When turning the sweep FX knobs quickly with use with filter there is bad audio quality noticeable! Like a very cheap filter sound: clicking/popping really annoying sounds. Are there more people who experienced this issue? I also noticed it happens with the master volume knob when I had to quickly turn the volume to zero.
Most of the FX have a volume issue on my unit, whereas the fx is much louder than the track playing.
I know this is an old post but did you ever get a solution to this from Denon? My Go has the same problem with the filter sweep, it seems to improve slightly if you put pressure on the knob but that not a solution.