Captivating bass. At the push of a button. You can choose between two different types of bass enhancement: ULT1 for deep, low-frequency bass or ULT2 for powerful, groovy bass. Restoration of original sound. Compressed original music media often lack high-frequency elements that add detail and richness to the sound. The Digital Sound Enhancement Engine (DSEE) restores these elements faithfully to recreate the high sound quality of the original recording. Your sound, your way. Customize your sound to your liking. Choose from numerous presets that match the genre you are currently listening to. Alternatively, set your own preferences using the equalizer function in the Sony Headphones Connect app and save them. Head tracking feature. When paired with compatible smartphones and services, head tracking provides a realistic and immersive listening experience by automatically adjusting the sound fields to your head movements. The sound is precisely aligned with your smartphone's screen, even as you move, offering you an engaging experience. Certified headphones - a personalized experience. With Sony's 360 Reality Audio certified headphones and the Sony Headphones Connect app, you can optimize your experience through an analysis of your ear shape and immerse yourself in captivating sounds. 360 Spatial Sound Personalizer. With the Sony 360 Spatial Sound Personalizer app, enjoy a sound experience that is perfectly tailored to you. The app determines and analyzes your ear shape, allowing these headphones, when paired with a Bravia XR TV, to create your very own spatial sound field.