The DS18 PSW8.4D shallow-mount subwoofer is built for powerful bass in compact installations where space is limited but performance is not optional. This 8-inch low-profile subwoofer delivers 400W RMS and 800W MAX, making it the perfect upgrade for trucks, SUVs, and custom builds that require serious low-end without a deep enclosure. With a mounting depth of only 3.5 inches and total depth of 4 inches, the PSW8.4D fits cleanly into under-seat enclosures and slim truck boxes while still reaching frequencies as low as 20Hz. Its dual 4-ohm voice coils provide flexible wiring options, allowing you to configure your system for maximum efficiency and amplifier compatibility. Designed for durability, this shallow subwoofer features a water-resistant paper cone reinforced with aluminum, a high-roll rubber surround, and a 2-inch aluminum voice coil for improved heat dissipation. The ferrite motor structure delivers consistent power handling and stability during extended high-volume play. Whether you are building a stealth truck system or upgrading a compact car audio setup, the DS18 PSW8.4D delivers deep, controlled bass with accuracy, strength, and long-term reliability.