PreSonus ERIS PRO 4 High-Definition Coaxial Monitor (Single) - 4.5"The Eris Pro 4 reference monitors employ a single point source coaxial design for clear and accurate sound reproduction. This design provides superior phase alignment between components and delivers a wide sweet spot, precise stereo imaging, and symmetrical dispersion patterns unique advantages for Dolby Atmos immersive rooms as well as stereo mix environments. The Eris Pro 4 also delivers finely detailed transient response, and stunning dynamics that