Can anyone tell me who is better at improving sound quality between Japanese and European and American amplifier speakers?

In terms of improving sound quality, there have been Japanese hosts and European and American amplifier speakers in the industry. From a professional point of view, Japanese power amplifiers and speakers are characterized by sharpness, strong irritation, hard overall effect, and weak bass fullness. It doesn't sound like a group, and its flexibility is not obvious. But for ordinary car owners, it should be easier to create a corresponding atmosphere, whether it is used to appreciate rock, pop or symphony, that is to say, the overall adaptability and application are relatively wide.