MACKIE THUMP18SV4 - 18 inch 1400W Active Subwoofer

Live sound engineers and mobile DJs who need to reinforce the low end in clubs, outdoor stages, and event spaces will appreciate the MACKIE THUMP18SV4. This active subwoofer pairs an 18-inch high-excursion driver with a 1400W Class D amplifier to deliver deep, punchy bass that stays clean even at high volumes. The rugged 15mm plywood enclosure and powder-coated steel grille are built to withstand the rigors of touring, while integrated side handles and a pole mount make setup and transport straightforward.

Key specifications

• 18" high-excursion woofer with 3" voice coil
• Class D amplifier: 1400W peak power
• Frequency response: 40 Hz – 120 Hz (-3 dB), 30 Hz – 130 Hz (-10 dB)
• Maximum SPL: 132 dB
• Variable crossover: 60 Hz – 120 Hz
• Inputs: 2 x XLR female (balanced)
• Outputs: 2 x XLR male (full-range), 2 x XLR male (high-pass)
• Phase switch: 0° / 180°
• Enclosure: 15mm plywood, powder-coated steel grille
• Integrated pole mount and side handles
• Universal power supply: 100-240 VAC

Why choose it

The THUMP18SV4 delivers serious low-frequency output without the bulk of traditional subwoofers. Its built-in DSP includes a variable crossover, polarity reverse, and a Thump Boost mode that adds extra punch for bass-heavy genres. Thermal and overload protection circuitry ensures reliable performance night after night. Whether you're reinforcing a pair of full-range tops or building a ground-stacked system, this subwoofer integrates seamlessly and provides the foundation your mix needs.

Ideal use cases

• Live sound reinforcement for bands and DJs in clubs and outdoor venues
• Mobile DJ setups requiring powerful, portable bass
• Permanent installations in bars, gyms, and houses of worship
• Adding low-end extension to existing full-range speaker systems

Good to know

The THUMP18SV4 features a rugged plywood enclosure with a textured finish that resists scratches and wear. The integrated pole mount allows for easy deployment with a full-range top speaker, and the side handles make it a two-person lift. The universal power supply means you can use it anywhere in the world without a voltage converter.