Mackie Thump18Sv4 – powerful 1400W active PA subwoofer with ultra-deep 25 Hz bass If you want your PA system to truly make an impact, you need a subwoofer that delivers serious low-end energy. The Mackie Thump18Sv4 is the most powerful model in the series, built for professionals who demand maximum performance, deep bass, and reliability in any environment.

With 1400W of Class-D power and an impressive maximum SPL of 132 dB, this subwoofer easily handles large venues, stages, and events. Its 18” high-performance woofer reaches down to 25 Hz, producing massive, floor-shaking bass that’s perfect for electronic music, DJ sets, and live performances.

Product features 1400W Class-D amplifier – powerful, efficient performance 132 dB SPL – massive output for large-scale events Frequency response down to 25 Hz – ultra-deep, impactful bass 18” high-performance woofer Selectable high-pass modes for optimal speaker integration Modes: Thump 12, Thump 15, Thump GO, Variable Adjustable crossover for custom system tuning Stereo XLR inputs and outputs High-pass outputs for connecting loudspeakers Full-range outputs for signal chaining Phase invert switch Variable level control (Mute to +6 dB) Stereo or mono operation Defeatable front LED Rugged construction for professional use Built-in carry handles M20 threaded pole mount Extreme bass you can feel The Thump18Sv4 is the foundation of a truly powerful sound system. With its 18” driver and deep extension to 25 Hz, it produces massive low-frequency waves that energize any performance. Ideal for DJs, live bands, and events where bass is a key element.

Perfect system integration Built-in high-pass modes allow easy matching with Thump series speakers or any PA system. You can also fine-tune the crossover manually for a perfectly balanced sound.

Flexible connectivity Stereo XLR inputs make it easy to connect mixers, DJ controllers, or other audio sources. High-pass outputs deliver optimized signals to your speakers, while full-range outputs allow you to chain multiple subwoofers together.

Build a complete PA system Pair the Thump18Sv4 with Mackie Thumpv4 loudspeakers to create a powerful all-in-one PA setup. The M20 threaded pole mount lets you place a speaker directly on top of the subwoofer for a compact and professional configuration.

Technical specifications Power: 1400W (Class D) Maximum SPL: 132 dB Frequency response: from 25 Hz Low-frequency driver: 18” Inputs: stereo XLR Outputs: stereo XLR (high-pass + full-range) High-pass modes: Thump 12, Thump 15, Thump GO, Variable Alignment delay: 1.4 ms Phase invert: yes Level control: Mute to +6 dB Operation modes: mono / stereo Pole mount: M20 thread Dimensions: 541 x 630 x 605 mm Weight: 31.9 kg Built for the stage The rugged enclosure is designed for demanding live environments while remaining manageable for transport. Built-in handles make loading and setup easier, making it suitable for both mobile and installed systems.

What’s included The package includes the Mackie Thump18Sv4 active subwoofer.

Why choose this model? If you need maximum low-end power and uncompromising performance, the Mackie Thump18Sv4 is the perfect choice. A professional subwoofer that transforms your sound system and delivers an unforgettable experience.