UR28M analog inputs noise

Hi

I’m a new user of UR28M and have hiss in the outputs (main and headphones) generated by the analog inputs. each analog input generate noise. when i mute the inputs in the Dspmix, no noise at all. Is it normal?
I also have some pops with cubase ( not latency).

I’m asking this in the forum because i don’t have access to any support in my region. i don’t understand this zoning thing with the support. if someone can give me an email adress for steinberg support it would be great.

Thanks

Seems to me you have something turned up too high. The DSPMixFX faders shouldn’t need to be above 0.0.

A more detailed answer is not possible due to lack of info!