MACKIE SR18S - 18" 1600W Self-Powered PA Subwoofer

MACKIE SR18S - 18" 1600W Self-Powered PA Subwoofer

The Mackie SR18S is an 18" powered subwoofer that brings deep, punchy bass extension to any PA system. Its 1600W peak Class D amplifier delivers abundant, reliable power, with transparent limiting and thermal protection to ensure consistent performance under any load. The high-efficiency 18" woofer reproduces frequencies from 33Hz to 200Hz with a peak SPL of 133dB , adding distortion-free impact to your sound.

It features Advanced Impulse™ DSP for real-time acoustic tuning and voicing modes (Flat, Deep, Punch) that allow you to tailor the bass character to your application. A variable crossover and phase inversion switch facilitate integration with main speakers, while the integrated M20 pole cup allows you to elevate satellites without additional accessories. Additionally, the SRT Connect™ app offers wireless control of EQ, levels, and presets, as well as stereo or dual-zone pairing of two SR18S subwoofers.

Main features

• 18" (457 mm) high-efficiency woofer
• 1600W Peak Class D Amplifier with Transparent Limiter
• Frequency response: 33 Hz – 200 Hz (±3 dB)
• Maximum peak SPL: 133 dB
• Advanced Impulse™ DSP with Flat, Deep and Punch modes
• Variable crossover and phase inversion switch
• 2 balanced XLR inputs; 2 high-pass XLR outputs and 2 full-range XLR outputs
• Integrated M20 pole cup for satellite mounting
• Wireless control via SRT Connect™ app and pairing of two units
• Peak, RMS and thermal protections
• Dimensions: 592 × 584 × 686 mm
• Weight: 33.8 kg

User benefits

• Deep, clear bass for concerts, DJ sets, and events
• Instant adaptation to the venue and musical style
• Seamless integration with satellite speakers and existing systems
• Easy setup and remote control via app
• Rugged “Built-Like-A-Tank™” construction for touring and rental use

Use cases

• Bass reinforcement in PA systems for bars, clubs, and auditoriums
• Backline on band and solo tours
• Bass support for conferences and corporate presentations
• Outdoor events and festivals
• Fixed installations in places of worship and cultural centers

Frequently Asked Questions

• Can I use two SR18S in parallel?
  Yes: Pair two units from the SRT Connect™ app in stereo or dual-zone mode.
• How do I optimize the crossover with my satellites?
  Adjust the variable crossover and phase to achieve a smooth transition between sub and satellite.
• Do I need special cables?
  Uses balanced XLR cable for inputs and outputs, and a standard IEC cable for power.

Description for projects

18" powered subwoofer with 1600W peak Class D amp; 33Hz–200Hz response; 133dB peak SPL; Advanced Impulse™ DSP; Flat/Deep/Punch modes; variable crossover; phase inversion; 2× XLR in, 2× XLR HPF, 2× XLR full-range out; M20 pole cup; SRT Connect™ app; dimensions 592×584×686 mm; weight 33.8 kg.