Personally recommend Yajia. The key is to look at your needs, dear. Yajia power amplifier has good function and high cost performance. Its function is to amplify the weak signal from the sound source or preamplifier and promote the sound of the speaker. It is the most basic equipment in audio system, and a good set of audio system power amplifier plays an important role. The main performance indexes of power amplifier include output power, frequency response, distortion, signal-to-noise ratio, output impedance, damping coefficient and so on. Yajia's power amplifier has done a good job in the industry, with clear sound and heavy weight. It can be seen that a lot of efforts have been made in materials. However, Yajia is a Japanese brand, and it is difficult to find a famous brand amplifier made in Japan now. As the predecessor of Golden Voice, TRIO brand power amplifier enjoys a high reputation in the world. Strict workmanship, feverish materials, friends who went to Europe and Germany in those years liked it very much, which is the characteristic of this brand of amplifier, with dense timbre, strong analysis and good control. This advanced power amplifier is no exception, no matter how difficult it is to push the speaker, it can be pushed well.