Cloud 3 wireless - am I missing something?

So my beloved cloud 2 wired headset has finally seen the end of it's life after 5 years or so of use. Perfect headset - never had any complaints. Thought I'd use this an opportunity to upgrade to a cloud 3 wireless set. The the audio quality is nothing short of atrocious - I've had £15 brandless earphones on that give better sound range than these. Going by what people have said, reviews etc, I cannot believe the audio quality would be such a downgrade, so I must be missing something? I'm using them on pc - firmware drivers all updated through hyperx software, I've enabled DTS (through it's own app and through nginuity separately - both made barely any difference).

The entire sound range just sounds so weak, I've had to increase in game sound settings massively to get the volume I had before, only now it's incredibly tinny.

Before I return these does anyone have any advice? Thanks