Mackie THUMP18SV4 18" Powered Subwoofer

The Mackie THUMP18SV4 is an 18” powered subwoofer engineered to anchor DJ and live PA setups with authoritative low-end extension. Built around a 1400W Class-D amplifier, it delivers 132 dB maximum SPL and reaches down to 25 Hz, anchoring complex basslines and kick drums with floor-shaking impact. Mackie's decades of professional audio experience translate into reliable, gigging-ready construction—rugged cabinet paired with built-in handles and a featherweight 31.9 kg frame for practical transport between venues.

Connectivity and crossover flexibility are central to this subwoofer's integration into diverse setups. Stereo XLR inputs accept signals from DJ controllers and mixers, whilst high-pass XLR outputs (with four selectable modes: Thump 12 at 140 Hz, Thump 15 at 110 Hz, Thump GO at 150 Hz, or Variable for manual adjustment) route filtered signal to paired loudspeakers. A 1.4 ms alignment delay maintains phase coherence across the system; dual full-range XLR outputs allow chaining multiple subs. Variable level control spans muted to +6 dB, phase invert and stereo/mono summing accommodate single or dual deployment, whilst the M20 threaded pole socket accepts Mackie's SPM400 pole for stacked systems.

The THUMP18SV4 stacks atop Thumpv4 loudspeakers to create compact, vertical PA rigs that maximise coverage whilst freeing floor space—critical for club environments and mobile DJ setups constrained by venue geometry. Its 630 mm width and 605 mm depth fit standard speaker stands and flight cases, making it practical for regular road use without sacrificing the extended bass response that defines modern electronic music production and DJ performance.

Features

• 1400W Class-D amplifier with 132 dB maximum SPL output
• 18” high-performance woofer extending to 25 Hz low frequency
• Four high-pass crossover modes: 140 Hz, 110 Hz, 150 Hz, or variable
• Stereo XLR inputs and high-pass outputs with 1.4 ms alignment delay
• Full-range XLR outputs for daisy-chaining multiple subwoofers
• Phase invert switch, variable level control, mono/stereo summing
• M20 speaker pole thread for SPM400 pole mount (sold separately)
• 31.9 kg weight with built-in handles and rugged modern construction