Rousing bass. At the touch of a button. You can choose between two different types of bass emphasis: ULT1 for a deep, low-frequency bass or ULT2 for a powerful, groovy bass. Restoration of the original sound. Compressed original music media lack high-frequency elements that give music detail and rich sound. Digital Sound Enhancement Engine (DSEE) faithfully restores these to recreate the high sound quality of the original recording. Your sound, to suit your taste. Customise your sound. Select one of the numerous presets to suit the genre you are listening to. Or use the equaliser function in the Sony. Headphones Connect app to define and save your own settings. Head tracking function. In conjunction 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 tuned to the screen of your smartphone, even when you move, to give you an immersive experience. Certified headphones - personalised experience. With 360 Reality Audio certified headphones from Sony and the Sony. Headphones Connect app, you can optimise the experience by analysing your ear shape and immerse yourself in captivating sounds. 360 Spatial Sound Personaliser. With the Sony 360 Spatial Sound Personaliser app, you can enjoy a sound experience that is optimally tailored to you. The app detects and analyses your ear shape so that these headphones can create your own personal spatial sound field when paired with a Bravia XR TV.