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Your Price:
$304.00 (You save $61.00)
61.00 LBS
Estimated build time of 10-15 business days
Calculated at checkout

Product Description

All US steel machined in house at Fi.

The BL Series fills the gap between the all out SPL monster and a solid daily driver. Featuring a chamfered solid pole piece and standard double stack motor structure with 8.660" magnets as the foundation for a truly tough subwoofer, you can choose from a variety of options to custom tailor the sub for your exact application. With the addition of the hyper chamfer, or our patent pending heli-cooling channels along with the Daily option, you can bump up the subs thermal capacity for long term daily driving abuse. Looking for an ultra tough SPL sub? Choose the SPL option, one of the 8 layer aluminum flatwind voicecoils, add power, and let it rip. With head cracking upper bass and brutal low end, the BL handles the extremes with ease.


BL Series: 10”, 12”, 15”, and 18”
Dual 1 and Dual 2 Ohm (custom options available)
Cast basket
Wrap around gasket
Kraft pulp fiber reinforced cone
Single layer wide foam surround
Push terminals
16 integrated leads option
FEA optimized motor
High Flux density design
3” diameter 4 layer coil (Flatwind option)
Double stack magnets
Five progressive spiders
Optional Heli-cool systerm
Machined in house at Fi
And many other custom options


Fs: 35.2 Hz | 39.8 Hz
Re: 0.7 Ohms/coil | 1.4 Ohms/coil
Qms: 4.68 | 4.72
Qes: .25 | .25
Qts: .24 | .24
Mms: 212g | 212g
Cms: 0.96mm/N | 0.96mm/N
Sd: 480cm^2 | 480cm^2
Vas: 31.2 l | 31.2 l
Spl: 89.1dB 1W/1m | 89.1dB 1W/1m
Bl: 16.6 N/A | 22.7 N/A
Xmax: 18mm | 18mm
Rms: 1500W * | 1500W *
Sealed box: N/A cuft | N/A cuft
Ported box: 1.5-2.5cuft | 1.5-2.5cuft
Sub OD: 12.500” | 12.500”
Cut ID: 11.125” | 11.125”
Mounting depth: 6.750” | 6.750”
Displacement: 0.18cuft | 0.18cuft


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Product Reviews

Showing reviews 1-10 of 37 | Next

  1. awesome sub 5 Star Review

    Posted by on 14th Aug 2015

    This subwoofer is amazing, it sounds very nice and it can get very loud . I am very pleased with this subwoofer. It's great sound quality and overall build is high quality. This sub makes my roof of my car flex. All I have to say is WOW!! Good job fi audio.

  2. wow monsters watch out yall 5 Star Review

    Posted by on 29th Jul 2015

    These things are monsters funny thing though my stupid self got so excited I hooked them up wrong so haven't had the chance to here them yet but going to fix I got the crescendo bc3500d the other day going too two of these monsters so I'm ready bring on the noise

  3. CHANGED MY LIFE!!!! 5 Star Review

    Posted by on 20th May 2015

    Man where do I start 2 BL's Goin Crazy In da whip now after 3 hours after install rearview mirror almost gone bihh shit bangin right now Fi y'all got this hands down!!! Thanks Nick and the Crew

  4. Superb 5 Star Review

    Posted by on 10th Feb 2015

    Have one BL 12. It sounds very good and really gets down for one 12. Couldn't be happier. Customer service was excellent as well. Thanks Nick.

  5. Wow 5 Star Review

    Posted by on 23rd Dec 2014

    I bought a 12" BL fully loaded and I have to say WoW! Just one, when I told my friends they thought I had 4 12's. I got it with a RF 1200.1D @1 ohm. You will not be disappointed! Fi 4 life. Lol

  6. awsome 5 Star Review

    Posted by on 18th Dec 2014

    I have mine at 1500 watts rms in a superbass probox and i love it! No complaints what so ever

  7. Excellent Quality 5 Star Review

    Posted by on 30th Sep 2014

    I have (1) Fi BL 12 (no options) pushed by a Planet Audio BB4000.1 in my crew cab Silverado. I am assuming the amp is providing around 2000 - 2200 watts at one ohm to the sub in a 2.2 ft^3 box @ 33 hz (under the seat.. barely!). This thing absolutely SLAMS and is very musical! Great job Fi, you'll get my money again!

  8. Awesome sub! 5 Star Review

    Posted by on 4th Sep 2014

    I've had my Bl12 for a few months now in a 2.5cuft box tuned to 30hz with only 1200w rms going to it and this thing POUNDS the lows. I never thought a single 12 could do what this thing does every day. My fully dynamat'd trunk stands no chance against the rumbles this thing makes. Fi customer for life!

  9. Great sub 5 Star Review

    Posted by on 19th May 2014

    Best sub I have ever paid for so far. I was a little skeptical at first. Now I realize why it takes so long to ship. You can't have subs like that on standby. It really slams. We'll worth the wait. I will be buying 2 more later.

  10. great sub 4 Star Review

    Posted by on 29th Apr 2014

    Very surprised on how stiff suspension was sub hits clean and hard just took long time to received sub would like to see better updates on status of shipment said sub just shipped 2 weeks after sub was delivered

Showing reviews 1-10 of 37 | Next