enclosure and stuff like that but i want to know the specs on a ported enclosure for TWO 12" fi Q's!!! i just want the best for my twins and whats up with all this tuning to (x) amount of hertz and s*** like that?? how the f*** do u tune a subwoofer??????? well all i know is that i want my twins to play as hard as possible with the best sound quality and for people to be like WTF DO U HAVE IN UR FU**ing TRUNK MAN!!!??? lol feel me? so i just need 3 questions answered: specs on a ported box for TWO 12's.....whats the ideal hertz to tune the subs to (and how to do that).....and please list the…

Hi there, I am not sure exactly what I need to have all my settings set at to run my bl 15" and need a little help.. The box is 4 cubes and tuned to 33hz, more importantly the amp is a hifonics brutus BXI-1210D, I need help tuning this for the bl! The amp has "level" or "gain" 9v-0.2v, "Phase"0-180, "bass eq" 0-10db, "subsonic" 15-35Hz, and the "lowpass" 35-250Hz. I need to know where to put the Phase, and Lowpass the most but if someone knows exactly how to tune everything feel free to tell me!! Thank you!

I was going to oreder a 12' fi sticker for my truck but the shipping is 12.00!!! Why and how is the shipping that much??? Its a 0.76 lb sticker that costs 4 dollars. But 12 to ship somethings not adding up here.

As I stated in another topic, I burnt one of the voice coils in one of my 12" SSDs. One of the voice coils is still fine. I was just wondering...until I get the recone kit in the mail, is there any way to wire up my amp to just one of the voice coils? The reason I thought about this is I did the AA battery test (hooking up the + and - to the sub to hear the pop) and since that made noise, I was thinking maybe it could run off one voice coil. If that is possible, would it be bad to have one sub like that and one sub wired normally? Technically wouldn't it just be 1.5 ohms? My amp is 1 ohm stable. Thanks a bunch, Mike

Just bought a pair of the older double slug Q15's for my buddies install in his Suburban. Can't remember the specs of these models, so I wanted to get it straight from you guys at Fi. They are fully loaded and I also believe they are the high QTS models, as the previous owner had them installed in sealed boxes.... My friend is looking to have me design a sealed enclosure for them, and I am not sure what the recommended volume is for them. Can you help me out? They will be powered with an MB Quart Onyx 1000 @ 2 ohms for about 750 RMS to the pair. Possibly will add a second amp to power each sub on its own amp later down the road, but that has not been decided yet. Merry Ch…

My Q15 peak is 39 htz and i didnt know if there was any good songs anyone knows cause i need one for my fist comp cause i cant use sweeps, test tones, i have to use a daily song?

I have one SSD10 D2 with copper coils in a sealed box with about 600 watts rms coming from a Phoenix Gold Ti600.2 I know going ported will give me more output but i'd really like to stay with the sealed box I have because it fits perfect in the truck. So, i've been looking into getting a 1000 watt amp like a Sundown 1000 or Alpine PDX 1000. Would this upgrade be worth it or should I stick with what I have?

I cut a box according to the ssd cut sheets, and it is in a 08 mazda 6i sedan (non hatch model). well.. Downside is it does not fit with the sub facing the seats. I gutted the trunk to bare metal to see if it would help me try to squeeze it in.. NADA. I PROMISE you it does not fit any other way unless I somehow build it in the trunk. So my dilemma, is that the sub is pointing straight up towards a panel, and a lot of the bass "energy" is soaked up from it. Is anyone knowledgeable to give me the smallest possible dimensions for 33hz ported box? I suck at numbers, they give me headaches, and I failed alg. twice in college.. lol. I know that sounds lazy, but sub boxes are n…

hey all i just ordered my first fi btl 18 . i choose all the options that were availible for it so i guess it is fully loaded right? anyways my real question is how THE heck am im going to fit two in my civic ? i know most might say i prob shoulda thought of that first but i will find a way to make them fit . my best idea yet was to actually take out back seats and extend the trunk into the car so when you look into he trunk it looks like its reall deep. than build THE box into the trunk extension . basicly you would open the trunk and the woofers would sit right were the back of the seat was originaly and the box would be ported on the inside behind driver and passenger…

OK so i have a hifonics 1606 powering one 12 Q and i have the gain turned all the way down and the multi meter is reading 36.6 volts and if i turn the gain up to about half way it reads like 55 v. i am confused and my headunit is only 2 v preouts what is goin on, is there anywone that lives in so cal that can help me set my gains and check my setup because i am either just plain stupid or something is wrong.

I was driving to San Francisco today listening to music in the car not all that loud and about 3/4 of the trip I noticed that the brakes started to respond slower. For example, I'd press down the brakes 1/3 of the way down and it won't respond until I press halfway down until the brakes even start working. By the time I arrived in the city, I popped the hood and I noticed that the wires were coming loose from the fuse holder. What's even worse was that the wire was in contact with something metal and I saw some burn marks with something black that melted as well, probably plastic. Anyways, I made it safely, but it turns out I didn't do a great job with the wiring. Althoug…

Hey, I've been looking at Fi car audio for a while to help fix my BMW's horrible lack of bass. I was originally looking at the 12" Q but after reading around I decided that the BL would better suit my needs, I now am at this problem I know my trunk can fit the optimum box dimensions for the 10" and 12" but I dont really want to sacrifice all that space but then I want it to also to be hitting pretty hard. Also whats a good amp recommendation for the best price/performance

for my next setup i was thinking of doing an 18" btl out of a 2002 pontiac grand prix's trunk on a sundown 3500d. it seems thats what everyone likes to pair up with the btl. this is for a daily system. and the box would probably be like 6 cubes tuned to mid 30s. is this a solid setup? how much wattage do u guys think it will actually see after impedance rise? should i just get a 2000 watt rms amp or roll with the 3500 like i was planning on? and i know this is a difficult question to answer, but does anyone have any experience of any setups like this playing out of a trunk? obviously it all depends on the install and blah blah blah, but i was figuring id make somewhere ar…

Hi, i just have this dilemma on what to tune my box to for my Fi BL 10 going on the trunk of a Sedan i saw in the sticky topic that 32hz is the optimal tuning, does that also apply for Sedans? cause i just had this thought that tuning it to 32hz might not give much punch anymore and will only get loud on lows, is 34-35hz better for a Sedan? Thanks in Advance! -Carlo

where is the optimal placement for the sub cut out. i went a head and am building a box for my single 12"Q. and it's just a basic little 2.36cuft @ 31.69hzported box. i got to thinking before am going to make my cut out for the sub. should i put the sub closer to the port? or dead center? or away from the port? what are the advantages and disadvantages of each? and what would you recommend? also the sub cut out should be at 11.7 inches right? on the website i got that from the cut ID number. thanks guys

hi, i just receive my BL and noted that there is a plug on the pole vent. Shall i take it off? here is the pix : http://s291.photobucket.com/albums/ll314/_...nt=DSC00241.jpg thanks.

Well i received my 12 inch q in the mail about 3 weeks ago, was packaged with much care and got here in a timely manner considering the holidays, thanks fi. The sub is in a 2.7@32hz box, sub and port back. The Q is being pushed by a US Amps XT4000d(1500rms@1 ohm), so it's getting all the power it needs. The Q gets fairly loud and sounds great with different types of music, but I'm just not getting the lows that i was expecting after reading all the reviews on it. Songs like soul survivor and the low note in hypnotize just aren't being played with authority. I know that there is supposed to be a break-in time with this sub, but the suspension has loosened up since the firs…

I am currently waiting on my q12 dual 2 to arrive, and it is going in my work van (E-150) Passenger Converted to cargo. I have a two fold question I would like it if the box were no more then 15" front to back considering the sub facing front. My current setup has the sub firing into the back of the drivers seat as this is where it is the most protected and less likely to be damaged. I wouldn't mind using the ported box cutsheet for a Q12 as shown but I would have to put legs on the "face" and set it up so it was downfiring at the floor in order be able to carry the amount of tools/cabinets I typically do. (I am a cabinet maker so I can build anything you can imagine …