Behringer TRUTH B3030A 2-Way Active Ribbon Studio Reference Monitor with Kevlar Woofer Ultra-linear frequency response with individual frequency diagrams Built-in 75 and 35-Watt power amplifiers with enormous power reserve Ultra-high resolution, 2 velocity ribbon transducer for ultimate sound reproduction Long-throw 6 " woofer with deformation-resistant Kevlar cone and aluminum die-cast chassis for ultimate bass response Adjustable to a wide range of acoustic conditions and subwoofer operation