Built for the rigors of the road, Harbinger is the choice for the working musician who wants a feature rich, affordable, and reliable speaker system. Representing years of research and development, our special compression driver provides a more balanced, flat response, and Harbinger crossover networks use an advanced Inaudible Protection Circuit (IPC) that protects speaker components. Every Harbinger component is built with rugged, pro-grade materials, resulting in rock-solid construction that musicians, DJs and audio professionals can depend on... time after time.