Cedar41 - What I would do, assuming I didn't need top quality stereo, is buy a portable radio, boom box or whatever, and tune it into the frequency of the XM modulator. 87.9 MHz is the standard frequency of the modulator and let the radio play XM for you. If you don't have the modular hookup in the RV, you can buy a modulator and use it to provide the signal for the portable radio. Most people already have portable radios so you may not need to buy one. Any FM radio can be used and the quality of music you desire can dictate what you want to use. Since there is the AC outlet in the bay, you can plug any house hold radio in and play XM...heck, even a Bose tabletop. If the modulator signal is too weak at the bay you can run any wire up to the modulator and back to the bay so it is near the radio and your signal will then be strong enough.
'01 Alpine 36 FDDS