With so much free internet music why bother with XM on the 4308?
This what it says in my 3808 manual I would imagine the 4308 is the same:
"The AVR-3808CI is an XM Ready® receiver. You can receive XM®
Satellite Radio by connecting to the XM Mini-Tuner and Home Dock
(includes home antenna, each sold separately) and subscribing to the
• Plug the XM Mini-Tuner and Home Dock into the XM connector on
the rear panel.
• Position the Home Dock antenna near a south-facing window to
receive the best signal.
For details, see “Listening to XM Satellite Radio Programs” (vpage
When making connections, also refer to the operating instructions of
the XM Mini-Tuner and Home Dock"