Loud hiss upon startup

Is this behavior normal? Every time I turn my KPA on, after the boot sequence it makes a loud hiss which then slowly fades away as soon as I start playing. The reason I ask is to know if this indicates I need to follow one of the reset procedures (already performed the system reset) like the flash memory wipe. I've only got the Kemper for a few days, its DSP is from November if I'm not mistaken and as soon as I unboxed it I've installed FW 1.54.

Quote from guitarnet70

Do you have the NG engaged?

My input section is unlocked so NG is engaged on a per-patch basis, IIRC I've been turning it off completely on cleans and leaving it at around 1-2 for crunch and lead rigs. But what happens doesn't seem related to the noise gate, as soon as the boot process is over and the current profile is loaded there's a loud hiss that after a few seconds slowly fades away and from that point on the unit is silent and operates normally.

Yeah it was the flash memory format/init, problem solved.

Oh well, and it's back again, same noise after boot, fades out slowly by itself after like 10-20 seconds.

Wonder if it's a 1.54 thing

Quote from guitarnet70

Nope, nobody got it in the Beta Test stage.

I should probably point out that I'm using the Monitor Out set to "Master Mono". I'll try the main outs tonight when I get home and see if they present the same behavior.

Quote from guitarnet70

Is what I use with the Camper and no hiss....

Now I'm starting to worry that I got a bad unit

Just out of curiosity, what do you use for monitoring your KPA? I'm connecting it to a QSC K10, which is known for emphasizing high end so depending on your setup you might not hear it as much hiss as I do.