Powerful Low-Frequency Performance: The ZETHUS-VX118S line array subwoofer features an 18' woofer with a 4' voice coil (145 oz. magnet), delivering rich and solid low-frequency reinforcement. Its extraordinary 800W RMS (8O) power handling capability ensures exceptional sound projection. Sturdy and Mobile-Friendly: Crafted with high-quality plywood construction, the ZETHUS-VX118S line array subwoofer effectively dampens unwanted vibrations, providing reliable protection for mobile applications. Seamless Integration: Designed for use in a speaker array with the ZETHUS-112B line array speaker (sold separately), it creates a perfect PA system with great sound quality and versatile configurations.