Discerning audio engineers and producers on a budget should consider the PreSonus Eris Studio 4, a nearfield monitor designed to sound good in any location. Tune the monitor to your specific environment with a bevy of convenient acoustical features. The monitor offers an exceedingly wide sweet spot, thanks to the Elliptical Boundary Modeled (EBM) waveguide, which ensures a wide and controlled dispersion. A 50W Class-AB amplifier powers the 4.5" composite woofer and a 1" silk-dome tweeter, which combine for a full-range sound with plenty of volume.