This Sonarworks Apollo Monitor Correction Add-on integrates directly into Universal Audio’s Apollo X Gen 1 and Gen 2 interfaces. Suitable for use by audio professionals as well as audio enthusiasts, it provides you with speaker and headphone calibration. This allows you to achieve consistent results and deliver accurate sound with near zero latency. Apollo Monitor Correction supports hardware calibration for over 500+ supported headphone models and runs on Windows and Mac systems.