Hi plutos... To answer your question about the HF for the Sonica DAC. I don't know if I would describe it as warmer. It is definetly not rolled-off. I would describe it as more defined. Comparing it to the 105, it has more detail, instead of simply hearing a cymbal in the music, I hear the strike of the cymbal and more decay. This is not only evident in the HF, but thought the hole bandwidth. I enjoyed listening to the 105, but I did find it a little fatiguing, definetly not the case with the Sonica. Hope this helps.