Hi Guys,
I have also finally reached the satisfactory result.
Initially I was using the interface -> SPDIF out -> SPDIF IN my kemper. This was the DI track from my DAW to the Kemper
The Result was a very weird signal sound. Signal was completely weak, even I have tweaked the Clean Sense.
Tonight, I have just tried to use the via my interface out -> Kemper Input front -> SPDIF out -> Interface. I have changed to use the front input rather than the SPDIF in on the kemper.
The result is completely different. It is rich and strong. I am not sure why SPDIF OUT -> SPIDF IN can make the ideal result. I thought it is preferable to use the SPDIF rather than the analog signal. I am not sure it is a bug, may be it will be improved when the new software release.
However, It seems that I have got a satisfactory result now. My Signal chain for the reamp is :
DI track -> Interface out (One of the channel out in my interface) -> Front input (Kemper) -> SPDIF out to the DAW (new track)