Low Latency Monitoring is no longer available for the Firestudio family of interfaces in Studio One 4.
With Studio One 4, some legacy devices will no longer show the exact picture of your device in the Audio Setup window or in the Audio Setup section of the Startup page. There is a generic picture in the program for discontinued hardware. You can still use the device, you will just not see the picture. Below you will find a link to our discontinued product page.
https://www.presonus.com/products/Discontinued-Products