Mackie SR18S 18-inch 1600W Powered Subwoofer

The Mackie SR18S is a professional powered subwoofer engineered for demanding live sound environments. Built around an 18-inch woofer driven by a 1600W Class-D amplifier, it produces a maximum SPL of 133dB and covers a frequency range of 33Hz to 200Hz — delivering the kind of deep, physical bass that audiences feel as much as hear. The Class-D amplifier design keeps the unit more efficient and cooler-running than traditional amplifier topologies, which is a practical advantage during long events.

Mackie has included three custom voicing presets — Flat, Deep, and Punch — that let sound engineers quickly adapt the subwoofer's character to the event at hand without reaching for external processing. The variable crossover provides fine control over the handoff point between the sub and full-range speakers, while stereo/mono summing and dedicated full-range and high-passed outputs make system configuration straightforward. Whether paired with Mackie tops or integrated into a mixed-brand PA rig, the SR18S is designed to serve as a dependable low-frequency foundation for bands, DJs, houses of worship, and event production companies.