Mackie SR 18s

1600W Class-D amplifier is designed for ultra-reliable, consistent performance
Custom high-efficiency transducer ensures maximum punch
Increases efficiency of your full-range loudspeakers by taking care of the low end for the entire system
Built-Like-A-Tank™ to conquer every gig while lightweight for easy loading
Frequency response: 33Hz - 200Hz
Max SPL: 133 dB