Noticed it a few minutes ago, this is what it sounds like. Firmware is latest update. Started a new thread, since i didn't think it really sounded like the ones the other guys had. I restarted the KPA, and it went away for a few minutes.
https://soundcloud.com/jesperbrunnstrom/kpa-crackle
EDIT: Forgot to mention, i'm not running it directly through a speaker. I'm reamping from guitar tracks i recorded yesterday in logic, through SPDIF.