• EXTREME 18-INCH BASS OUTPUT: High-output 18" subwoofer engineered for massive low-frequency impact in competition-level and extreme street audio systems
• DUAL 1-OHM VOICE COILS: Dual 1-ohm configuration provides flexible wiring options for high-power monoblock amplifier setups
• HIGH-TEMPERATURE VOICE COIL DESIGN: 3.5" 8-layer flat-wire voice coil built to handle extreme power levels with improved thermal stability and reliability
• HEAVY-DUTY MOTOR STRUCTURE: Triple-stacked high-energy magnet assembly delivers strong magnetic force for deep, controlled bass performance
• LOW-DISTORTION CONE ASSEMBLY: Carbon fiber reinforced cone with foam surround and carbon fiber dust cap for rigidity, durability, and accurate bass reproduction
• ADVANCED COOLING SYSTEM: Direct cooling T-yoke with black anodized treatment promotes efficient heat dissipation during extended high-output use
• RIGID DIE-CAST BASKET: Green textured die-cast aluminum basket provides superior structural strength and vibration resistance

American Bass 18" Dual 1-Ohm 4700 Watt RMS Triple Stack Subwoofer GODZILLA-18-D1

This Listing Includes:

• (1) American Bass 18" 1-Ohm Subwoofer GODZILLA-18-D1

The American Bass GODZILLA-18-D1 is a no-compromise 18-inch subwoofer built for extreme low-frequency output, massive power handling, and long-term durability in high-demand car audio systems. Designed for serious bass enthusiasts and competition-driven builds, this subwoofer delivers commanding low-end authority with the control needed to survive sustained high-output use.

At its core is a 3.5-inch 8-layer high-temperature flat-wire voice coil, engineered to handle extreme power levels while maintaining thermal stability. Rated for up to 12,000 watts peak, the GODZILLA-18-D1 is built to thrive under aggressive amplification. A triple-stacked high-energy magnet structure provides the magnetic force necessary for strong cone control and deep, forceful bass reproduction.

The cone assembly combines a carbon fiber reinforced cone, foam surround, and carbon fiber dust cap to maximize rigidity while minimizing unwanted distortion during high excursion. To support extended play at high output, the subwoofer features a direct cooling T-yoke with black anodized treatment, allowing heat to dissipate efficiently and reducing the risk of thermal overload.

Structurally, the subwoofer is housed in a green textured die-cast aluminum basket, offering superior strength, vibration resistance, and long-term reliability. Dual mirrored black spiders stabilize cone movement under heavy load, while 4-gauge copper push terminals ensure secure, high-current electrical connections for large amplifiers and upgraded electrical systems.

With extensive Thiele & Small parameters provided, the GODZILLA-18-D1 is well suited for custom enclosure design, especially in high-output ported configurations where maximum displacement and efficiency are required. When paired with proper amplification and electrical support, this 18-inch subwoofer delivers relentless bass output that defines the Godzilla name.

Features:

• Green Textured Finish Die-Casting Basket


• Carbon Cone Foam Surround


• 3.5" 8-Layer High-Temperature Resistant Flat Wire Voice Coil


• Carbon Fiber Dust Cap


• Triple Stacked High-Energy 425oz Magnets


• Direct Cooling Design T-Yoke with Black Anodized Treatment


• Double Black Spider with Mirrored Layout


• 4GA Copper Push Terminal

Specifications:

• RMS Power Handling: 4700 Watts


• Maximum Power Handling: 12,000 Watts


• Impedance: Dual 1-Ohm


• Sensitivity: 86.2 dB


• Voice Coil Diameter: 3.5 inches


• Basket Type: Die-Cast Aluminum


• Magnet Structure: Triple-stacked high-energy magnets


• Recommended Enclosure Type: Ported


• Recommended Amplifier: American Bass Godfather 11D

Thiele & Small Parameters

• Sd: 1.182K


• Md g: 250


• BL: 35


• Qms: 5.19


• Qes: 0.37


• Qts: 0.34


• No: 0.259


• SPL dB: 86.2


• Vas L: 47.12


• Cms: 23.75


• Krm: 93.01


• Erm: 0.65


• MMS g: 1390K


• MMd: 1.366


• Kxm: 213.4


• Exm: 0.58


• Xmax mm: 22.5

Dimensions:

• Diameter: 465mm/18.30in


• Mounting Depth: 308mm/12.12


• Overall Depth: 426mm/16.77in


• Magnet Diameter: 130mm/5.11in