True X Surround ready - add True X surround speakers (speakers sold separately). Wireless subwoofer offers room-filling bass. Dolby Atmos offers encompassing sound. Speakers produce a three-dimensional sound. Engineered for true sound optimization. Compatible with Amazon Alexa. HDMI-CEC and eARC compatible. Clear Voice technology. 4 Sound modes. Bass Extension. Yamaha Sound Bar app. 280W Output power. 1 in and 1 out HDMI. Digital optical input. 4K Pass-through. Subwoofer dimensions: 7.375"W x 16"H x 16.125"D. Soundbar dimensions: 40"W x 2.5"H x 4.375"D.