The Sony HT-A9M2 BRAVIA Theater Quad Surround Speakers with Dolby Atmos is a wireless home theater system designed to deliver an immersive cinematic audio experience. It features four wireless speakers that can be placed around the room to create a 360-degree soundstage. The system uses Sony's 360 Spatial Sound Mapping technology to create up to 12 phantom speakers, enveloping the listener in sound. It supports Dolby Atmos and DTS:X for object-based audio, adding a vertical dimension to the soundstage. The HT-A9M2 also features Sound Field Optimization, which calibrates the audio based on the room's acoustics and the listener's position. This ensures that everyone in the room enjoys the same immersive soundscape, regardless of where they are seated.