Mackie Thump18Sv4 18-Inch Professional Powered Subwoofer

The Mackie Thump18Sv4 18-Inch Professional Powered Subwoofer is designed for gigging professionals, DJs, venues, houses of worship, live sound engineers, mobile performers, and event production systems that need powerful low-frequency reinforcement. Built to bring more impact and depth to a PA setup, the Thump18Sv4 delivers massive bass performance for punchy kick drums, deep basslines, dance music, live bands, and full-range sound systems that need extra low-end energy.

Powered by a 1400W Class-D amplifier and equipped with an 18-Inch high-performance woofer, the Thump18Sv4 produces up to 132 dB maximum SPL with low-frequency performance down to 28 Hz. This combination gives the subwoofer the strength and extension needed to shake the floor while maintaining reliable, consistent output for professional audio applications. Whether paired with Mackie Thumpv4 loudspeakers or integrated into another PA system, the Thump18Sv4 helps bring music to life with a fuller, more powerful sound.

The Thump18Sv4 is built for flexible system integration with selectable high-pass modes that allow users to tailor the bass response to connected loudspeakers. Dedicated modes are available for Thump12v4, Thump15v4, and Thump GO speakers, while Variable Mode lets users manually set the crossover for other loudspeaker systems. Stereo XLR inputs, stereo XLR high-pass outputs, stereo XLR full-range outputs, phase invert, stereo or mono summing, variable level control, a defeatable front LED, rugged construction, built-in handles, and an M20 threaded pole mount make the Thump18Sv4 a dependable powered subwoofer for portable and installed sound systems.

Key Features

• 18-Inch professional powered subwoofer for DJs, live sound, venues, mobile PA systems, and event production
• 1400W Class-D amplifier delivers powerful and consistent low-frequency performance
• 132 dB maximum SPL provides high-output bass reinforcement
• 18-Inch high-performance woofer reaches down to 28 Hz for deep bass response
• Designed to complete a Thumpv4 PA system with professional low-end impact
• Selectable high-pass modes help tailor the bass response to connected loudspeakers
• Thump 12 mode supports Thump12v4 loudspeakers with a 140 Hz crossover
• Thump 15 mode supports Thump15v4 loudspeakers with a 110 Hz crossover
• Thump GO mode supports Thump GO battery-powered loudspeakers with a 150 Hz crossover
• Variable mode allows manual crossover adjustment for other loudspeaker systems
• All high-pass modes include 1.4 ms alignment delay
• Stereo XLR inputs connect to a DJ controller, mixer, or other audio source
• Stereo XLR high-pass outputs connect to loudspeakers with selectable high-pass filtering
• Stereo XLR full-range outputs allow chaining the unaltered signal to another subwoofer
• Phase invert switch helps with system alignment
• Stereo or mono summing supports single or dual subwoofer deployment
• Variable level control ranges from muted to +6 dB
• Defeatable front LED with front LED On/Off control
• Built-in handles support easier loading and transport
• Rugged, modern construction is built for demanding gig use
• M20 threaded mount supports the Mackie SPM400 speaker pole, sold separately

Technical Specifications

Product Type: Professional Powered Subwoofer
Subwoofer Size: 18-Inch
Amplifier Type: Class-D
Amplifier Power: 1400W
Maximum SPL: 132 dB
Low-Frequency Driver: 18-Inch high-performance woofer
Low-Frequency Performance: 28 Hz
High-Pass Modes: Thump 12, Thump 15, Thump GO, Variable
Thump 12 Crossover: 140 Hz
Thump 15 Crossover: 110 Hz
Thump GO Crossover: 150 Hz
Variable Crossover: Manually adjustable to match connected loudspeakers
Alignment Delay: 1.4 ms on all high-pass modes
Inputs: Stereo XLR inputs
High-Pass Outputs: Stereo XLR high-pass outputs
Full-Range Outputs: Stereo XLR full-range outputs
Phase Control: Phase invert switch
Summing: Stereo or mono summing for single or dual subwoofer deployment
Level Control: Variable level control, muted to +6 dB
Front LED: Defeatable front LED with On/Off control
Handles: Built-in handles
Construction: Rugged, modern construction
Pole Mount: M20 thread for Mackie SPM400 speaker pole, sold separately
Dimensions: 21.3" x 24.8" x 23.8"
Weight: 70.4 lbs

What's Included

• Mackie Thump18Sv4 18-Inch Professional Powered Subwoofer
• Power Cable