If you set the Airy as "headset" in the PC sound settings, this activates a special sound pattern where the bass range and mids are reduced to increase speech intelligibility.
Tip: If you set the Airy on the laptop/PC as "headphones" (without microphone) and not "headset", the sound image is without bass/mid reduction.
By the way, a feature has been built into Windows 10 that allows you to easily switch between headset and stereo mode - simply by clicking the speaker icon in the taskbar.