Mackie Thump 18S v4 18 Inch Professional Powered Subwoofer
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Don’t sell your soul to a creditor to get the gear you need. At AMS, we want to lower the barriers to create. That’s why we offer in-house 0% financing, and you don’t even have to open a new line of credit! Spread out payments on your credit card to simplify financing and avoid hefty late fees or service charges. Cost shouldn’t interfere with your creativity.
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Most subwoofers promise big bass. The Mackie Thump18Sv4 actually delivers. This 18-inch powered subwoofer is built for gigging musicians, DJs, and anyone who refuses to settle for weak low-end. It doesn't just add bass to your PA system — it adds serious, room-filling, chest-thumping power that makes every performance hit harder.
Bass That Actually Does Something
There's bass, and then there's bass you feel in your chest. The Thump18Sv4 falls firmly into the second category. Its 18-inch woofer pushes deep, powerful low-frequency energy that fills rooms without turning into a muddy, indistinct mess. Kick drums hit with surgical punch. Basslines breathe and move. The crowd responds before they even realize why.
Massive, Floor-Shaking Low-End Output: The Thump18Sv4 energizes crowds and fills venues with a deep, physical low-end presence that your audience will feel as much as hear.
Complex Bassline Reproduction: Not all subwoofers handle musical nuance well. The Thump18Sv4 does, keeping basslines defined and punchy rather than collapsing them into a low-frequency blob.
Punchy Kick Drum Response: Fast, tight, and impact-driven, the sub handles transients cleanly so your kick cuts through the mix instead of disappearing into it.
Plug In, Dial In, Done
Setup shouldn't require an engineering degree or a 40-minute sound check. The Thump18Sv4 is designed to integrate directly with Thump loudspeakers through built-in voicing modes that do the heavy lifting for you — automatically tailoring the crossover and response to match your specific speaker configuration. For those who prefer a hands-on approach, manual crossover adjustment gives you precise control over where the sub hands off to your tops.
Automatic Voicing Modes for Thump Loudspeakers: Pair the Thump18Sv4 with Thump tops and the system intelligently optimizes its output to match, giving you a coherent, unified PA without the usual fiddling.
Manual Crossover Adjustment: For engineers who want control rather than convenience, the manual crossover lets you dial in the exact crossover point for any loudspeaker combination in your rig.
Balanced XLR Inputs with Full-Range or High-Pass Outputs: Clean, professional signal routing keeps noise out of the chain and gives you flexible connectivity for a wide range of PA configurations.
Built Tough and Portable
A subwoofer that's powerful but impossible to move is a permanent installation, not a gigging tool. Mackie designed the Thump18Sv4 with portability in mind, so it pulls its weight on stage without making your back pay for it afterward. Integrated carry handles make transporting the sub manageable, while its robust protection circuitry keeps it running reliably through the long haul of a touring schedule.
Integrated Carry Handles: Because your roadie is a person, not a forklift. The built-in handles make loading, unloading, and repositioning the sub significantly less dramatic.
Peak, RMS, Thermal, and Power Supply Protection: Comprehensive onboard protection keeps the Thump18Sv4 performing consistently even when the gig gets loud, long, and a little chaotic.
Touring and Gigging Ready: Compact enough to slot into a touring rig, durable enough to handle the realities of regular transport and back-to-back events without skipping a beat.
The Low End Your PA System Has Been Waiting For
Adding a subwoofer doesn't just make your system louder — it adds the deep bass your audience actually wants to hear (and feel). The Mackie Thump18Sv4 connects directly to Thump speakers, sets up in minutes, and is tough enough to survive regular transport in your trunk. If your current setup sounds a bit thin, this is the upgrade you need.
Mackie Thump18Sv4 Features:
18-inch powered professional subwoofer
Massive, floor-shaking low-end output for live PA applications
Deep, powerful bass reproduction for complex basslines and punchy kick drums
Seamless integration with Thump loudspeakers via built-in voicing modes
Automatic crossover optimization matched to connected speaker size
Manual crossover adjustment for precise low-frequency control
Balanced XLR inputs with full-range or high-pass output options
Peak, RMS, thermal, and power supply protection circuitry
Integrated carry handles for portability
Suitable for touring rigs, gigging setups, and installed applications
Warranty: All SRM, DLM, HD, iP and C Speakers, Reach, PPM Mixers, HRmk2 Studio Monitors: 3 Year inclusive of electronics, 2 Year drivers (where applicable), nontransferable; Thump, Freeplay, Onyx Mixers and Interfaces, DL, VLZ4, ProFX mixers, MRmk3 Studio Monitors, Big Knob, MCU Pro Series, SP260, FRS Series Amplifiers, CR, Mixer & Loudspeaker Bags/Covers/Hardware: 1 Year Non-Transferable;
FreePlay Lithium Ion Battery: 90 Day all inclusive, nontransferable; B-Stock items, 90 Days
Mackie Thump 18S v4 18 Inch Professional Powered Subwoofer Specifications
Mackie Thump 18S v4 18 Inch Professional Powered Subwoofer Specifications
Product Specifications
Frequency Response: 25 Hz – 160 Hz
MAX SPL: 132 dB
Peak Wattage: 1400W
Driver Size: 18" woofer
Inputs: 2x Female XLR balanced
Outputs: Main XLR balanced [Full Range & High Pass]
Protection: Peak and RMS limiting, power supply and amplifier thermal protection
Frequently Asked Questions
The Thump18Sv4 is built for live sound applications where powerful, controlled bass is a priority – think DJ setups, live bands, clubs, and mobile PA rigs. It pairs particularly well with Mackie Thump loudspeakers for a seamless, integrated system.
Yes, while it integrates most seamlessly with Thump loudspeakers via its automatic voicing modes, the manual crossover adjustment and balanced XLR outputs make it compatible with virtually any PA loudspeaker. You just handle the tuning yourself rather than letting the sub do it automatically.
The built-in voicing modes detect or allow you to select the size of your connected Thump loudspeakers and automatically adjust the crossover and low-frequency response to match. It's designed to save setup time and deliver optimized performance without manual tuning.
It performs well in outdoor environments where bass dispersion is naturally reduced, providing the low-end power needed to fill open-air spaces. That said, for very large outdoor events, pairing multiple units or a larger dedicated subwoofer system may be more appropriate.
Weighing in at 70lbs, it's very manageable for a professional 18-inch subwoofer. The integrated carry handles make single-person transport realistic for short distances, and its road-ready build handles regular loading and unloading without issues. If you're running a mobile rig solo, it's one of the more practical 18-inch options on the market.
