Updated 17 May 2026
| Brand | Mackie |
| Category | Musical Instruments |
| Available at | 1 UK stores |
| 90-day avg | £758.00 |
Mackie
Mackie Thump 18S V4 18" Active PA Subwoofer
£733.00Fair Price
Cheapest at Gear4music · 1 store
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PRICE HISTORY
Current
£737
Change
+10.4%
Avg
£699
Low
£647
High
£744
Volatility
3.2%
PRODUCT DESCRIPTION
- Deep and powerful bass response The Thump18Sv4 pairs a 1400W Class-D amplifier with an 18-inch high-performance woofer to deliver extended low-frequency output. With a maximum SPL of 132 dB and low-end reach down to 25 Hz it provides the depth required for demanding PA applications. The efficient amplifier design supports consistent performance while maintaining reliable operation during extended use. Flexible crossover control Selectable high-pass modes allow the subwoofer to integrate with compatible loudspeakers including preset options designed for Thump series models. A variable crossover mode offers additional flexibility enabling manual adjustment to suit different systems. Each mode includes alignment delay to maintain timing between subwoofer and main speakers. Comprehensive connectivity options Stereo XLR inputs allow connection to mixers DJ controllers and other line-level sources. Stereo high-pass outputs provide a processed signal for loudspeakers while full-range outputs pass the unaltered signal for linking additional subwoofers. A stereo or mono summing option supports a range of system configurations. Designed for practical use The enclosure is built for durability and regular transport with integrated carry handles for easier handling between venues. An M20 threaded pole mount supports speaker pole installation when required. Additional controls including phase invert level adjustment and a defeatable front LED provide practical control during setup and operation. Features 1400W Class-D amplifier for efficient and reliable output 18-inch woofer delivers extended low-frequency performance Selectable high-pass modes for system integration Variable crossover control for tailored sound setup Stereo XLR inputs for connection to audio sources Stereo high-pass and full-range XLR outputs Phase invert switch and adjustable level control Built-in carry handles and M20 pole mount thread Specifications Frequency Response (-10 dB): 25 Hz &ndash
- 160 Hz Frequency Response (-3 dB): 33 Hz &ndash
- 160 Hz Maximum SPL Peak: 132 dB Low Frequency Transducer: 18 in / 457 mm woofer System Power: 1400 W peak Low Frequency Power: 1400 W peak Rated THD: <
- 1% Amplifier Design: Class D Cooling: Convection Input Type: 2 x Female XLR balanced Input Impedance: 10 k&Omega
- balanced Output Type: 2 x Male XLR full range 2 x high pass Output Impedance: 150 &Omega
- Full Range Output: Stereo / Mono Phase: Normal / Invert Line Input Power: 100&ndash
- 240V~ 50&ndash
- 60 Hz 400 W AC Connector: 3-pin IEC 250 VAC 10 A male Power Supply: Switchmode universal with PFC Protection: Peak and RMS limiting thermal protection Display LEDs: Front LED high-pass mode signal/overload Mounting: Floor or stage placement only (not riggable) Height: 541 mm Width: 630 mm Depth: 605 mm Weight: 31.9 kg