Due to its closed-back design, the Dali IO-6 Immersive Noise Canceling Headphones provide natural passive noise isolation. That means you get to focus on the music you want to hear rather than the noise you don’t. These IO headphones also use active noise-cancelation technology to better remove low-frequency sounds that passive noise isolation can’t block. Working wirelessly, these Dali headphones connect to your device over Bluetooth. And to deliver high-quality connectivity, they use aptX, aptX HD, and Apple AAC. But..