Feel Your Walls Melt Away. The A4A delivers realistic sound and video that transports you out of your home and into your favorite movie. Whether you’re watching, listening or gaming, you’ll feel completely immersed. Works with Sonos! Unite your Yamaha home theater with a Sonos system using a Sonos Port, sold separately. After a quick setup, the Sonos app can seamlessly power on the receiver, select a designated input and control the volume.