Behringer Truth B2031P High-Resolution, Ultra-Linear Reference Studio Monitor Speaker Ultra-linear frequency response from 55 Hz to 21 kHz High-resolution, passive 2-way 150-Watt nearfield monitor Extremely high-resolution, ferrofluid-cooled tweeter Long-throw 8 " woofer with special polypropylene diaphragm and deformation-resistant aluminum die-cast chassis Controlled dispersion characteristics and extremely large "sweet spot" through BEHRINGER's wave guide technology