Mackie Thump18Sv4 18" Powered Subwoofer

When the bass drops, your system needs to deliver more than volume—it needs controlled, extended low end. The Mackie Thump18Sv4 18" powered subwoofer provides that foundation with a 1400W Class-D amplifier, 132dB maximum SPL and low-frequency extension down to 25Hz, supporting demanding live sound and DJ applications. Its high-performance 18" woofer is paired with selectable crossover modes, variable crossover control, stereo XLR inputs and outputs and onboard system controls that simplify integration. Whether you're reinforcing live music or building a full-range DJ setup, this professional-caliber subwoofer adds depth and definition to your mix.

Optimized Low-End Integration for PA Systems

The Thump18Sv4 is designed to integrate efficiently with a wide range of loudspeakers, including dedicated high-pass modes optimized for Thump12v4, Thump15v4 and Thump GO systems. These preset modes help streamline setup by aligning crossover behavior with compatible tops, while a variable crossover setting allows for precise adjustment when working with other PA configurations. This flexibility supports a smoother transition between subwoofer and full-range speakers, helping maintain clear, controlled low-end response across your system.

Flexible Connectivity for Live and DJ Setups

With stereo XLR inputs, the Thump18Sv4 connects easily to mixers, DJ controllers and other line-level sources. High-pass outputs route optimized signals to your main speakers, while full-range outputs allow for straightforward chaining of additional subwoofers when expanded coverage is required. Features such as mono summing, adjustable level control and a phase invert switch provide practical tools for dialing in system balance across different venues and performance environments.

Road-Ready Design for Consistent Performance

Built for the demands of regular transport and setup, the Thump18Sv4 features a rugged enclosure designed for reliable use in live environments. Integrated handles support easier loading and positioning, while the durable construction maintains consistent performance across clubs, venues and event spaces. For DJs, bands and live sound users who need professional-quality low-end reinforcement, the Mackie Thump18Sv4 18" powered subwoofer delivers extended bass response in a practical, gig-ready design.