Bowers and Wilkins launch the PI7 and PI5 wireless headphones Headphones with secret agent-like model names Credit: Bowers and Wilkins True Wireless (TWS) headphones are immensely popular right now in Australia. But it’s no secret that wireless isn’t always kind to sound quality. Bowers and Wilkins said they have skirted around this problem by incorporating aptX streaming technologies into their newest headphones, the PI7 and PI5. The more high-end model of the two headphones, the PI7, uses the latest version of aptX technology. It uses Qualcomm aptX Adaptive for wirelessly streaming sound from compatible devices. This technology compresses and then decompresses the sound signal as it travels from device to ear, preserving the original quality of the sound produced.