Why is "UPGRADE TUNER" displayed on my Marantz SR6003 Receiver?
- JJohn CallahanSep 23, 2025
If "UPGRADE TUNER" is displayed, the connected XM CNP-1000 is incompatible. Upgrade the XM CNP-1000 to the XM Mini-Tuner and report the model of the AV receiver and the ID number of the CNP-1000 to XM Listener Care.















