class D amps with tube-like sound - I read and read. I think the best comment on it is on Spectron web site:
" The published measurements of many class D amplifiers reveal that while their THD is primarily second-harmonic in nature, there are also some higher-order harmonics present. This pattern of distortion is very similar to the pattern of distortion in poorly designed tube amplifiers. Thus, sonically, this euphonic coloration is confused by some with the warmth of tube amplifiers. In reality this deviation acts as both an annoyance and murky veil. In exchange for euphonic, overly rich harmonic texture (of absolutely artificial origin) the listener gets no transparency and a lower level of true detail."
As I understand, Spectron goal is ulta low distortion levels particularly of odd-order harmonics.
" The published measurements of many class D amplifiers reveal that while their THD is primarily second-harmonic in nature, there are also some higher-order harmonics present. This pattern of distortion is very similar to the pattern of distortion in poorly designed tube amplifiers. Thus, sonically, this euphonic coloration is confused by some with the warmth of tube amplifiers. In reality this deviation acts as both an annoyance and murky veil. In exchange for euphonic, overly rich harmonic texture (of absolutely artificial origin) the listener gets no transparency and a lower level of true detail."
As I understand, Spectron goal is ulta low distortion levels particularly of odd-order harmonics.