Mackie Thump 18S V4 Subwoofer

Thump18Sv4 18” Active PA Subwoofer – Powerful bass for professional sound systems

The Thump18Sv4 is a professional 18-inch active subwoofer that delivers massive, deep bass and high sound pressure levels for PA systems. With a powerful Class D amplifier and rugged construction, it is built to withstand demanding use at live performances and events.

Key Features

18” high-performance woofer
1400 W Class D amplifier
Maximum sound pressure level: 132 dB SPL
Frequency down to 25 Hz
Adjustable crossover settings (high-pass)
Variable level control (Mute to +6 dB)
Polarity invert function
Mono/stereo summing

Flexible connections

Stereo XLR inputs
Stereo XLR high-pass outputs
Stereo XLR full-range outputs for daisy-chaining
Mono button for multiple subwoofers

Tailor the bass to your system

Multiple selectable high-pass modes:
Thump 12 (140 Hz)
Thump 15 (110 Hz)
Thump GO (150 Hz)
Variable mode for manual adjustment

All modes include 1.4 ms time alignment for optimal integration.

Built for professional use

Robust and durable construction
Integrated carrying handles for easy transport
M20 thread for stand mounting (speaker pole sold separately)
Front LED with on/off function

Dimensions and weight

Height: 541 mm
Width: 630 mm
Depth: 605 mm
Weight: 31.9 kg

Powerful performance for live shows and events

The Thump18Sv4 delivers deep, punchy bass that fills the room and elevates the entire sound experience. Perfect for DJs, live bands, and professional sound systems where power and reliability are essential.