In the end, I chose Kaiyin, the box was equipped with the new Si Benda, the sound source Marantz network player, the human voice is very poisonous, especially the female voice, and the string music is also very good! The transient is slightly lacking! Hyper-threading level is obviously better than triode! The tone of the triode is average, and in order to clean the bottom noise, a power filter is added, and the effect is very good! ! !