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KICKER 51KGMDL7T122 L7T Custom Fit Dual 12" Subwoofer Down Firing Enclosure, Compatible with Select Sierra or Silverado, 2-Ohm

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Availability: 13 left in stock
Fulfilled by WORLD WIDE STEREO

Arrives Saturday, Jul 18
Order within 8 hours and 45 minutes
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Product grade: New


Features

  • Made to match every curve and contour, these loaded truck boxes are custom-made to fit perfectly under your back seat.
  • Tough MDF construction and thick internal bracing keeps the enclosure stable, even with extreme bass. Covered in durable black carpet and sporting a custom KICKER logo, these enclosures are pre-wired to a single two-Ohm terminal for maximum output. All you need is an amp!
  • KICKER signature-square, sub-design technology has nearly 20 percent more cone area than comparable round subwoofers, moving more air and producing louder bass in the same space! A next-level top-plate design, unique heat management system and our signature cone stitching all help to give you deep bass and outstanding reliability!
  • The L7T features Forced-Air Cooling, creating high power handling and ultra reliability. As the woofer's cone moves downward, hot air around the voice coil is forced out of the woofer. As the woofer's cone moves upward, cool outside air is drawn into the woofer cooling the voice coil.

Description

Dual L7T Truck-Specific Enclosures provide impactful bass and install under the back seat to retain cab space and legroom. Made from thick MDF and formed specifically to fit every contour of your Silverado or Sierra, this custom enclosure features a pair of down-firing L7T 12" subs with a 1,200-watts of recommended power. Made to match every curve and contour, these loaded truck boxes are custom-made to fit perfectly under your back seat. Durable MDF construction with strong bracing for stable bass. Black carpet, KICKER logo. Pre-wired to 2 Ohm terminal for high output. Just add an amp! KICKER's signature-square sub-design tech offers 20% more cone area than round subs, delivering louder bass in less space. More cone area means more air moves for up to 20% more bass. Largest voice coil and magnet in a thin sub with features for deep bass and reliability. What year/make/model does this box fit? Chevy Silverado/GMC Sierra Crew Cab (2008-newer) *Items such as inverters, storage compartments, spare tire tools or floor mats may require removal. GM Trucks 2019-newer Enclosures do fit but not as perfectly. Is there a RAM Specific model? Yes! You are looking for the 51KRDL7T102. Is there a Ford Specific model? Yes! You are looking for the 51KFDL7T102.

Audio Output Mode: Mono


Mounting Type: Underseat


Enclosure Material: Wood (Mdf)


Speaker Type: Subwoofer


Additional Features: Underseat Subwoofer Enclosure


Antenna Location: For Trucks


Color: black


Is Waterproof: FALSE


Warranty Type: Limited


Control Method: Touch


Speaker Size: 12 Inches


Woofer Diameter: 12 Inches


Specific Uses For Product: For Trucks


Frequency Response: 100 Hz


Number of Audio Channels: 2.0


Impedance: 2 Ohms


Connectivity Technology: Wired


Connectivity Protocol: Wired


Power Source: Corded Electric


Brand: KICKER


Model Number: 51KGMDL7T122


Model Name: 51KGMDL7T122


Built-In Media: 51KGMDL7T122


Warranty Description: 1-Year Manufacturer Warranty


Number of Items: 1


UPC: 713034058359


Manufacturer: Kicker


Best Sellers Rank: #122,865 in Electronics (See Top 100 in Electronics) #92 in Car Enclosed Subwoofer Systems


ASIN: B0CX2LX3V7


Speaker Maximum Output Power: 2400 Watts


Unit Count: 1.0 Count


Item Dimensions D x W x H: 17"D x 8.6"W x 53.6"H


Item Weight: 79 Pounds


Compatible Devices: Gaming Console, Laptop, MP3 Player, Smartphone, Tablet


Compatible with Vehicle Type: & SUVs, Select Cars, Truck


Audio Driver Type: Dynamic Driver


Audio Driver Size: 12 Inches


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Jul 18

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Great, just check fitment
2019 chevys or gmc and up will have a gap but works great just need to remove tool tray. But any year below will fit perfectly! Worth the money.
Reviewed in the United States on May 10, 2026 by Jesus

  • Better than I’d hoped!!
Love these so much! Paired with a 1200 watt RMS Kicker amp and these sound so good. With this combo, they are easily loud enough to go deaf, so be warned! 😅 The fit isn’t perfect in my 2025 GMC Sierra 3500 AT4, but it’s good enough that it looks like the box could have been custom fab work. Note that if you have the factory Bose system like I do, you’ll probably need to mount your amp to the sub box, like my installer did with mine. He said there was no way the amp would fit against the back wall of the cab due to the placement of the factory Bose amp. Will update with photos when I take a few. 10/10 would buy again. ... show more
Reviewed in the United States on March 21, 2026 by SG

  • Good fit
Great thumper, good sound. There really isn't any other way to put subs in a truck.
Reviewed in the United States on May 8, 2025 by Amazon Customer

  • Absolutely worth every penny. Deep, clean, powerful bass
These subs are the real deal. I installed the Kicker 51KGMDL7T122 in my 2023 Silverado ZR2 and they fit like a glove under the back seat. Zero modifications needed other than removing the factory storage tray. Kicker clearly designed this box to match the acoustics of GM trucks — the sound is deep, clean, and tight. Not muddy or sloppy like some prefab boxes. I’m running them on a DS18 ION1200.1D amp and the match is perfect. I was worried it might be too much or not enough — turns out it’s just right. These 12s hit hard but stay musical, and they don’t rattle or buzz the cab like my old 10" sub did. I’m seriously impressed with how well they handle low-end rumble without distortion. If you want real bass that doesn’t kill your interior space or require custom fiberglass work, this is it. Kicker knocked this one out of the park. Easily one of the best upgrades I’ve done to the truck. ... show more
Reviewed in the United States on July 19, 2025 by John Williamson

  • 2014 Chevy Silverado double cab
This fit under my seat in my 2014 Chevrolet double cab perfectly. I always have preferred ported boxes and wasn’t sure about the shallow sub design and sealed box , but man this thing is super impressive. It covers a wide range of bass from punchy bass to the low frequency bass . I upgraded from kickers L5s and wow what a difference , if you’re on the fence on buying these just do it you won’t regret it. Great job Kicker! ... show more
Reviewed in the United States on February 17, 2025 by Fix it Guy

  • Great all around
Wow! I paired it with a pioneer GM-D9701 2,400W,1,200W RMS at 1 ohm perfect for the two subs. Wired the subs in series to take advantage of the 1,200W RMS and do they bump. Box is very well built. Installed it in my 2024 Silverado 1500 crew cab fits and looks amazing. Really satisfied with this product ... show more
Reviewed in the United States on February 11, 2026 by Roy

  • Sounds good and fits perfectly
I’ve had this installed for a few months now and it still works great.
Reviewed in the United States on April 20, 2025 by Reese James

  • Awesome bass
Great speakers...
Reviewed in the United States on June 24, 2025 by Fernando B.

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