HT-A9 Home Theater System with 360 Spatial Sound Mapping technology Feel sound from every direction with Sony’s revolutionary 360 Spatial Sound on the HT-A9. 360 Spatial Sound Mapping technology creates up to twelve phantom speakers from just four speakers by synthesizing sound waves. Thanks to the phantom speakers, the sound field becomes wider and more enveloping. Sony’s widest ever sound field fills every part of the living space, so everyone gets the same sound experience, wherever they are in the room. The A9 also supports Dolby Atmos® and DTS:X®, so users can experience cinematic surround sound from the comfort of their home. Official Website https://www.sony.co.uk/electronics/sound-bars/ht-a9