Handy to have a decent small SS amp around. :)
If I remember the Totems used the XT-25 tweeter that is anything but harsh. So I will have to be on the tube guessing camp. Note the range you may be hearing may actually be woofer breakup. Also note, if I got my speakers correct, the Vifa is great above 4K, so that puts quite a strain on the woofer. Anyone who tries to use the Vifa much lower, well it's distortion skyrockets as it just does not have the surface area.
Now, harshness is an issue. Due to the loudness wars, a lot of newer CDs are quite hot. Doe to how digital filtering works, there is rick of digital clipping in the DAC. This is why I set my JRiver to the default -1 dB and some suggest -3. It helps on those female vocals, Judy Collins, Joni Mitchel etc. I have also found differences in DACs to make this more or less sensitive. Some DACs, like the RME have this internally. I do not know if any CD player does.