DC Audio Level 4 18" Subwoofer

The DC Audio Level 4 18" Subwoofer is a high-performance, SQ-focused 18-inch woofer built for serious car audio setups that demand loud, controlled bass. It delivers 1500W RMS / 3000W peak and features a 23.5mm X-Max for substantial cone travel in the right enclosure.

• Power Handling (RMS / Peak): 1500W RMS / 3000W peak — provides significant headroom for dynamic bass bursts and sustained loud output when paired with an ample amplifier and proper enclosure.
• X-Max: 23.5 mm — indicates the woofer’s extreme excursion capability, enabling deep bass and impactful low-end response in a suitable enclosure.
• 2.5 mm Aluminum Shorting Ring (demodulation ring): reduces motor inductance and helps prevent power compression, while acting as an internal heatsink to pull heat from windings toward coil venting for improved cooling under heavy use.
• Motor assembly: large triple-stacked motor with chrome top plate and T yoke, engineered for high stiffness and consistent control, with 23.5mm of X-Max.
• Voice Coil: 3" hi-temp aluminum voice coil wound on a black anodized former — engineered to handle high temperatures and maintain coil integrity under demanding output.
• Cone and Surround: extremely rigid non-pressed paper cone with a multilayered polymer foam stitched surround and a polypropylene dust cover with DC logo — designed for durable, long-term excursion and restrained cone flex.
• Frame and Mounting: cast aluminum black frame with no invert mount and rubber mounting gasket; chrome spring-loaded push terminals for reliable connections.
• Lead Wire: upgraded lead wire sewn to the spider for improved durability under continuous movement.
• Impedance Options: Ohm options are d1/d2/d4 (dual 1, dual 2, dual 4-ohm configurations) to suit different amplifier loads and wiring schemes.
• Enclosure Guidelines: suggested sealed box 3.5 ft and ported box 5.5 ft for the 18" model, providing guidance to optimize bass extension and transient response in real-world builds.
• Physical dimensions (18" version): Mounting Depth 9.5", Mounting Hole Diameter 16.75", Outside Driver Diameter 18.5", VC Diameter 3.0" — ensures fitment planning for installations with limited space.

In a complete build, the Level 4 18" integrates with a capable amplifier and an appropriately sized enclosure to deliver precise, deep bass with strong control. The combination of the 2.5mm shorting ring, triple-stacked motor, and high-temperature coil design helps manage heat and inductance at high output, making it well-suited to premium SQ-focused systems that still demand substantial low-frequency impact.