On the subject of sound formats, it’s important to ensure all of your sources are sending Dolby Digital signals to your TV, and that the TV can accept and send them to the Beam natively. Depending on the devices involved, this can be a fiddly process, but it’s worth making the effort as Dolby Digital signals result in a far better performance.
As is the norm for Sonos speakers, you will be prompted during installation to tune the Beam’s sound using the company’s Trueplay system, which uses your iPhone’s microphone to tailor the sound to your room and usual listening position (Android phones are not supported).
While the Beam sounds better when ‘Trueplayed’, the difference isn’t as marked as with the company’s other speakers. At least this means you should get relatively close to the Beam’s best performances even without an iPhone.”