The Harbinger VARI Live VS18 features a built-in Class-D amplifier that delivers 600W (2,400W peak) of clean power for a maximum SPL output of 134dB, providing low distortion and clarity—even if thundering lows are pumping aggressively throughout the venue. To help protect the speaker when the bass is really pumping, the VS18 has clip LEDs for each input to guard against raging signal levels, and front- and rear-mounted limiter LEDs that let you know when maximum volume has been attained. 

Any full-range speaker can be integrated with the subwoofer by setting the VS18's crossover control yourself and tailoring its response to work with the mains you are using. You can even adjust the VS18's Time Aligning Delay control to combat phase-alignment issues that can rob the sub of maximum bass. A transparent limiter is also onboard to keep the lows taut and protect the speaker when it's operating at high volume levels.  

The VS18 has the inputs and outputs to integrate with just about any sound system. Dual XLR combo connectors accept balanced and unbalanced XLR inputs, as well as 1/4" jacks, so however your system is configured, it can welcome a VS18 to the party. Two XLR outputs let you add more subs for bigger venues, and an output level control is dedicated to the VS18 alone, so you can adjust sub lows without affecting the volume of the connected main speakers.  

With ergonomically placed handles and easy rolling, lockable casters, the VS18 is surprisingly agile and easy to transport and store.