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Your Price:
$304.00 (You save $61.00)
51.00 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 Videos

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Product Reviews

Showing reviews 1-10 of 34 | Next

  1. 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.

  2. 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

  3. 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

  4. 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!

  5. 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!

  6. 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.

  7. 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

  8. 2 FI BL 12s 5 Star Review

    Posted by on 7th Apr 2014

    I had gotten my second FI BL 12 in the mail and I had gotten it in three weeks. I have them running off an alpine mrx m240 @ 2800 RMS and I must say that it was above my expectations, I get about a 1-1.5" flex off my roof and a free vibrating chair. If you are on the edge of getting one, do it. It is worth it and you get what you pay for in this type of game. thanks a lot FI I recommend you to everyone

  9. Best sub woofer purchase ever! 5 Star Review

    Posted by on 7th Apr 2014

    When I got my fully loaded Fi BL 12" Dual 2ohm in the mail, I could not stop grinning. The new carbon fiber dust caps looked amazing on an already amazing looking product! Once installed I was immediately impressed with the SQ and it's accuracy to each bass note especially the bass notes in quick succession. This driver has brought out all kinds of bass hits that I never knew existed in the songs I'm most used to!!! After I had it warmed up a bit I kicked in some lows and my car started flexing like a crazed body builder! ALL in ALL this BL from Fi is AMAZING! I will be back for more!
    Thank You Fi Audio!

  10. nicely shipped 5 Star Review

    Posted by on 13th Mar 2014

    Haven't installed yet waiting for weather to warm up but shipping was great,them subs weren't getting hurt unless they fell off a speeding truck.I'll be back to let you know how they sound and I can tell you right now it's gonna be amazing.And the carbon cap with red logo combo looks so good.

Showing reviews 1-10 of 34 | Next