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Description
MTX C1500EX-07A ThunderForm Amplified 10” 250W RMS 4Ω Custom Loaded Subwoofer Enclosure for 2007-2018 Chevrolet Silverado / GMC Sierra Extended Cab (Black)MTX Audio C1500EX 07A ThunderForm Amplified 10" Subwoofer Enclosure 2007 2018 Chevy GMC Extended Cab FITMENT NOTE: Fits 2007 2018 Chevrolet Silverado & GMC Sierra 1500 2500 3500 Extended Cab (Double Cab). Also fits 2019 Silverado "LD" and 2019 Sierra "Limited" (Legacy Body Styles). Does NOT fit 2007 "Classic" old body style or 2019 Up New Generation trucks. The MTX C1500EX 07A ThunderForm is a custom engineered bass solution designed specifically for
MTX Audio C1500EX-07A ThunderForm Amplified 10" Subwoofer Enclosure – 2007-2018 Chevy/GMC Extended CabFITMENT NOTE: Fits 2007-2018 Chevrolet Silverado & GMC Sierra 1500/2500/3500 Extended Cab (Double Cab). Also fits 2019 Silverado "LD" and 2019 Sierra "Limited" (Legacy Body Styles). Does NOT fit 2007 "Classic" old body style or 2019-Up New Generation trucks.
The MTX C1500EX-07A ThunderForm is a custom-engineered bass solution designed specifically for the unique cabin acoustics of Chevrolet Silverado and GMC Sierra Extended Cab (Double Cab) trucks. This stealthy enclosure mounts directly under the driver’s side rear seat, utilizing otherwise wasted space to deliver massive low-end performance without sacrificing legroom. As an "Amplified" model, it features a built-in high-efficiency Class D amplifier that is precision-tuned to the pre-loaded 10-inch Terminator series subwoofer. Wrapped in aviation-grade black carpet to match your factory interior, the C1500EX-07A provides a seamless, integrated look with the "Loud and Clear" output that has made MTX a legend in truck audio.
Key Features
- Vehicle Specific Fit: Custom-tailored for 2007-2018 (and 2019 LD/Limited) Chevy/GMC Extended (Double) Cab models
- Stealth Installation: Fits perfectly under the driver’s side rear seat, maintaining a factory-stock appearance and full seat functionality
- Integrated Amplification: Built-in high-efficiency Class D monoblock amplifier delivering 250 Watts RMS (500 Watts Peak)
- High-Output 10" Subwoofer: Pre-loaded with a hard-hitting Terminator series subwoofer featuring a lightweight polypropylene cone and durable rubber surround
- Plug-and-Play Integration: Includes both RCA (low-level) and speaker-level (high-level) inputs for easy connection to any factory or aftermarket radio
- Smart Engage Technology: Automatically powers on the system when a signal is detected from the factory speaker wires (eliminating the need for a remote turn-on wire)
- Precision Tuning: Features a variable low-pass crossover (50Hz–150Hz) and includes an External Bass Control (EBC) for front-seat volume adjustment
- Premium Construction: Built from high-density, non-resonant MDF and finished in aviation-grade black carpet for durability and a factory match
- Acoustic Performance: Sealed enclosure with 1.0 cubic foot of internal volume for deep, accurate, and impactful bass response
- Frequency Response: 39Hz – 150Hz
- Dimensions: 16.31" H x 20.75" W x 8" D
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.0 ★★★★★
Based on 17 reviews
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Product Reviews
★★★★★ 5
Great watch!!!!
Color: Grey
Excellent quality, one of the best, elegant.
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Reviewed in the United States on May 6, 2026
★★★★★ 5
Excellent value for an automatic watch, keeps VERY good time.
Color: Grey, Color: Grey
I've only had the watch for a day but wanted to leave a quick review on it to share a couple of notes.
So far it keeps VERY good time, better than any of the automatics I own (including a Rolex Submariner, Tag Heuer Aquaracer, Tag Heuer Formula One, and several other sub $1k watches). I set it to an atomic time app on my phone yesterday and 24 hours later it's still SPOT on - hasn't gained/lost even a 1/10 of a second. I was shocked to see it's kept PERFECT time for the last day, I'm really blown away so far. I've worn it the entire time, we'll see how well it keeps time while being stored in a winder.
This picture shown is the watch with a 22mm leather band on it, fit's without any issues (just need to squeeze in the leather a tad). I doubt it would work with a 22mm metal bracelet, but leather works great. Just FYI since the 21mm lug width is kind of odd.
The face isn't quite a lustrious as the images make it look, but it's still a great-looking watch. For a sub $1000 automatic you can't go wrong, this is a fantastic watch at a great price. It'll be my daily driver for some time I'm sure. If I have any issues in the future I'll update the review.
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Reviewed in the United States on March 22, 2021
★★★★★ 5
It looks really cool and striking.
Color: Grey, Color: Grey
Really cool and beautiful watch. Although my specific unit runs 5 seconds fast every day—at first it’s annoying, but eventually you stop caring. 🤣
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Reviewed in the United States on April 16, 2026
★★★★★ 5
A Beautiful Timepiece at an Awesome Price!!
Color: Grey, Color: Grey
I have lusted after this watch for four months. I first tried on a similar model (stainless steel band with a green face) in a local jewelry shop (Spitz Jewlers, Walnut Creek, CA, USA). It was "love at first sight," even if I didn't love the white lines on the face from 12-6 and 3-9. At the time, the MSRP was $775.
The MSRP has since increased to $795. But I bought this beauty on Amazon.com for only $524.99; after applying the cash-back from my Prime credit card, this watch costs only $498.75. This was "the offer that I could not refuse," to quote from "The Godfather."
Accuracy could be better: after only a few days, it is now 7 seconds behind my phone (to which I set my new watch). But I don't really care about that all that much. This is why I rated "accuracy" at 4 stars, but my overall review is 5 stars.
My video shows the date changing suddenly at 11:59:59pm, just how I want it; in another photo, you can see that my Seiko changes the date more slowly, which I do not like.
This watch is absolutely phenomenally beautiful. If you're on the fence over whether to make this purchase, then I would say "go for it!" You will not find a prettier, more accurate watch at a lower price in ANY store in the entire USA.
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Reviewed in the United States on April 28, 2023
★★★★★ 4
Classy and sporty. Great value!
Color: Grey, Color: Grey
Excellent watch for the price. Looks sporty and dressy. More towards dress watch. Blue is dynamic. Strongly recommend blue for sporty feel. I was thinking of aqua terra. This come close to it with a price less than what i would have paid my state tax for omega aqua terra. My only concern is bracelet which i feel kind of OK. Better bracelet design would have made this watch much superior. 21 lug width is awful. Other than that, nothing to complain.
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Reviewed in the United States on July 13, 2020