Add a pair of speakers to the WXA-50 MusicCast streaming amplifier and enjoy wireless music in any room. Easy music streaming meets high-quality Yamaha amplification Yamaha's WXA-50 MusicCast amplifier makes it easy to enjoy your favorite Internet music streaming services, audio files, and more in any room of your house. Just connect a pair of speakers and use your existing Wi-Fi network to access your tunes with the free MusicCast mobile app. This stereo amp packs 55 watts per channel into a compact-but-sturdy metal chassis that fits in tight spaces.