Mackie SR18S Active Subwoofer

18-Inch Powered Subwoofer for Professional Low-End Extension

The Mackie SR18S pushes 1600 W of Class-D power into an 18-inch driver, extending to 33 Hz and achieving a maximum SPL of 133 dB. Handling all low-frequency content for your PA, the sub relieves top speakers to operate with improved headroom. Multi-band compression, managed by DSP, acts only where necessary to maintain tonal clarity even when pushed hard.

Custom Voicing Presets and Transparent Limiting

Select from three voicing modes—Flat, Deep, or Punch—to tailor the bass for electronic sets, rock shows, or general reinforcement. Unlike traditional limiters, the SR18S uses frequency-selective compression for powerful, undistorted sound.

Amplifier Power and Acoustic Output

With efficient Class-D topology, consistent output is delivered with minimal heat, which makes it dependable for long gigs or permanent installs.

• Amplifier Power: 1600 W — Class-D reliability keeps your system running strong during extended use
• Maximum SPL: 133 dB — plenty of output for medium-to-large venues or outdoor performances
• Custom 18-inch driver delivers a deep punch that fills the room with powerful low end.
• Frequency Range: 33 Hz – 20 kHz

Signal Routing and System Integration

Flexible I/O lets this model act as a hub for a multi-speaker array, taking care of crossover and signal distribution without extra processors.

• Inputs: Stereo XLR — connect mixers, DJ controllers, or stage boxes directly
• Outputs: Stereo high-pass XLR + stereo full-range XLR — send processed signal to satellite speakers without external crossovers
• Variable crossover frequency adjustment ensures seamless integration with your main speakers.

Road-Ready Construction and Deployment Options

The rugged wooden cabinet and steel grille are built to withstand transport and nightly use.

• Cabinet: Plywood with steel grille — crafted for durability on the road
• Pole Cup: Integrated M20 thread — compatible with standard speaker poles for raised setups
• Weight: 33.8 kg
• Dimensions: 592 × 584 × 686 mm