Sky High Car Audio FXXL 18” Subwoofer – 5000W RMS Ferrite D1/D2

Sky High Car Audio FXXL 18” Subwoofer – 5000W RMS Ferrite D1/D2

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The Sky High Car Audio FXXL Series 18” Subwoofer is the top-dog ferrite woofer in the Sky High lineup—built for extreme demo builds, full walls, and competition systems where you want maximum cone area and real 5000 watt RMS performance. With a 4” 8-layer high-temperature voice coil and a massive multi-stack ferrite motor, this 18 inch sub is designed to live on big Korean or Brazilian amps when the electrical, wiring, and enclosure are done right.

This FXXL 18 is all about huge output with real control. The oversized motor structure is engineered for strong motor force (high BL), deep low-frequency extension, and stability at high excursion. Internal venting, pole vents, and an intelligently vented gap help manage heat during long demos so the woofer can stay pounding without falling off as it gets hot.

Mechanically, the FXXL Series uses a large progressive spider pack, fiberglass cone support, and a hardened paper cone paired with a forged-carbon style dust cap. That combo keeps the moving assembly stiff and stable at full throw, while the precision-molded foam surround and internal pressure cap are tuned for strength, control, and durability under extreme use. This is built for serious 18” abuse—walls, tunnel builds, big SUVs and vans, and high-output demo rigs.

Like the rest of the FXXL lineup, the 18” carries Sky High’s stealth all-black look with a tooled magnet boot and heavy-duty push terminals that accept large-gauge wiring. It’s a purpose-built 18 inch bass driver for people who are done with entry-level gear and want something they can truly lean on.

Available in dual 1 ohm (D1) and dual 2 ohm (D2) voice coil options, the FXXL 18 gives you the flexibility to run a single monster sub or multiple 18s on serious power at low impedance. Perfect for 4th and 6th order walls, big ported boxes, and high output daily/demo rigs.

Key Features – Sky High Car Audio FXXL 18” Subwoofer

• Size: 18 inch FXXL Series ferrite subwoofer

• RMS Power: 5000W RMS (with proper electrical, wiring, and enclosure)

• Voice Coil: 4” 8-layer high-temperature voice coil for extreme thermal handling

• Motor: Huge multi-stack ferrite motor engineered for high BL, deep lows, and strong cone control at high excursion

• Suspension: Oversized progressive spider pack and precision-molded surround for long throw and reliability

• Cone Assembly: Hardened paper cone with forged-carbon style dust cap and internal pressure cap for added strength and stability

• Impedance Options: Dual 1 ohm (D1) and dual 2 ohm (D2) configurations

• Terminals: Heavy-duty push terminals designed for large-gauge speaker wire

• Visuals: Stealth all-black FXXL cosmetics for a clean, aggressive look in show builds and walls

Best For

• High-power 18” ported enclosures

• 4th and 6th order bandpass walls

• Multi-18 demo builds and competition-style systems

• Loud daily driver setups where you want true 5k-class 18 inch performance

If you’re ready to build a true big-boy 18 inch system, the Sky High Car Audio FXXL Series 18” Subwoofer is the centerpiece to start with—huge motor, serious coil, real 5000W RMS capability, and Sky High’s proven build quality, backed by the crew at AudioSellerz.com