The battery in my AIR is dead/I am experiencing interference on all channels. Can I connect with a cable instead of the wireless connection?

Yes! All AIR units have what we call 'Wired Mode,' which allows the AIR wireless companion speaker to be used just like an unpowered wired companion speaker. Power and audio signal are sent from the main unit to the AIR companion speaker with a cable. Simply power off the companion speaker, flip the switch into 'Wired Mode,' plug in your speaker cable (SC-50NL for Liberty, SC-50 for MegaVox), and the main unit will power the companion.