(UL-SL12) Critical Mass High-Performance Ultra-Lightweight 12 inch Subwoofer

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(UL-SL12) Critical Mass High-Performance Ultra-Lightweight 12 inch Subwoofer

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5.0 average, based on 1 reviews


Product Information

Technical Specifications:                              BOX TECH NOTES

Subwoofer Size: 12”
RMS Power handling: 500 Watts (undistorted power)
Peak Power handling: 1000 Watts
Recommended Box Volume: 1.2 cuft. (Sealed)
Weight: 4.6 lbs
Motor Type: G.A.P. / Internal NEO Magnet
Voice Coil Type: Ultra-High Temp Dual Coil (Made in the USA)
Voice Coil Diameter: 3”
Voice Coil Impedance: 2 ohm nominal per coil
Xmax (one-way linear excursion): 12 mm (2” peak-to-peak)
Maximum Excursion (one way): 29 mm
Sensitivity: 94.7 db (2.83V / 1m) (coils in parallel)
Fs (Klipple-LSI): 31 Hz
Qts (Klipple-LSI): 0.57
Vas (Klipple-LSI): 22.9 Liters


This driver is made with the automotive performance enthusiast in mind. At only 5 lbs, this subwoofer handles up-to 3
times more power, has a considerably higher linear and maximum excursion, and
audibly lower distortion, while weighing as much as 66% less than other Slim
Subwoofers (woofers with a depth no grater than 5").
These subwoofers made by other companies can weigh as much as 25 lbs. On the
other hand, the Critical MASS High-Performance Ultra-Lightweight Subwoofer will not
only play louder and handle more power, but it will also play in a smaller box, and
therefore, can save you as much as 100 lbs from subwoofer system weight when
combined with the reduced weight of a smaller enclosure (based on two 12” subs).
A 100 lbs reduction in your system weight, translates to accelerations gains resulting
in up to 1/10th of a second off your 0-60 mph times, or as much as 1 car length
faster. So the next time you plan to invest $1000 on an exhaust system, keep in mind
that you may have already lost your expected performance gains, unless you are using
Critical MASS UL-Series subwoofers and speakers.


Allows for much greater linear excursion and power handling than conventional
drivers. This Ultra-Performance Subwoofer utilizes the G.A.P. configuration technology, 

which results in up to 2.5 times more X-max than conventional motor designs.
Huge, vented, NEO motor structure. Utilizing the latest and best high temp,

high grade Neodymium-Iron-Born magnets, which generate up-to 20 times more magnetic energy
than conventional ceramic magnets of equivalent size. This design keeps the
motor running cool, enabling much greater power handling capability than conventional
Neo designs.


This cone is one of the only cones that will withstand 2000 Watts of peak music power.
The Lightweight Carbon Fiber Sandwich Cone increases rigidity, and therefore efficiency,
which ultimately means more, undistorted, car-shaking bass.



Product Code UL-SL12
Condition New
Weight 5lb

Customer Reviews

Average Rating: 5

Best flat shallow thin subwoofer speaker i have ever tested

1 2 3 4 5
Best flat shallow thin subwoofer speaker i have ever tested... This product is a winner! (Feb 20 2018, 17:33 PM)
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