1. Sound quality performance: the sound quality of the rear stage of Zhong Shen JA99B is softer and the bass is fuller, which is suitable for playing all kinds of music, while the sound quality of the rear stage of Shengya SP332 is not soft enough, and the types of music that can be played are limited.

2. power output: the power output of the rear stage of Zhongshen JA99B is higher than that of the rear stage of Sonya SP-332, which can drive larger speakers and is suitable for home theater and other occasions, while the power output of the rear stage of Sonya SP-332 is relatively low.