Yamaha DXR and Monitor hiss

Quote from Trazan

Since the hiss is reduced when lowering the DXR's input (and not increased by raising Kempers output), this exess hiss is due to improper gain staging, and comes from additional gain on the DXR. The DXR can take a maximum of +16 dBu on input 2, and Kemper's maximum TS output is in fact +16 dBu. There really is no need to attenuate the monitor out at all Just be sure to keep the Kemper's output led out of the red.

EDIT: I see that there's not much to go on, as the DXR's input approaches "OFF" at this point....so just set Kemper's output where you feel it's a good balance. Anyway, you shouldn't be afraid to overload the DXR

Is dBu an absolute unit of measurement, unrelated to input signal strength and gains throughout the chain preceding the monitor out volume control?

Quote from Michael_dk

Is dBu an absolute unit of measurement, unrelated to input signal strength and gains throughout the chain preceding the monitor out volume control?

No, the dBu output (voltage output) on the Kemper is max +22 dBu on the XLR's and +16 dBu on the jacks (beyond that the outputs will clip). This maximum output voltage is reached when the Kemper goes into the red on the output led (somewhere...it's not very precise ). Assuming the outputs are not attenuated, that is (e.g. if Monitor Out is attenuated -10 dB, it will put out +6 dBu instead at the same point).