Sonos Beam is a more compact speaker and can fit almost anywhere. Playbar and Playbase have more speakers, so they produce louder sound with more width and bass. Beam is perfect for small to mid-sized rooms, whereas Playbar and Playbase are capable of filling large spaces. Beam features HDMI connectivity and has Alexa voice control built-inwhile Playbar and Playbase rely on Optical and work with other Alexa-enabled devices.