18″ C5 Series Subwoofer — Dual 2 ohm, 7500 W RMS

The Concrete Audio C518D2 is a massive 18″ C5 Series subwoofer engineered for serious low-end impact and competition-level performance. Featuring a dual 2 ohm voice coil configuration and 7500 W RMS power handling (15000 W maximum), this driver delivers deep, powerful bass that dominates sealed or ported enclosure builds — ideal for SPL competition rigs, show vehicles, and high-output custom systems.

Built for heavy use and maximum excursion, the C518D2 combines a reinforced gloss grey die-cast aluminum basket, high-roll foam surround, and glass fiber reinforced paper cone with gloss carbon fiber dust cap for strength and responsiveness. A 5″ eight-layer high-temperature USA voice coil and 215 oz premium magnet provide stable thermal performance and robust motor force under extreme load conditions. 

Key Specs:

• Driver Size: 18″ subwoofer

• Power Handling: 7500 W RMS / 15000 W max

• Impedance: Dual 2 ohm

• Basket: Reinforced gloss grey die-cast aluminum 

• Voice Coil: 5″ eight-layer high-temp USA coil 

• Magnet: 215 oz premium grade 

• Surround: High-roll foam

• Cone: Glass fiber reinforced paper with gloss carbon fiber dust cap 

Built to handle extreme power with tight control and deep, authoritative low end, the C518D2 is a flagship-level driver for serious audio builds.