The Q Series of subwoofers is our sound quality reference line. Featuring a hefty high strength single magnet motor structure with a heavily bumped t-yoke, the 27mm of Xmax allows for incredibly detailed, tight, and powerful bass. Triple progressive spiders keep the incredible linear excursion of this sub under control, while the extra heavy lead wire feeds the giant voice coil. With technology pulled from the larger BTL line the new Q has more options than ever before. Hyper chamfer, full cooling, high or low Qts topologies, as well as the ability to add an inductance ring in the high Qts design, there is now even more flexibility within the Q platform. Working well in both small ported and sealed enclosures, you do not have to give up your trunk to have strong bottom octave foundation for the rest of your system. The Q series is the new bottom octave benchmark.
Showing reviews 1-10 of 26 | Next
Posted by Tom on 8th Aug 2014
I've had them all from low end to high end. I can honestly say these are by far the best sounding subs I have ever owned. I have 2 12s d1 wired to 1ohm on a 3500 bc crescendo in a 2008 f350 extended cab. I was never into ported boxes due to lack of punch however with these I wanted to see the full potential. Words cannot express the sound quality yet loudness these are capable of producing without any distortion. I highly recommend these to anyone serious about sound quality and being the most obnoxious vehicle on the road. Here in boston I call these "wicked Pissa"
Posted by Unknown on 4th Jul 2014
It took me about 30 days to get my subwoofer. I first put it in a 1.5 cubic foot sealed box running off a 1500 watt Hifonics amplifier. My sub hated that box, it didn't do anything I expected and initially I was extremely disappointed. It didn't get low or hit the high notes. People didn't even hear me coming when I had the music up. I then got a friend of mine to build me a custom ported box. It's about 2.2 cubic feet tuned at 32hz. Now , my subwoofer get down!! It loves the ported box! People hear me coming for far far away now. It gets killer lows and hits high notes HARD. I have the custom added spider so I may upgrade to a 1800 watt Hifonics amplifier to push it a little more. Gotta order the Fi stickers for my car soon. Overall, a bad ass subwoofer!
Posted by Lex on 14th May 2014
Did I get your attention yet? Let me first state that I'm not one to write reviews. I'll follow with I am a perfectionist and am never usually happy with what I have and am always looking for better. I've tried subs that other people demo'd and reviewed as unbelievable and was not at all satisfied like they claimed that they were, so I was a little skeptical about purchasing this sub. But the amount of 5 star reviews were far to numerous to look past, as well as the absence of any negative reviews, ANYWHERE on the net. My Q 12 arrived well packaged and in perfect condition-what a smexy, beasty subwoofer. Only downside is the wait time, about 28 days for me, but not really a downside when doing a quality build setup. By the time the sub arrived, it was basically plug and play. I had it built with the high Qts topology, p chamfer, and I heat ring w/ a carbon fiber cap. I have a Crescendo Symphony 1500.1 pushing it w/ a sealed box a little bit bigger than what Scott or Nick recommended at 1.45 approx. after displacement. This is a perfect amp/sub combo. On decaf musik this box hits stupid low, unbelievable for a sealed box w/ only 1 12" with air pressure like I've never seen in a sealed box. Hit's 32 hz with ease and feels at home (and this is straight out the box, not broken in yet) It's gets so ridiculously low that my Nendo dealer's jaw dropped when we test rode it after tuning it on a dd-1 and o-scope (and he is a die hard aero/flare port only type guy)Now on to some Linkin Park. All I can really say is wTF??? I have it tuned up to 100hz w/ a -12 slope and this sub hits so quick, so hard and is so responsive. The transition between beats is nothing less than perfect. You get all the benefits of a pure SQ setup, w/ the much missed and lost deep hard hits that are sacrificed for studio quality sound. It is the cleanest hitting sub I've ever heard, and yes, it's better than the IDMax and JL w7's IMhO. I've been babying it for the past 2 weeks, and its still stiff as hell. I'll make sure to post some pics/vids when I have my setup how I want it and broken in. I know this review must sound like I was paid to promote it, lmao, but I am just honestly blown away by the quality of this U.S.A made, hand built beauty of a subwoofer. The price is amazing for the quality it is and I am now a lifelong customer. Hats off to the customer service received through the process. Nick and Scott are some good dudes that never let a message or email from me go unanswered, and even through in a free carbon fiber cap.
Just buy it already, you won't regret it!
Posted by Unknown on 12th May 2014
having listened to kicker L7's alpine type x's and jl w7's the sub is superior the them all. unfortunatly mine was stolen within two weeks if receiving it but while i had it, it was great. its marketed as an sq sub but it still gets LOUD. was only running 1300 rms to it and it would still make any pop or energy drink in the cupholder start to fizz everywhere. will be replacing with the 15 with cooling and running 1700 rms once i get a car alarm first ;)
Posted by Unknown on 14th Mar 2014
I replaced a jl 13w7 with a 12q and this beast sound just as loud or louder with alot more sq!! Great price and the best customer service. Made in U.S.A.!!
Posted by John on 5th Mar 2014
My Fi Q 12 replaced a DC level 3. In the 1.75 cu ft. Box I have in my regular cab truck that's tuned to 30hz, the DC wouldn't pick up anything below 33 hz with authority. Pickup up nothing below 29hz but the Q dominates at 33 hz and below. It gets very low! It will even pick up 25 hz no problem in the same box! It's rediculous and I'm amazed! I will not buy anything else! 2-Fi Q 15's will go in my car next.
Posted by Lucas on 26th Feb 2014
best sub I've ever owned, probably won't buy a different brand ever, just be prepared for the wait....it's worth it
Posted by Anthony on 11th Jan 2014
After extensively searching the web and reviewing my options I decided to go with Fi. I'm running it with a Hifonics BRZ1200 in a sealed box and holy smokes it pounds. People say that their sub isn't that loud in a sealed box... And although I will agree that it isn't as loud as a ported enclosure, this sub is by no means quiet. As I was doing my research, I read that the JL 12W7 is so $$$ because of the materials they use and the engineering behind it. In truth, I'd take my Fi Q any day and best of all it's half the price. There are absolutely no corners that were cut in the building of this sub and you can tell by the end product. They even threw in a carbon fiber dust cap at no extra charge, so not only does it sound amazing, it looks badass too.
Posted by Unknown on 19th Dec 2013
I owned one of these in a ported box powered by a 1000.1 Rockford amp, and it produced the best sound quality I have ever heard from a sub ever. It also was the loudest too. A lot of people complain about loud subs, saying they are loud but sound like shit. This speaker seems to sound better the louder you play it. If you are looking into buying subs, buy this one and cherish it. Mine got stolen within 3 months of having it! I would do anything to get it back, but unfortunately I will wait until I move again to get another one because it is impossible to hide from anyone! Hands down the best subwoofer ever created.
Posted by Blake on 3rd Nov 2013
Phenominal, crisp, clean, smooth, can hit every note I throw at it. It is a great subwoofer and I womt get anything else but Fi now, it took a month to get it too me. But it was DEFINITLEY worth the wait. Not a single complaint or con that I can give this sub. I was looking at jl audio, kicker, sundown, mtx, orion, lanzar. When all an all came down to it. I new I made the right the decision and I'm blown away by this subwoofer. Just buy it.
Showing reviews 1-10 of 26 | Next