The RMA 220 has a hidden "Chat Mode." Press Play/Pause + Volume Up simultaneously to boost mids and lower bass for clear voice calls.
If these steps fail, the manual directs you to JBL customer support or an authorized service center. jbl rma 220 user manual NEW%21
The new user manual dedicates two full pages to button layouts. Here’s a summary: The RMA 220 has a hidden "Chat Mode
For the best experience: