An update.. I wrote to ibasso, and they told me that the click sounds are there by design .. so fine. Changing the usb cable the other problem seems vanished... 

I have the same issue of KT66 ; keep me updated please. .. Moreover I can hear a 'click' sound when I turn off and I turn on the device .. I am pretty sure that this didn't happen till the last couple of days ..

Thank you guys. I have my re262 broken and I have to decide if to ask for a replacement or an upgrade to re 272, so, your observations are very usefull to me In the end, I'm quite afraid to go for a more analytical earphone, since I've never heard one and also since I listen to very...

Ciao, happy Xmas.