SKU: 99894687669

Sky High Car Audio - FXXL Series 15”

Sale price$675.00 Regular price$750.00
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Ships within 48 hours · Estimated delivery Jul 21 - Jul 26

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Description

Sky High Car Audio - FXXL Series 15”Sky High Car Audio FXXL Series Subwoofers Our Ferrite Flagship. Purpose Built to Punish The FXXL Series from Sky High Car Audio is the peak of subwoofer engineeringour no compromise solution for those who demand maximum output, precision control, and true competition grade performance. Backed by years of technical experience and hands on development across multiple high performance audio brands, the FXXL Series reflects the very best of everything

Sky High Car Audio FXXL Series Subwoofers

Our Ferrite Flagship. 

Purpose Built to Punish 

The FXXL Series from Sky High Car Audio is the peak of subwoofer engineering—our no-compromise solution for those who demand maximum output, precision control, and true competition-grade performance. Backed by years of technical experience and hands-on development across multiple high-performance audio brands, the FXXL Series reflects the very best of everything we’ve learned in one elite platform.

At the core of the FXXL Series is a massive 4” 8 layer high-temp voice coil, engineered for power handling and consistent output under extreme demand. Rated at 5000W RMS, this coil provides increased surface area and thermal mass, resulting in cooler operation and significantly more headroom than even our FMX series. The FXXL series bridges the gap between SPL monsters and daily drivability. 

Driving that power is a towering quad-stacked 9.96” (253mm) Y35 ferrite motor structure, is packed with features like an aluminum shorting ring, pole vents and (4) drilled and tapped backplate holes, giving builders flexibility for reinforced mounting or enhanced cooling. Our motor design results in maximum airflow and heat dissipation during high-output demos.

Mechanically, the FXXL uses a full 10” progressive spider pack paired with a fiberglass cone support and a hardened paper cone. The cone is tooled with a recessed cavity to seat the standard forged carbon fiber dust cap, increasing structural integrity at peak excursion. The surround is precision-molded foam, delivering control, compliance, and longevity across extreme stroke conditions. To round out the features we utilize a secondary pressure cap nestled under the primary cap which works as a pressure buffer and structural reinforcement to the primary cap.  

Aesthetically, the FXXL Series carries the Sky High signature stealth look—all black with a carbon dust cap, tooled SHCA magnet boot, and oversized push terminals to ensure secure, high-current connectivity. Every design detail, from the cone geometry to the airflow path, was made to maximize both performance and reliability.

Engineered with low FS and high BL, the FXXL plays strong across the entire bass frequency spectrum with precision, power, and musicality…is that a word? Anyways…It’s not just about being loud—it’s about being the best at every level.

Box Designs: Sky High Car Audio is proud to partner with Hunter Martin from EZ DB’s, one of the most respected and proven enclosure designers in the industry. We’ll be offering FREE box designs—including ported, 4th order, and 6th order options where applicable—tailored specifically for our subwoofers to ensure maximum performance and reliability. As a bonus, any customer who purchases 4 or more BMX, FMX, or FXXL series subwoofers directly from Sky High Car Audio will receive a $50 credit toward a custom enclosure design from EZ DB’s, giving you a serious head start on a professionally designed, competition-ready subwoofer enclosure. Every SHCA subwoofer is tested using DATS-LA, measured with the backplate off the surface after full break-in, ensuring accurate and trustworthy TS data. 

SHCA-FXXL-15 Enclosure Designs

Customization Options: Sky High Car Audio is proud to offer in-house custom build options for select subwoofer lines, hand-assembled at our Sparks, NV facility. Customization is available exclusively on the BMX Series 10–18”, FMX Series 12–18”, and FXXL Series 12–18” models. We offer custom Prismatic Powders powder coating in single-stage or two-stage finishes to match your build’s aesthetic (additional cost and lead time apply). For those looking to stand out in the lanes or the show floor, forged carbon fiber cone upgrades are available on FMX and FXXL subs for a premium finish and added cone rigidity. Builders can choose between direct leads (with length and color options) or push terminals on FMX and FXXL models, which come standard with direct leads. We also offer box support add-ons for our threaded backplates and optional back plate cooling modifications for all eligible series (back plate cooling to drop 1/1/26). Lastly we can build you a custom spider pack to meet your needs, but for daily music we highly suggest the stock build form for suspension.  

FXXL: Purpose Built to Punish

Welcome to the Sky High Car Audio Revolution.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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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]
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SKU: 99894687669

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4.9 ★★★★★
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Verified Purchase
Beth Olson
Boise, US
★★★★★ 5
Single greatest thing I’ve ever bought for my dogs
Color: Charcoal, Size: 35" x 23"x 3.5", Color: Charcoal, Size: 35" x 23"x 3.5"
Few years ago we got our dog a dog. It was a bad idea. Our first dog is incredibly smart. He’d much rather hang out with humans, sitting in his own chair at the table while we play board games and chat than chase a ball. He uses talking buttons and picked it up quickly. Even as a little puppy he was kind of serious and when we’d take him to the dog park he’d mostly just run around barking at other dogs who were having too much fun. Then came his brother who turned out to be the absolute opposite in every way. A silly, goofy, snuggly, floppy little muppet of a dog. Highly empathetic and Looooves to make people laugh. Our other dog mostly wanted nothing to do with him, barely tolerating him at the best of times. We thought, surely he’ll learn to love his brother. But 3 years later… nope. Our first dog loves a good pillow so I thought this might make a good gift. I had no idea just HOW good. For some reason ever since our dog opened this gift he’s been obsessed. But so has our other dog. We initially were worried it would become one more thing for them to fight over BUT we were wrong. The dogs have been getting a long SO well! As long as it’s on this pillow, our first dog allows our second dog to come close enough to touch him. They sleep next to each other, they wrestle, there’s no growling or grumping and our first dog will come over and lay next to his brother if he’s laying on this. We’ve started calling it The Peace Pillow. Anyway, I could have just said “it’s great” but it might actually be magic. Your experience may vary.
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Reviewed in the United States on January 12, 2026
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Verified Purchase
Natasha Izquierdo
San Leandro, US
★★★★★ 5
Super soft, cozy, and great quality Dog Bed
Size: Small 24"x18", Color: White, Size: Small 24"x18", Color: White
This pet mat exceeded my expectations. The material is incredibly soft and plush, and you can tell right away that it’s made with comfort in mind. My pet laid on it immediately, which is always the best sign. It provides just the right amount of cushioning without being too thick or heavy. The quality is excellent — the stitching feels sturdy, the fabric doesn’t shed, and it holds its shape well with regular use. It’s lightweight and easy to move around, making it perfect for use in crates, on the floor, or even on furniture for extra protection. Cleaning is simple, and it still looks great after use. Overall, this mat offers great durability, ease of use, and excellent value for money. It’s stylish, practical, and extremely comfortable for pets. I would absolutely recommend this to anyone looking for a cozy, high-quality mat for their dog or cat 🐾
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Reviewed in the United States on December 24, 2025
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Verified Purchase
Ryan
Houston, US
★★★★★ 5
Cushion for the pooch’n
Size: Small 24"x18", Color: Brown
I’ve been using the ULIGOTA Dog Bed Crate Pad Plush Soft Crate Bed in my dog’s crate for daily resting and overnight sleep. Right out of the package, it’s clearly designed for comfort first. The plush top feels soft and inviting, and it immediately makes the crate look more like a cozy sleeping space rather than a hard plastic tray. Once fluffed up, it provides a decent layer of cushioning that’s noticeably more comfortable than a bare crate floor or thin mat. In terms of fit, it sits well inside standard crate sizes and doesn’t bunch up too badly once settled. The anti-slip bottom helps keep it in place during normal movement, which is especially helpful for dogs that reposition a lot while sleeping. Comfort-wise, it works well for small to medium dogs that just need light padding. It’s warm and soft enough for everyday use, and most dogs seem to settle into it quickly. However, it’s not a high-density or orthopedic-style bed, so it doesn’t offer much support for dogs that need joint relief or extra structure. Durability is average. It holds up fine under normal sleeping use, but it’s not ideal for heavy chewers or dogs that dig aggressively. Like most plush crate pads, it’s more of a comfort layer than a rugged long-term solution. Pros: very soft plush surface, comfortable for everyday crate use, easy fit in standard crates, non-slip backing helps stability Cons: not chew-resistant, limited support for heavier or senior dogs, cushioning is on the thinner side Overall: a solid, budget-friendly crate pad that improves comfort and warmth significantly over a bare crate, but best suited for calm sleepers rather than heavy chewers or dogs needing orthopedic support.
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Reviewed in the United States on April 19, 2026
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Verified Purchase
Courtney D
Whiting, US
★★★★★ 5
Soft dog bed perfect for small breeds
Size: Medium 30"x20", Color: White
This dog bed is very soft and fit perfectly in my dogs crate. I like that it came vacuum sealed and was really easy to open and leave out to expand. The material is durable and it is perfect thickness for a small breed dog. My Maltese puppy loves it and has been sleeping so well on it, she is very comfortable. The material is durable and easily washable, I already had to run it through the washing machine. Well worth the price and easy to fit in a crate or small space.
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Reviewed in the United States on April 23, 2026
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Verified Purchase
Txn
Boise, US
★★★★★ 4
fluffy
Size: Small 24"x18", Color: White
good bed and fairly durable for chewers but when torn, stuffing everywhere. also useful as a toy for smaller dogs.
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Reviewed in the United States on January 5, 2026

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