A media player is perfect for listening to music. It has an RCA stereo port. You can connect wirelessly in several ways, for instance Bluetooth.
From HiFix
"Bowers and Wilkins Formation Audio Multi Room System (Open Box)"
Peter Tyson
Bowers & Wilkins Formation Audio - Wireless Music Streamer
Soundcraft Hi-Fi
Bowers & Wilkins Formation Audio - Formation Streaming Component